Adams County, ID — Planting Guide
Your June game plan for Adams County, Idaho
June is a pivotal month for Adams County, Idaho gardens. Focus on these tasks first and you'll set up the rest of the season for success.
-
Time to transplant basil, cucumber, and peppers
Your last frost (May 20) has passed. These warm-season crops can handle outdoor soil now.
-
Direct-sow columbine and echinacea (purple coneflower)
Rake a smooth bed, make a shallow furrow, drop seeds at the spacing on the packet, water gently, walk away.
-
Begin indoor sowing: cucumber, kale, and lettuce
Label every cell. You will absolutely forget which is which otherwise.
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Collect lettuce, radish, and anemones at their peak
The more you pick, the more the plant produces. Letting fruit overripen tells the plant it's time to stop.
Get ahead of July
- Starting indoors: basil, peppers, and pole beans
- First harvests: basil, carrots, and cucumber
- Fall sowing: carrots, kale, and lettuce
Adams County is in USDA Zone 6a. The average last spring frost is May 20 and the first fall frost is September 25, giving you a growing season of approximately 128 days.
At an elevation of 6,593 ft, Adams County receives approximately 20.6 in of rainfall annually. Summer highs average 85°F with winter lows around 15°F. The predominant soil type is Loam.
Based on 28 years of NOAA climate station data, the last frost date here varies by 69 days year to year — ranging from April 14 in warm years to June 23 in cold years. The growing season is trending shorter by about 2.06 days per decade. Adams County scores 32/100 (Challenging) on the Microclimate Index.
🌡️ Zone
6a (-10°F to -5°F min)
❄️ Last Frost
May 20
🍂 First Frost
September 25
📅 Growing Season
128 days
⛰️ Elevation
6,593 ft
🌧️ Annual Rainfall
20.6 in
Monthly Watering Calendar for Adams County
When you'll need to water your garden — based on average monthly rainfall vs. the ~1 inch/week most gardens need.
What this means for you: Most vegetables want about 1 inch of water per week. Adams County gets 21" a year — months that hit that 1"/week need zero supplemental watering; months that fall short, the table tells you how much to add. Saves you from drowning roots and from drought-stressing plants into bolting.
View detailed monthly data
| Month | Avg Rainfall | Rainy Days | Extra Water Needed | Watering Effort |
|---|---|---|---|---|
| Jan | 1.4 in | 6 days | — | None |
| Feb | 1.1 in | 5 days | — | None |
| Mar | 1.9 in | 7 days | — | None |
| Apr | 2 in | 6 days | 2.3 in | High |
| May | 2.6 in | 8 days | 1.7 in | High |
| Jun | 1.4 in | 5 days | 2.9 in | High |
| Jul | 2 in | 5 days | 2.3 in | High |
| Aug | 2.1 in | 7 days | 2.2 in | High |
| Sep | 1.7 in | 6 days | 2.6 in | High |
| Oct | 1.8 in | 6 days | 2.5 in | High |
| Nov | 1.4 in | 6 days | — | None |
| Dec | 1.2 in | 7 days | — | None |
Annual total: 20.6 in. Water needs vary by crop — tomatoes need ~1.2"/week while herbs like rosemary need only 0.3"/week. Check individual plant pages for crop-specific water budgets that factor in your county's rainfall and soil drainage.
Adams County Soil Profile
Soil Type
Loam
Soil pH
6.3-8
Drainage
Well Drained
Frost Risk Probability
Based on 28 years of NOAA weather station data from 3 stations
Beginners: Plant frost-sensitive crops (tomatoes, peppers, squash) after the "Safe" date on the left. Harvest or cover them before the "Protect by" date on the right. Hardy crops (lettuce, peas, kale) can go in the yellow transition zones.
How to read this table: "Conservative" means you're safe from frost 9 out of 10 years — best for beginners and frost-sensitive crops. "Average year" is the typical date. "Aggressive" means only 1 in 10 years is that warm — experienced gardeners with frost protection can try these dates.
| Planting Strategy | Last Spring Frost | First Fall Frost | Frost-Free Days |
|---|---|---|---|
| Conservative (safest) | Jun 23 | Oct 25 | 124 days |
| Cautious | Jun 12 | Oct 7 | 117 days |
| Average year | May 20 | Sep 25 | 128 days |
| Optimistic | May 5 | Sep 11 | 129 days |
| Aggressive (risky) | Apr 14 | Aug 20 | 128 days |
Not very — frost dates can vary by ±69 days year-to-year. Use the "Conservative" row in the table below, and keep row covers handy for surprise late frosts.
Yes — growing seasons are getting shorter here (about 2.1 days per decade). Use the "Conservative" dates and choose fast-maturing varieties.
Gardening Difficulty Score
Adams County has challenging growing conditions. Season extension and careful variety selection are essential.
Local Gardening Help in Adams County
Free expert help is closer than you think. Your county's cooperative extension office connects you with trained gardeners, soil testing labs, and local programs — all specific to Adams County's climate and soil.
County Extension Office
Adams County University of Idaho Extension Extension Office
Phone: 208-885-6681
Visit Extension Office Website →
Extension offices are run by land-grant universities and funded by the USDA. Their advice is free, research-based, and tailored to your county's specific conditions.
Master Gardener Program
Free gardening help from trained volunteers
Master Gardeners are community volunteers who complete 40–60 hours of university horticultural training. They answer gardening questions, diagnose plant problems, and offer workshops — all free.
Many extension offices run a Master Gardener hotline where you can call or email with photos of plant problems for free diagnosis.
Soil Testing
Available through your extension office
Before amending your soil, get it tested. Your extension office offers soil testing (typically $10–$25) that tells you exact pH, nutrient levels, and amendment recommendations specific to what you want to grow.
