Valley County, ID — Planting Guide
What to do in May
Your garden in Valley County, Idaho is working on a schedule, even when you're not. Here's where you should be this May.
Looking ahead to June
- Transplants going out: kale, lettuce, and angelica
- Direct-sowing: basil, carrots, and cucumber
- First harvests: microgreens
- Fall sowing: carrots, kale, and lettuce
Valley County is in USDA Zone 5a. The average last spring frost is June 18 and the first fall frost is September 3, giving you a growing season of approximately 77 days.
At an elevation of 7,884 ft, Valley County receives approximately 17.8 in of rainfall annually. Summer highs average 83°F with winter lows around 9°F. The predominant soil type is Loam.
Based on 31 years of NOAA climate station data, the last frost date here varies by 42 days year to year — ranging from May 14 in warm years to June 26 in cold years. The growing season is trending shorter by about 3.88 days per decade. Valley County scores 28/100 (Challenging) on the Microclimate Index.
🌡️ Zone
5a (°F to °F min)
❄️ Last Frost
June 18
🍂 First Frost
September 3
📅 Growing Season
77 days
⛰️ Elevation
7,884 ft
🌧️ Annual Rainfall
17.8 in
Monthly Watering Calendar
When you'll need to water your garden — based on average monthly rainfall vs. the ~1 inch/week most gardens need.
View detailed monthly data
| Month | Avg Rainfall | Rainy Days | Extra Water Needed | Watering Effort |
|---|---|---|---|---|
| Jan | 1.2 in | 7 days | — | None |
| Feb | 1 in | 6 days | — | None |
| Mar | 1.7 in | 7 days | — | None |
| Apr | 2.2 in | 7 days | 2.1 in | High |
| May | 2.1 in | 8 days | 2.2 in | High |
| Jun | 1.1 in | 5 days | 3.2 in | Critical |
| Jul | 1.5 in | 5 days | 2.8 in | High |
| Aug | 1.9 in | 6 days | 2.4 in | High |
| Sep | 1.4 in | 5 days | 2.9 in | High |
| Oct | 1.5 in | 6 days | 2.8 in | High |
| Nov | 1.4 in | 5 days | — | None |
| Dec | 0.9 in | 6 days | — | None |
Annual total: 17.9 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.
Valley County Soil Profile
Soil Type
Loam
Soil pH
6.4-8.4
Drainage
Well Drained
Frost Risk Probability
Based on 31 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 26 | Oct 8 | 104 days |
| Cautious | Jun 22 | Sep 15 | 85 days |
| Average year | Jun 18 | Sep 3 | 77 days |
| Optimistic | Jun 11 | Aug 28 | 78 days |
| Aggressive (risky) | May 14 | Aug 16 | 94 days |
Not very — frost dates can vary by ±42 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 3.9 days per decade). Use the "Conservative" dates and choose fast-maturing varieties.
Gardening Difficulty Score
Valley County has challenging growing conditions. Season extension and careful variety selection are essential.
Local Gardening Help in Valley 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 Valley County's climate and soil.
County Extension Office
Valley 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 Valley County
Finding local nurseries & garden centers in Valley County
Why Buy Local
Local nurseries carry plants that are proven to grow in your area. Staff can give you advice specific to Valley 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 Valley County ID" or "garden center Valley 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 Valley County ID" or check your extension office and local parks department. Facebook groups like "Valley County Gardeners" or "Idaho Gardening" are also excellent for local advice and plant swaps.
Sunlight & Day Length
Monthly daylight hours and peak sun — critical for onion varieties, photoperiod-sensitive plants, and solar garden planning.
Longest Day
15.4 hours
Summer solstice daylight
Shortest Day
8.6 hours
Winter solstice daylight
Peak Sun Hours
11 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 | 6.2 hr | Short day |
| March | 11.6 hr | 6.8 hr | Short day |
| April | 13.3 hr | 7.9 hr | Neutral |
| May | 14.6 hr | 9.2 hr | Long day |
| June | 15.4 hr | 10.9 hr | Long day |
| July | 15.1 hr | 11 hr | Long day |
| August | 13.9 hr | 9.2 hr | Neutral |
| September | 12.3 hr | 8.5 hr | Neutral |
| October | 10.7 hr | 7 hr | Short day |
| November | 9.3 hr | 5.1 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 Calendar
Monthly soil temps tell you when to plant warm-season crops, and when your compost pile is actively working.