Services Available in Adams County
Finding local nurseries & garden centers in Adams County
Why Buy Local
Local nurseries carry plants that are proven to grow in your area. Staff can give you advice specific to Adams County's soil and climate that big-box stores can't. Plants from local growers are typically hardier because they're already acclimated to your zone.
How to Find Them
Search for "nurseries near Adams County ID" or "garden center Adams County" on Google Maps. Also check with your extension office — they often maintain lists of reputable local nurseries and plant sales.
Community gardens & gardening groups
Community gardens are a great way to learn from experienced gardeners in your area, especially if you're limited on space. Search "community garden Adams County ID" or check your extension office and local parks department. Facebook groups like "Adams County Gardeners" or "Idaho Gardening" are also excellent for local advice and plant swaps.
What to Plant After Your Harvest
After your first crops finish, use the remaining frost-free days to grow a second round.
Show 6 more succession options
Sunlight & Day Length in Adams County
Monthly daylight hours and peak sun — critical for onion varieties, photoperiod-sensitive plants, and solar garden planning.
Why this matters: Onion varieties are sold by "short-day," "intermediate-day," and "long-day." Adams County's latitude determines which to buy — and getting it wrong is the difference between baseball-sized bulbs and marbles.
Longest Day
15.4 hours
Summer solstice daylight
Shortest Day
8.6 hours
Winter solstice daylight
Peak Sun Hours
11.1 hr/day peak (summer)
Peak sun hours (green dashed line below) account for cloud cover — this is the usable direct sunlight your garden actually receives. Most vegetables need 6+ peak sun hours.
Onion tip: Your long summer days (14+ hours) support long-day onion varieties like Walla Walla, Sweet Spanish, and Ailsa Craig.
View detailed monthly data
| Month | Daylight Hours | Peak Sun Hours | Day Length |
|---|---|---|---|
| January | 9 hr | 4.8 hr | Short day |
| February | 10.2 hr | 5.9 hr | Short day |
| March | 11.6 hr | 6.6 hr | Short day |
| April | 13.3 hr | 7.4 hr | Neutral |
| May | 14.6 hr | 9.1 hr | Long day |
| June | 15.4 hr | 11.1 hr | Long day |
| July | 15.1 hr | 10.2 hr | Long day |
| August | 13.9 hr | 9 hr | Neutral |
| September | 12.3 hr | 8.8 hr | Neutral |
| October | 10.7 hr | 7 hr | Short day |
| November | 9.3 hr | 5.3 hr | Short day |
| December | 8.6 hr | 4.8 hr | Short day |
Peak sun hours factor in typical cloud cover — use these for solar panel and shade-planning calculations.
Soil Temperature & Composting in Adams County
Monthly soil temps tell you when to plant warm-season crops, and when your compost pile is actively working.
The practical takeaway: Compost piles need 130-160°F internal temp to actively break down. Below 50°F ambient, microbial activity slows dramatically. Adams County's soil temperature curve also tells you when your compost is working and when it's napping.
Plant Warm Crops When
Soil reaches 60°F+
Soil rarely reaches 60°F — use black plastic mulch to warm soil.
Best Month to Compost
Jul
Microbial activity peaks when soil is warm.
Active Composting
3 months
Short season — insulate pile or use indoor vermicomposting.
View detailed monthly data
| Month | Soil 4" Deep | Soil 8" Deep | Compost Activity | Time to Finish |
|---|---|---|---|---|
| Jan | 2°F | 11°F | ❄️ Dormant | ~36 weeks |
| Feb | 2°F | 9°F | ❄️ Dormant | ~36 weeks |
| Mar | 12°F | 15°F | ❄️ Dormant | ~36 weeks |
| Apr | 24°F | 23°F | ❄️ Dormant | ~36 weeks |
| May | 39°F | 35°F | ❄️ Dormant | ~36 weeks |
| Jun | 48°F | 45°F | 🐢 Slow | ~24 weeks |
| Jul | 58°F | 50°F | ♻️ Active | ~14 weeks |
| Aug | 57°F | 54°F | ♻️ Active | ~14 weeks |
| Sep | 50°F | 50°F | ♻️ Active | ~14 weeks |
| Oct | 37°F | 41°F | ❄️ Dormant | ~36 weeks |
| Nov | 22°F | 30°F | ❄️ Dormant | ~36 weeks |
| Dec | 9°F | 18°F | ❄️ Dormant | ~36 weeks |
Highlighted rows = soil 60°F+ (safe for warm-season transplants). Compost finishes fastest during peak activity months.
Pest & Disease Pressure in Adams County
Computed from local climate patterns — warmer, humid conditions increase pest generations and fungal disease risk.
Quick context: Two gardeners can grow identical seeds and get wildly different results based on pest pressure alone. Adams County's climate sets a floor on what's possible without intervention.
Insect Pest Pressure
Moderate — common pests appear but manageable with monitoring.
Disease Risk
Low disease risk — dry conditions reduce fungal problems.
Seasonal Risk
View 5 common pests in your area
| Pest | Risk Level | Peak Months |
|---|---|---|
| Aphids | Moderate | May, Jun, Jul, Aug |
| Japanese beetles | Moderate | Jun, Jul, Aug |
| Squash bugs | Moderate | Jun, Jul, Aug |
| Tomato hornworms | Low | Jul, Aug |
| Cabbage loopers | Low | May, Jun, Jul, Aug |
Organic pest management tips
- Maintain healthy soil with regular compost additions to build natural pest resistance
- Practice crop rotation annually to break pest cycles
- Encourage beneficial insects with flowering herbs like dill, fennel, and yarrow
Cover Crops for Adams County
Cover crops protect bare soil, fix nitrogen, suppress weeds, and improve soil structure — with planting dates calibrated for your area.