Plant Warm Crops When
Soil reaches 60°F+
Soil rarely reaches 60°F — use black plastic mulch to warm soil.
Best Month to Compost
Apr
Microbial activity peaks when soil is warm.
Active Composting
0 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 | -11°F | 1°F | ❄️ Dormant | ~36 weeks |
| Feb | -9°F | -1°F | ❄️ Dormant | ~36 weeks |
| Mar | 3°F | 4°F | ❄️ Dormant | ~36 weeks |
| Apr | 19°F | 15°F | ❄️ Dormant | ~36 weeks |
| May | 30°F | 26°F | ❄️ Dormant | ~36 weeks |
| Jun | 39°F | 36°F | ❄️ Dormant | ~36 weeks |
| Jul | 47°F | 42°F | 🐢 Slow | ~24 weeks |
| Aug | 49°F | 44°F | 🐢 Slow | ~24 weeks |
| Sep | 41°F | 39°F | 🐢 Slow | ~24 weeks |
| Oct | 27°F | 32°F | ❄️ Dormant | ~36 weeks |
| Nov | 15°F | 18°F | ❄️ Dormant | ~36 weeks |
| Dec | -3°F | 7°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 Valley County
Computed from local climate patterns — warmer, humid conditions increase pest generations and fungal disease risk.
Insect Pest Pressure
Low — basic prevention and occasional hand-picking.
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 |
| Cabbage worms | Moderate | Jun, Jul, Aug |
| Colorado potato beetle | Moderate | Jun, Jul |
| Flea beetles | Low | May, Jun, Jul |
| Slugs | Moderate | May, Jun, Jul, Aug, Sep |
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 Valley County
Cover crops protect bare soil, fix nitrogen, suppress weeds, and improve soil structure — with county-specific planting dates.
Spring Cover Crops (2 options) — Build soil before the main growing season
| Crop | Plant By | Terminate | N-Fixing | Soil Benefit |
|---|---|---|---|---|
| Buckwheat | Jun 22 | Jul 9 | — | Rapid growth, attracts pollinators, suppresses weeds |
| White clover | May 18 | Jun 25 | ✓ 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 30 | Aug 20 | — | Deep roots break compaction, attract pollinators and beneficial insects |
Fall Cover Crops (5 options) — Plant after harvest to protect soil over winter
| Crop | Plant By | Terminate | N-Fixing | Soil Benefit |
|---|---|---|---|---|
| Daikon radish | Jul 16 | May 28 | — | Deep taproot breaks compaction, excellent for clay soils |
| Hairy vetch | Jun 9 | Jun 4 | ✓ Yes | Excellent nitrogen fixer, good for depleted soils |
| Oats | Jul 27 | Jun 4 | — | Quick biomass, winterkills in cold zones — no spring tillage needed |
| Winter rye | Jun 3 | Jun 4 | — | Suppresses weeds, prevents erosion, breaks up compacted soil |
| Winter wheat | May 30 | May 28 | — | Erosion control, weed suppression, good biomass |
Wind & Microclimate
Wind dries soil, stresses plants, and affects frost patterns. Understanding your exposure helps with garden placement.
Seasonal Wind Speed
Spring: 14 mph Summer: 12 mph
Fall: 11 mph Winter: 16 mph
Prevailing wind: W. Windy area — plant a windbreak hedge on the W side of your garden.
Windbreak Benefit
7.1/10
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 1,546 ft of elevation range — cold air pools in low spots. Avoid planting frost-sensitive crops in valleys.
Rainwater Harvesting Potential
How much water you can collect, when to collect it, and what size system you need for your garden.
Annual Collection
8,921 gal
Per 1,000 sq ft of roof area (at 80% collection efficiency)
Recommended Setup
8 rain barrels (55 gal each)
For a typical 500 sq ft garden. Serious collectors: consider a 1,000 gal tank.
Legal Status
Unrestricted
Rainwater harvesting is fully legal in your state with no restrictions.
Best Collection Months
Mar, Apr, May, Aug
Highest rainfall months — your barrels will fill up quickly during these months.
Months to Draw From Storage
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 17.9 inches of rain per year
- A 1,000 sq ft roof can collect roughly 8,921 gallons annually
- Rainwater harvesting is fully legal in your state
- In your dry climate, every drop counts — consider a larger cistern system
- Position collection tanks in shade to reduce evaporation and algae growth
Soil & Growing Conditions in Valley County
Soil Type
Loam
Soil pH 6.4–8.4 · Moderately Well 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
77-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 24-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 Valley County
106 vegetables that grow well in Zone 5a with planting dates for Valley County.