Why it matters: Cover crops are the experienced gardener's secret weapon. Adams County's climate determines which species thrive: clover and vetch in mild winters, cereal rye and Austrian peas in cold ones.
Spring Cover Crops (3 options) — Build soil before the main growing season
| Crop | Plant By | Terminate | N-Fixing | Soil Benefit |
|---|---|---|---|---|
| Buckwheat | Jun 1 | Jul 31 | — | Rapid growth, attracts pollinators, suppresses weeds |
| Sorghum-sudan grass | May 29 | Jul 31 | — | Massive biomass, breaks compaction, suppresses nematodes |
| White clover | Apr 22 | Jul 31 | ✓ Yes | Living mulch, fixes nitrogen, permanent ground cover |
Summer Cover Crops (1 options) — Fill gaps and suppress weeds between plantings
| Crop | Plant By | Terminate | N-Fixing | Soil Benefit |
|---|---|---|---|---|
| Sunflowers | Jun 18 | Sep 4 | — | Deep roots break compaction, attract pollinators and beneficial insects |
Fall Cover Crops (6 options) — Plant after harvest to protect soil over winter
| Crop | Plant By | Terminate | N-Fixing | Soil Benefit |
|---|---|---|---|---|
| Austrian winter peas | Jul 31 | May 6 | ✓ Yes | Fixes nitrogen, good for heavy clay soils |
| Daikon radish | Aug 12 | May 6 | — | Deep taproot breaks compaction, excellent for clay soils |
| Hairy vetch | Jul 7 | May 6 | ✓ Yes | Excellent nitrogen fixer, good for depleted soils |
| Oats | Aug 13 | Apr 29 | — | Quick biomass, winterkills in cold zones — no spring tillage needed |
| Winter rye | Jun 17 | Apr 29 | — | Suppresses weeds, prevents erosion, breaks up compacted soil |
| Winter wheat | Jun 16 | Apr 29 | — | Erosion control, weed suppression, good biomass |
Wind & Microclimate in Adams County
The practical takeaway: Wind dries soil, knocks over young transplants, and disrupts pollination for bees and butterflies. Adams County averages 10.9 mph — above 10 mph means windbreaks (shrubs, fences, taller crops to windward), staked tomatoes from day one, and an extra round of watering during dry windy spells. Lower wind = lower water bills and fewer broken stems.
Wind dries soil, stresses plants, and affects frost patterns. Understanding your exposure helps with garden placement.
Seasonal Wind Speed
Spring: 14 mph Summer: 11 mph
Fall: 11 mph Winter: 14 mph
Prevailing wind: W. Windy area — plant a windbreak hedge on the W side of your garden.
Windbreak Benefit
7/10
Strongly recommended — a windbreak (fence, hedge, or row of tall crops like corn or sunflowers) will significantly improve garden yields.
Frost Pocket Risk
High
Hilly terrain with 1,820 ft of elevation range — cold air pools in low spots. Avoid planting frost-sensitive crops in valleys.
Rainwater Harvesting in Adams County
How much water you can collect, when to collect it, and what size system you need for your garden.
Why it matters: Rainwater is unchlorinated, unfluoridated, and at ambient temperature — plants actually prefer it. Adams County's 21" annual rainfall means even a small 50-gallon barrel catches enough for a few weeks of garden watering between storms.
Annual Collection
10,267 gal
Per 1,000 sq ft of roof area (at 80% collection efficiency)
Recommended Setup
7 rain barrels (55 gal each)
For a typical 500 sq ft garden. Serious collectors: consider a 1,750 gal tank.
Legal Status
Unrestricted
Rainwater harvesting is fully legal in your state with no restrictions.
Best Collection Months
Apr, May, Jul, Aug
Highest rainfall months — your barrels will fill up quickly during these months.
Months to Draw From Storage
Feb, Nov, Dec
Dry months when you'll rely on stored water — size your storage for this gap.
Rainwater collection tips for your area
- Your county receives approximately 20.6 inches of rain per year
- A 1,000 sq ft roof can collect roughly 10,267 gallons annually
- Rainwater harvesting is fully legal in your state
- Stock up on stored water before your dry season (Feb, Nov, Dec)
- Use a first-flush diverter to keep roof debris out of your collection
Soil & Growing Conditions in Adams County
Soil Type
Loam
Soil pH 6.3–8 · Excessively Drained drainage
Native soil is well-suited to most vegetables and herbs with regular compost additions.
Watering Needs
Drought stress: 7.5/10
High drought stress. Consistent irrigation is essential — consider drip systems, heavy mulch, and drought-tolerant varieties.
Season Tips
128-day frost-free season
A short season means indoor starts are critical for warm-season crops. Prioritise cold-hardy, fast-maturing varieties and use row covers to extend autumn harvests.
Your Free Printable Garden Planner
Plan every bed, every planting, every harvest — in one place. This 22-page printable includes your zone's planting calendar, a month-by-month task list, a seed inventory tracker, a harvest log, and succession-planting charts. Built to print, write in, and actually use all season.
Recommended for Your Garden
Test your soil pH, nitrogen, phosphorus, and potassium levels before planting.
Get instant, accurate soil pH readings to fine-tune your amendments.
Boost soil fertility and structure with rich, well-aged organic compost.
🥬 Vegetables to Grow in Adams County
107 vegetables that grow well in Zone 6a with planting dates for Adams County.
Show all 107 vegetables with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Fall Plant | Harvest | Days to Maturity |
|---|---|---|---|---|---|---|
| Acorn Squash | Apr 15 | May 27 | Jun 3 | — | Aug 26 – Sep 30 | 80–100 |
| Amaranth | Mar 25 | May 27 | Jun 3 | — | Sep 2 – Oct 21 | 90–120 |
| Arugula | Apr 15 | May 6 | May 20 | Jul 17 | Jun 24 – Aug 26 | 30–50 |
| Asparagus | — | — | Jun 3 | — | — | 730–1095 |
| Beets | — | May 6 | — | Jul 17 | Jul 1 – Jul 29 | 50–70 |
| Belgian Endive | Apr 15 | May 6 | May 20 | Jul 17 | Sep 9 – Nov 4 | 110–150 |
| Bitter Melon | Mar 25 | May 27 | Jun 3 | — | Aug 5 – Sep 16 | 60–90 |
| Black Beans | — | May 27 | — | — | Aug 26 – Oct 14 | 90–120 |
| Bok Choy | Apr 15 | May 6 | May 20 | Jul 17 | Jul 1 – Aug 5 | 40–60 |
| Broccoli | Apr 15 | May 6 | May 20 | Jul 17 | Jul 22 – Sep 2 | 60–90 |
| Broccoli Rabe | Apr 15 | May 6 | May 20 | Jul 17 | Jul 1 – Aug 5 | 40–60 |
| Brussels Sprouts | Apr 15 | May 6 | May 20 | Jul 17 | Aug 19 – Oct 14 | 90–130 |
| Butternut Squash | Apr 15 | May 27 | Jun 3 | — | Sep 2 – Oct 7 | 85–110 |
| Cabbage | Apr 15 | May 6 | May 20 | Jul 17 | Jul 22 – Sep 16 | 60–100 |
| Calabash | Mar 25 | May 27 | Jun 3 | — | Aug 26 – Oct 21 | 80–120 |
| Carrots | — | May 6 | — | Jul 17 | Jul 8 – Aug 12 | 60–80 |
| Cauliflower | Apr 15 | May 6 | May 20 | Jul 17 | Jul 15 – Sep 16 | 55–100 |
| Celeriac | Apr 15 | May 6 | May 20 | Jul 17 | Sep 2 – Oct 7 | 100–120 |
| Celery | Apr 15 | May 6 | May 20 | Jul 17 | Aug 12 – Oct 7 | 80–120 |
| Celtuce | Apr 15 | May 6 | May 20 | Jul 17 | Jul 22 – Sep 2 | 60–90 |
| Chard | Apr 15 | May 6 | May 20 | Jul 17 | Jul 15 – Sep 2 | 50–60 |
| Chickpeas | Apr 15 | May 6 | May 20 | Jul 17 | Aug 12 – Sep 23 | 80–110 |
| Chicory | Apr 15 | May 6 | May 20 | Jul 17 | Jul 22 – Sep 2 | 60–85 |
| Chinese Cabbage | Apr 15 | May 6 | May 20 | Jul 17 | Jul 15 – Aug 12 | 50–70 |
| Christmas Lima Beans | Mar 25 | May 27 | Jun 3 | — | Aug 26 – Sep 30 | 80–100 |
| Collard Greens | Apr 15 | May 6 | May 20 | Jul 17 | Jul 15 – Sep 16 | 55–75 |
| Corn | — | May 27 | — | — | Jul 29 – Sep 23 | 60–100 |
| Cowpeas | — | May 27 | — | — | Jul 29 – Sep 9 | 60–90 |
| Cress | Apr 15 | May 6 | May 20 | Jul 17 | Jun 3 – Jun 24 | 14–21 |
| Crookneck Squash | Apr 15 | May 27 | Jun 3 | — | Jul 22 – Aug 19 | 45–60 |
| Crosne | — | May 6 | — | Jul 17 | Oct 7 – Nov 18 | 150–200 |
| Cucumber | Apr 15 | May 27 | Jun 3 | — | Jul 29 – Sep 23 | 50–70 |
| Daikon | — | May 6 | — | Jul 17 | Jul 1 – Jul 29 | 50–70 |
| Delicata Squash | Apr 15 | May 27 | Jun 3 | — | Aug 26 – Sep 30 | 80–100 |
| Edamame | — | May 27 | — | — | Aug 12 – Sep 23 | 75–100 |
| Eggplant | Mar 11 | May 27 | Jun 3 | — | Aug 12 – Oct 14 | 65–85 |
| Endive | Apr 15 | May 6 | May 20 | Jul 17 | Jul 8 – Aug 12 | 45–65 |
| Escarole | Apr 15 | May 6 | May 20 | Jul 17 | Jul 15 – Aug 12 | 50–70 |
| Fava Beans | Apr 15 | May 6 | May 20 | Jul 17 | Aug 5 – Sep 16 | 75–100 |
| Fennel | Mar 25 | May 27 | Jun 3 | — | Aug 5 – Sep 16 | 60–90 |
| Garlic | — | — | — | Aug 14 | Nov 13 – Feb 26 | 90–240 |
| Green Beans | — | May 27 | — | — | Jul 22 – Sep 16 | 50–65 |
| Horseradish | — | — | Jun 3 | — | Oct 7 – Dec 16 | 120–180 |
| Hot Peppers | Mar 11 | May 27 | Jun 3 | — | Aug 12 – Nov 18 | 70–120 |
| Hubbard Squash | Apr 15 | May 27 | Jun 3 | — | Sep 16 – Oct 21 | 100–120 |
| Kabocha | Apr 15 | May 27 | Jun 3 | — | Sep 2 – Sep 30 | 85–100 |
| Kai Lan | Apr 15 | May 6 | May 20 | Jul 17 | Jul 8 – Aug 5 | 45–60 |
| Kale | Apr 15 | May 6 | May 20 | Jul 17 | Jul 15 – Sep 9 | 50–70 |
| Kidney Beans | — | May 27 | — | — | Aug 26 – Sep 30 | 85–110 |
| Kohlrabi | Apr 15 | May 6 | May 20 | Jul 17 | Jul 8 – Aug 12 | 45–65 |
| Komatsuna | Apr 15 | May 6 | May 20 | Jul 17 | Jun 24 – Jul 29 | 35–50 |
| Leeks | Apr 15 | May 6 | May 20 | Jul 17 | Aug 19 – Nov 4 | 90–150 |
| Lentils | Apr 15 | May 6 | May 20 | Jul 17 | Aug 12 – Sep 23 | 80–110 |