Show all 106 vegetables with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Acorn Squash | May 14 | Jun 25 | Jul 2 | Sep 24 – Oct 29 | 80–100 |
| Amaranth | Apr 23 | Jun 25 | Jul 2 | Oct 1 – Nov 19 | 90–120 |
| Arugula | May 14 | Jun 4 | Jun 18 | Jul 23 – Sep 24 | 30–50 |
| Asparagus | — | — | Jul 2 | — | 730–1095 |
| Beets | — | Jun 4 | — | Jul 30 – Aug 27 | 50–70 |
| Belgian Endive | May 14 | Jun 4 | Jun 18 | Oct 8 – Dec 3 | 110–150 |
| Bitter Melon | Apr 23 | Jun 25 | Jul 2 | Sep 3 – Oct 15 | 60–90 |
| Black Beans | — | Jun 25 | — | Sep 24 – Nov 12 | 90–120 |
| Bok Choy | May 14 | Jun 4 | Jun 18 | Jul 30 – Sep 3 | 40–60 |
| Broccoli | May 14 | Jun 4 | Jun 18 | Aug 20 – Oct 1 | 60–90 |
| Broccoli Rabe | May 14 | Jun 4 | Jun 18 | Jul 30 – Sep 3 | 40–60 |
| Brussels Sprouts | May 14 | Jun 4 | Jun 18 | Sep 17 – Nov 12 | 90–130 |
| Butternut Squash | May 14 | Jun 25 | Jul 2 | Oct 1 – Nov 5 | 85–110 |
| Cabbage | May 14 | Jun 4 | Jun 18 | Aug 20 – Oct 15 | 60–100 |
| Calabash | Apr 23 | Jun 25 | Jul 2 | Sep 24 – Nov 19 | 80–120 |
| Carrots | — | Jun 4 | — | Aug 6 – Sep 10 | 60–80 |
| Cauliflower | May 14 | Jun 4 | Jun 18 | Aug 13 – Oct 15 | 55–100 |
| Celeriac | May 14 | Jun 4 | Jun 18 | Oct 1 – Nov 5 | 100–120 |
| Celery | May 14 | Jun 4 | Jun 18 | Sep 10 – Nov 5 | 80–120 |
| Celtuce | May 14 | Jun 4 | Jun 18 | Aug 20 – Oct 1 | 60–90 |
| Chard | May 14 | Jun 4 | Jun 18 | Aug 13 – Oct 1 | 50–60 |
| Chickpeas | May 14 | Jun 4 | Jun 18 | Sep 10 – Oct 22 | 80–110 |
| Chicory | May 14 | Jun 4 | Jun 18 | Aug 20 – Oct 1 | 60–85 |
| Chinese Cabbage | May 14 | Jun 4 | Jun 18 | Aug 13 – Sep 10 | 50–70 |
| Christmas Lima Beans | Apr 23 | Jun 25 | Jul 2 | Sep 24 – Oct 29 | 80–100 |
| Collard Greens | May 14 | Jun 4 | Jun 18 | Aug 13 – Oct 15 | 55–75 |
| Corn | — | Jun 25 | — | Aug 27 – Oct 22 | 60–100 |
| Cowpeas | — | Jun 25 | — | Aug 27 – Oct 8 | 60–90 |
| Cress | May 14 | Jun 4 | Jun 18 | Jul 2 – Jul 23 | 14–21 |
| Crookneck Squash | May 14 | Jun 25 | Jul 2 | Aug 20 – Sep 17 | 45–60 |
| Crosne | — | Jun 4 | — | Nov 5 – Nov 19 | 150–200 |
| Cucumber | May 14 | Jun 25 | Jul 2 | Aug 27 – Oct 22 | 50–70 |
| Daikon | — | Jun 4 | — | Jul 30 – Aug 27 | 50–70 |
| Delicata Squash | May 14 | Jun 25 | Jul 2 | Sep 24 – Oct 29 | 80–100 |
| Edamame | — | Jun 25 | — | Sep 10 – Oct 22 | 75–100 |
| Eggplant | Apr 9 | Jun 25 | Jul 2 | Sep 10 – Nov 12 | 65–85 |
| Endive | May 14 | Jun 4 | Jun 18 | Aug 6 – Sep 10 | 45–65 |