| Lettuce | Apr 15 | May 6 | May 20 | Jul 17 | Jun 24 – Sep 2 | 30–60 |
| Lima Beans | — | May 27 | — | — | Jul 29 – Sep 9 | 60–90 |
| Loofah | Mar 25 | May 27 | Jun 3 | — | Sep 16 – Nov 18 | 100–150 |
| Luffa | Mar 25 | May 27 | Jun 3 | — | Sep 2 – Nov 18 | 90–150 |
| Mache | Apr 15 | May 6 | May 20 | Jul 17 | Jul 1 – Aug 5 | 40–60 |
| Melon | Apr 15 | May 27 | Jun 3 | — | Aug 12 – Sep 30 | 70–100 |
| Microgreens | Apr 15 | May 6 | May 20 | Jul 17 | May 27 – Jun 24 | 7–21 |
| Mitsuba | Apr 15 | May 6 | May 13 | Jul 17 | Jul 8 – Sep 2 | 50–70 |
| Mizuna | Apr 15 | May 6 | May 20 | Jul 17 | Jun 24 – Jul 22 | 30–45 |
| Mustard Greens | Apr 15 | May 6 | May 20 | Jul 17 | Jun 24 – Aug 26 | 30–50 |
| Napa Cabbage | Apr 15 | May 6 | May 20 | Jul 17 | Jul 15 – Aug 19 | 55–75 |
| New Zealand Spinach | Mar 25 | May 27 | Jun 3 | — | Jul 29 – Aug 26 | 55–70 |
| Okra | Mar 25 | May 27 | Jun 3 | — | Jul 29 – Sep 23 | 50–65 |
| Onion | Apr 15 | May 6 | May 20 | Jul 17 | Aug 19 – Oct 7 | 90–120 |
| Pac Choi | Apr 15 | May 6 | May 20 | Jul 17 | Jul 1 – Jul 29 | 40–55 |
| Parsnip | — | May 6 | — | Jul 17 | Aug 19 – Sep 30 | 100–130 |
| Patty Pan Squash | Apr 15 | May 27 | Jun 3 | — | Jul 22 – Aug 19 | 45–60 |
| Peas | Apr 15 | May 6 | May 20 | Jul 17 | Jul 15 – Sep 9 | 55–70 |
| Peppers | Mar 11 | May 27 | Jun 3 | — | Aug 5 – Oct 14 | 60–90 |
| Pole Beans | Mar 25 | May 27 | Jun 3 | — | Jul 29 – Sep 23 | 55–70 |
| Potatoes | Mar 25 | May 27 | Jun 3 | — | Aug 12 – Oct 21 | 70–120 |
| Pumpkin | Apr 15 | May 27 | Jun 3 | — | Sep 2 – Oct 21 | 85–120 |
| Purslane | Apr 15 | May 6 | May 20 | Jul 17 | Jul 1 – Aug 5 | 40–60 |
| Radicchio | Apr 15 | May 6 | May 20 | Jul 17 | Jul 22 – Aug 26 | 60–80 |
| Radish | — | May 6 | — | Jul 17 | Jun 3 – Jun 24 | 22–35 |
| Rhubarb | — | — | Jun 10 | — | — | 365–730 |
| Romanesco | Apr 15 | May 6 | May 20 | Jul 17 | Aug 5 – Sep 16 | 75–100 |
| Rutabaga | — | May 6 | — | Jul 17 | Jul 29 – Sep 2 | 80–100 |
| Salsify | — | May 6 | — | Jul 17 | Aug 19 – Sep 30 | 100–130 |
| Savoy Cabbage | Apr 15 | May 6 | May 20 | Jul 17 | Jul 29 – Sep 23 | 70–110 |
| Scallions | Apr 15 | May 6 | May 20 | Jul 17 | Jul 15 – Aug 12 | 50–70 |
| Scarlet Runner Beans | Mar 25 | May 27 | Jun 3 | — | Aug 5 – Sep 9 | 60–80 |
| Shallot | Apr 15 | May 6 | May 20 | Jul 17 | Aug 19 – Oct 7 | 90–120 |
| Shiso | Apr 1 | May 27 | Jun 3 | — | Jul 29 – Sep 23 | 50–70 |
| Snap Peas | Mar 25 | May 27 | Jun 3 | — | Jul 29 – Sep 23 | 55–70 |
| Snow Peas | Apr 15 | May 6 | May 20 | Jul 17 | Jul 15 – Sep 9 | 50–65 |
| Soybeans | — | May 27 | — | — | Aug 19 – Oct 14 | 80–120 |
| Spaghetti Squash | Apr 15 | May 27 | Jun 3 | — | Sep 2 – Sep 30 | 85–100 |
| Spinach | Apr 15 | May 6 | May 20 | Jul 17 | Jun 24 – Aug 26 | 35–50 |
| Squash (Summer) | Apr 15 | May 27 | Jun 3 | — | Jul 22 – Sep 23 | 45–65 |
| Squash (Winter) | Apr 15 | May 27 | Jun 3 | — | Aug 26 – Oct 21 | 80–120 |
| Sunchoke | — | — | Jun 3 | — | Sep 23 – Nov 18 | 110–150 |
| Sweet Corn | — | May 27 | — | — | Jul 29 – Sep 9 | 60–90 |
| Sweet Potatoes | Mar 25 | May 27 | Jun 3 | — | Sep 2 – Oct 21 | 90–120 |
| Tatsoi | Apr 15 | May 6 | May 20 | Jul 17 | Jun 24 – Jul 29 | 35–50 |
| Tomatillo | Mar 25 | May 27 | Jun 3 | — | Aug 5 – Oct 14 | 60–85 |
| Tomatoes | Mar 25 | May 27 | Jun 3 | — | Aug 5 – Oct 14 | 60–85 |
| Turnip | — | May 6 | — | Jul 17 | Jun 17 – Jul 22 | 40–60 |
| Watercress | Apr 15 | May 6 | May 20 | Jul 17 | Jul 1 – Aug 5 | 40–60 |
| Watermelon | Apr 15 | May 27 | Jun 3 | — | Aug 12 – Sep 30 | 70–100 |
| Wax Beans | — | May 27 | — | — | Jul 22 – Sep 16 | 50–65 |
| Winter Melon | Mar 25 | May 27 | Jun 3 | — | Sep 2 – Oct 21 | 90–120 |
| Yard Long Beans | Mar 25 | May 27 | Jun 3 | — | Jul 29 – Sep 9 | 55–80 |
| Zucchini | Apr 15 | May 27 | Jun 3 | — | Jul 22 – Sep 16 | 45–60 |
🍓 Fruits to Grow in Adams County
27 fruits that grow well in Zone 6a with planting dates for Adams County.
Show all 27 fruits with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Fall Plant | Harvest | Days to Maturity |
|---|---|---|---|---|---|---|
| Alpine Strawberries | — | — | Jun 10 | — | Sep 9 – Dec 23 | 90–180 |
| Aronia | — | — | Jun 10 | — | — | 730–1095 |
| Blackberries | — | — | Jun 10 | — | — | 365–730 |
| Blueberries | — | — | Jun 10 | — | — | 730–1095 |
| Boysenberries | — | — | Jun 10 | — | — | 365–730 |
| Cantaloupe | — | — | Jun 10 | — | Aug 19 – Sep 23 | 70–90 |
| Che Fruit | — | — | Jun 10 | — | — | 1095–1825 |
| Cranberries | — | — | Jun 10 | — | — | 730–1095 |
| Currants | — | — | Jun 10 | — | — | 730–1095 |
| Elderberries | — | — | Jun 10 | — | — | 730–1095 |
| Goji Berries | — | — | Jun 10 | — | — | 730–1095 |
| Gooseberries | — | — | Jun 10 | — | — | 730–1095 |
| Grapes | — | — | Jun 10 | — | — | 730–1095 |
| Ground Cherry | — | — | Jun 10 | — | Aug 19 – Oct 14 | 65–80 |
| Hardy Kiwi | — | — | Jun 10 | — | — | 1095–1825 |
| Haskaps | — | — | Jun 10 | — | — | 730–1095 |
| Honeydew | — | — | Jun 10 | — | Sep 2 – Oct 14 | 80–110 |
| Jostaberry | — | — | Jun 10 | — | — | 730–1095 |
| Lingonberries | — | — | Jun 10 | — | — | 730–1095 |
| Medlar | — | — | Jun 10 | — | — | 1095–1825 |
| Mulberries | — | — | Jun 10 | — | — | 730–1825 |
| Pawpaw | — | — | Jun 10 | — | — | 1095–2555 |
| Persimmon | — | — | Jun 10 | — | — | 1095–2555 |
| Quince | — | — | Jun 10 | — | — | 1095–1825 |
| Raspberries | — | — | Jun 10 | — | — | 365–730 |
| Serviceberries | — | — | Jun 10 | — | — | 730–1095 |
| Strawberries | — | — | Jun 10 | — | Sep 9 – Dec 23 | 90–365 |
🌿 Herbs to Grow in Adams County
35 herbs that grow well in Zone 6a with planting dates for Adams County.
Show all 35 herbs with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Fall Plant | Harvest | Days to Maturity |
|---|---|---|---|---|---|---|
| Angelica | Apr 15 | May 6 | May 13 | Jul 17 | — | 365–730 |
| Anise | Apr 15 | May 6 | May 13 | Jul 17 | Aug 12 – Oct 28 | 90–120 |
| Basil | Apr 1 | May 27 | Jun 3 | — | Jul 29 – Sep 30 | 50–75 |
| Bee Balm | — | — | May 27 | — | Aug 26 – Nov 11 | 90–120 |
| Borage | Apr 15 | May 6 | May 13 | Jul 17 | Jul 8 – Aug 26 | 50–60 |
| Caraway | Apr 15 | May 6 | May 13 | Jul 17 | — | 365–450 |
| Catnip | — | — | May 27 | — | Jul 29 – Sep 30 | 60–80 |
| Chamomile | Apr 15 | May 6 | May 13 | Jul 17 | Jul 15 – Sep 23 | 60–90 |
| Chervil | Apr 15 | May 6 | May 13 | Jul 17 | Jun 24 – Aug 26 | 40–60 |
| Chives | — | — | May 27 | — | Jul 29 – Oct 7 | 60–90 |
| Cilantro | Apr 15 | May 6 | May 13 | Jul 17 | Jun 24 – Aug 26 | 40–60 |
| Comfrey | — | — | May 27 | — | Jul 29 – Oct 7 | 60–90 |
| Cumin | Apr 15 | May 6 | May 13 | Jul 17 | Aug 26 – Oct 28 | 100–120 |
| Dill | Apr 15 | May 6 | May 13 | Jul 17 | Jun 24 – Aug 26 | 40–60 |
| Epazote | Apr 1 | May 27 | Jun 3 | — | Jul 22 – Sep 16 | 45–60 |
| Fennel (herb) | Apr 15 | May 6 | May 13 | Jul 17 | Jul 15 – Sep 23 | 60–90 |
| Feverfew | — | — | May 27 | — | Aug 26 – Nov 11 | 90–120 |
| Garlic Chives | — | — | May 27 | — | Jul 29 – Oct 7 | 60–90 |
| Horehound | — | — | May 27 | — | Aug 12 – Oct 7 | 75–90 |
| Hyssop | — | — | May 27 | — | Aug 5 – Oct 7 | 70–90 |
| Lemon Balm | — | — | May 27 | — | Jul 29 – Sep 16 | 60–70 |
| Lemon Thyme | — | — | May 27 | — | Aug 5 – Oct 7 | 70–90 |
| Lovage | — | — | May 27 | — | Aug 5 – Oct 7 | 70–90 |
| Marjoram | — | — | May 27 | — | Jul 29 – Oct 7 | 60–90 |
| Mint | — | — | May 27 | — | Jul 29 – Oct 7 | 60–90 |
| Oregano | — | — | May 27 | — | Jul 29 – Oct 7 | 60–90 |
| Parsley | Apr 15 | May 6 | May 13 | Jul 17 | Jul 15 – Sep 16 | 60–80 |
| Rue | — | — | May 27 | — | Aug 5 – Oct 7 | 70–90 |
| Sage | — | — | May 27 | — | Aug 12 – Oct 7 | 75–90 |
| Savory | — | — | May 27 | — | Jul 22 – Sep 16 | 50–70 |
| Sorrel | Apr 15 | May 6 | May 13 | Jul 17 | Jun 24 – Aug 26 | 40–60 |
| Tarragon | — | — | May 27 | — | Jul 29 – Oct 7 | 60–90 |
| Thai Basil | Apr 1 | May 27 | Jun 3 | — | Jul 29 – Sep 30 | 50–75 |
| Thyme | — | — | May 27 | — | Aug 5 – Oct 7 | 70–90 |
| Valerian | — | — | May 27 | — | Sep 30 – Dec 9 | 120–180 |
🌸 Flowers to Grow in Adams County
53 flowers that grow well in Zone 6a with planting dates for Adams County.
Show all 53 flowers with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Fall Plant | Bloom | Days to Maturity |
|---|---|---|---|---|---|---|
| Ageratum | Apr 1 | May 20 | May 20 | — | Jul 15 – Oct 21 | 60–75 |
| Alliums | — | — | — | Aug 14 | Sep 11 – Oct 9 | 28–42 |
| Anemones | Apr 22 | — | May 20 | — | Jun 24 – Jul 22 | 90–120 |
| Astilbe | Mar 18 | — | May 27 | — | Aug 5 – Oct 14 | 70–100 |
| Bachelor's Button | Apr 8 | Apr 22 | May 20 | Aug 14 | Jul 22 – Oct 7 | 60–90 |
| Begonias | Mar 11 | — | May 27 | — | Aug 5 – Nov 4 | 70–90 |
| Black-eyed Susan | Mar 18 | May 20 | May 27 | — | Aug 12 – Nov 25 | 60–80 |
| Bleeding Hearts | Mar 18 | — | May 27 | — | Jul 22 – Aug 26 | 60–90 |
| Calendula | Apr 8 | Apr 22 | May 20 | — | Jul 8 – Oct 7 | 50–70 |
| California Poppy | — | Apr 22 | — | — | Jul 1 – Aug 12 | 60–90 |
| Celosia | Apr 15 | May 27 | May 27 | — | Jul 29 – Nov 11 | 60–90 |
| Columbine | Mar 18 | Jun 3 | Jun 3 | — | Jul 29 – Sep 2 | 70–100 |
| Coreopsis | Mar 18 | May 27 | May 27 | — | Aug 5 – Nov 25 | 60–80 |
| Cosmos | Apr 22 | May 20 | May 20 | — | Jul 29 – Nov 4 | 60–90 |
| Crocus | — | — | — | Aug 14 | Jul 3 – Jul 24 | 10–20 |
| Daffodils | — | — | — | Aug 14 | Jul 10 – Jul 31 | 20–40 |
| Dahlias | Apr 22 | May 27 | May 27 | — | Aug 12 – Nov 25 | 70–120 |
| Daylily | Mar 18 | — | May 27 | — | Aug 12 – Nov 25 | 60–90 |
| Dianthus | Mar 25 | Apr 22 | May 6 | — | Jun 24 – Sep 23 | 60–80 |
| Echinacea (Purple Coneflower) | Mar 18 | Jun 3 | Jun 3 | — | Aug 26 – Dec 2 | 70–90 |
| Foxglove | Mar 18 | May 27 | May 27 | — | Jul 22 – Aug 26 | 80–120 |
| Gaillardia (Blanket Flower) | Apr 1 | May 27 | May 27 | — | Aug 5 – Dec 9 | 70–100 |
| Geraniums | Mar 11 | — | May 27 | — | Aug 5 – Nov 4 | 70–100 |
| Gladiolus | — | May 20 | May 20 | — | Aug 5 – Nov 18 | 70–100 |
| Hostas | Mar 11 | — | May 27 | — | Aug 12 – Nov 25 | 60–90 |
| Hyacinths | — | — | — | Aug 14 | Jul 31 – Aug 21 | 14–28 |
| Hydrangeas | Mar 11 | — | May 27 | — | Aug 5 – Nov 11 | 90–150 |
| Impatiens | Mar 25 | — | May 27 | — | Aug 5 – Nov 11 | 60–75 |
| Irises | — | Division | May 27 | — | Jul 22 – Aug 19 | 60–100 |
| Larkspur | — | Apr 22 | — | — | Jul 1 – Aug 26 | 60–90 |
| Lavender | Mar 11 | — | Jun 3 | — | Aug 12 – Oct 7 | 90–120 |
| Lilies | — | Division | May 27 | — | Aug 5 – Nov 11 | 70–120 |
| Lobelia | Mar 18 | — | May 6 | — | Jul 1 – Sep 23 | 70–80 |
| Lupine | Mar 18 | May 27 | May 27 | — | Jul 22 – Aug 26 | 75–100 |
| Marigolds | Apr 8 | May 27 | May 27 | — | Jul 22 – Oct 21 | 50–70 |
| Nasturtium | Apr 22 | May 27 | May 27 | — | Jul 22 – Nov 11 | 55–65 |
| Pansy | Mar 11 | — | May 20 | Jul 31 | Jul 15 – Sep 16 | 70–90 |
| Peonies | — | Division | May 27 | — | Jul 29 – Sep 2 | 90–120 |
| Petunia | Mar 25 | — | May 27 | — | Aug 5 – Nov 11 | 70–90 |
| Phlox | Mar 18 | May 27 | May 27 | — | Aug 5 – Oct 28 | 80–110 |
| Portulaca | Apr 15 | May 27 | May 27 | — | Jul 15 – Oct 28 | 50–70 |
| Ranunculus | Apr 8 | — | May 20 | — | Jul 1 – Jul 29 | 90–120 |
| Roses | Mar 11 | — | May 27 | — | Aug 5 – Nov 25 | 90–180 |
| Salvia | Mar 18 | — | May 27 | — | Aug 5 – Nov 11 | 70–90 |
| Sedum (Stonecrop) | Mar 18 | — | May 27 | — | Sep 16 – Dec 2 | 60–90 |
| Snapdragon | Mar 11 | Apr 29 | May 20 | — | Jul 29 – Oct 7 | 70–100 |
| Sunflower | Apr 29 | May 27 | May 27 | — | Aug 19 – Nov 11 | 70–100 |
| Sweet Alyssum | Apr 1 | Apr 29 | May 20 | — | Jul 1 – Sep 9 | 45–60 |
| Sweet Pea | Apr 8 | Apr 15 | May 20 | — | Aug 5 – Oct 14 | 65–85 |
| Tulips | — | — | — | Aug 14 | Jul 24 – Aug 21 | 15–30 |
| Vinca (Annual) | Mar 11 | — | May 27 | — | Aug 5 – Nov 11 | 70–90 |
| Yarrow | Mar 18 | May 20 | May 27 | — | Aug 5 – Nov 25 | 60–90 |
| Zinnia | Apr 22 | May 27 | May 27 | — | Aug 5 – Nov 11 | 60–70 |
Monthly Planting Guide for Adams County
Gardening Guides & Resources
Helpful guides from The Ultimate Homestead to improve your garden in Adams County.
Frequently Asked Questions
What planting zone is Adams County, ID?
Adams County is in USDA Hardiness Zone 6a. This zone classification determines which perennial plants survive winter and sets the baseline for frost timing across the county.
When is the last frost in Adams County, ID?
Based on 28 years of NOAA weather station data, the median last spring frost in Adams County falls around May 20. In 8 out of 10 years, last frost lands between April 14 and June 23 — a 69-day window of variability. Use June 23 as your conservative safe-to-plant date for frost-sensitive crops.
When is the first fall frost in Adams County, ID?
The median first fall frost in Adams County arrives around September 25. In cold years it can arrive as early as August 20; in mild years as late as October 25. Harvest or protect frost-sensitive crops — tomatoes, peppers, basil, squash — before this date.
How long is the growing season in Adams County?
Adams County has a frost-free growing season of approximately 128 days. Focus on short-season varieties and start warm-season crops indoors 6–8 weeks before last frost. Climate records show the growing season is trending shorter by about 2.06 days per decade.
What is the soil like in Adams County for gardening?
Adams County has predominantly Loam soil with a pH range of 6.3–8 and Excessively Drained drainage. Most vegetables and herbs grow well with standard composting and seasonal soil amendment.
What is grown commercially in Adams County?
Adams County has commercial agriculture that includes Potatoes, Hay, Wheat, Sugar Beets. These crops reflect the local climate and soil conditions — what succeeds commercially often translates well to home gardens in the same area.
Is Adams County a good location for home gardening?
Adams County scores 32/100 (Challenging) on our Microclimate Index, which combines frost reliability, drought pressure, soil challenge, elevation risk, and long-term climate trend. Gardening here benefits from close attention to frost timing and season extension due to the challenging microclimate factors.
Your Adams County Garden Planner — Free
A 22-page printable planner built for Adams County (Zone 6a). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.
The Gardener's Encyclopedia to Companion Planting
The pairings that make vegetables, herbs, and flowers grow better — and the ones that quietly wreck a bed.
- Proven pairings for 200+ vegetables, herbs, flowers, and fruits
- Full seed-starting + planting schedule with timing and spacing
- Bonus: square-foot gardening guide + printable seasonal planners
Seed Saving & Storage Guide
Most saved seeds go bad before next season. This shows exactly when to pick, how to dry, and where to store seeds from 200 plants so yours don't.
- 200 plants, step-by-step: life cycle, pollination type, isolation
- Exact temperature + humidity ranges that keep seeds viable
- Bonus: searchable Google Sheets tracker + custom GPT assistant
Composting Guide for Homesteaders
Turn kitchen scraps and yard waste into compost that actually feeds the garden — instead of a pile that smells, attracts pests, and never breaks down.
- 14 sections on composting methods, soil science, and troubleshooting
- The 7-step hot-compost system from start to finish
- Bonus tools: troubleshooting chart, safety guide, monitoring log