| Escarole | May 14 | Jun 4 | Jun 18 | Aug 13 – Sep 10 | 50–70 |
| Fava Beans | May 14 | Jun 4 | Jun 18 | Sep 3 – Oct 15 | 75–100 |
| Fennel | Apr 23 | Jun 25 | Jul 2 | Sep 3 – Oct 15 | 60–90 |
| Garlic | — | — | — | — | 90–240 |
| Green Beans | — | Jun 25 | — | Aug 20 – Oct 15 | 50–65 |
| Horseradish | — | — | Jul 2 | Nov 5 – Dec 17 | 120–180 |
| Hot Peppers | Apr 9 | Jun 25 | Jul 2 | Sep 10 – Dec 17 | 70–120 |
| Hubbard Squash | May 14 | Jun 25 | Jul 2 | Oct 15 – Nov 19 | 100–120 |
| Kabocha | May 14 | Jun 25 | Jul 2 | Oct 1 – Oct 29 | 85–100 |
| Kai Lan | May 14 | Jun 4 | Jun 18 | Aug 6 – Sep 3 | 45–60 |
| Kale | May 14 | Jun 4 | Jun 18 | Aug 13 – Oct 8 | 50–70 |
| Kidney Beans | — | Jun 25 | — | Sep 24 – Oct 29 | 85–110 |
| Kohlrabi | May 14 | Jun 4 | Jun 18 | Aug 6 – Sep 10 | 45–65 |
| Komatsuna | May 14 | Jun 4 | Jun 18 | Jul 23 – Aug 27 | 35–50 |
| Leeks | May 14 | Jun 4 | Jun 18 | Sep 17 – Dec 3 | 90–150 |
| Lentils | May 14 | Jun 4 | Jun 18 | Sep 10 – Oct 22 | 80–110 |
| Lettuce | May 14 | Jun 4 | Jun 18 | Jul 23 – Oct 1 | 30–60 |
| Lima Beans | — | Jun 25 | — | Aug 27 – Oct 8 | 60–90 |
| Mache | May 14 | Jun 4 | Jun 18 | Jul 30 – Sep 3 | 40–60 |
| Melon | May 14 | Jun 25 | Jul 2 | Sep 10 – Oct 29 | 70–100 |
| Microgreens | May 14 | Jun 4 | Jun 18 | Jun 25 – Jul 23 | 7–21 |
| Mitsuba | May 14 | Jun 4 | Jun 11 | Aug 6 – Oct 1 | 50–70 |
| Mizuna | May 14 | Jun 4 | Jun 18 | Jul 23 – Aug 20 | 30–45 |
| Mustard Greens | May 14 | Jun 4 | Jun 18 | Jul 23 – Sep 24 | 30–50 |
| Napa Cabbage | May 14 | Jun 4 | Jun 18 | Aug 13 – Sep 17 | 55–75 |
| New Zealand Spinach | Apr 23 | Jun 25 | Jul 2 | Aug 27 – Sep 24 | 55–70 |
| Okra | Apr 23 | Jun 25 | Jul 2 | Aug 27 – Oct 22 | 50–65 |
| Onion | May 14 | Jun 4 | Jun 18 | Sep 17 – Nov 5 | 90–120 |
| Pac Choi | May 14 | Jun 4 | Jun 18 | Jul 30 – Aug 27 | 40–55 |
| Parsnip | — | Jun 4 | — | Sep 17 – Oct 29 | 100–130 |
| Patty Pan Squash | May 14 | Jun 25 | Jul 2 | Aug 20 – Sep 17 | 45–60 |
| Peas | May 14 | Jun 4 | Jun 18 | Aug 13 – Oct 8 | 55–70 |
| Peppers | Apr 9 | Jun 25 | Jul 2 | Sep 3 – Nov 12 | 60–90 |
| Pole Beans | Apr 23 | Jun 25 | Jul 2 | Aug 27 – Oct 22 | 55–70 |
| Potatoes | Apr 23 | Jun 25 | Jul 2 | Sep 10 – Nov 19 | 70–120 |
| Pumpkin | May 14 | Jun 25 | Jul 2 | Oct 1 – Nov 19 | 85–120 |
| Purslane | May 14 | Jun 4 | Jun 18 | Jul 30 – Sep 3 | 40–60 |
| Radicchio | May 14 | Jun 4 | Jun 18 | Aug 20 – Sep 24 | 60–80 |
| Radish | — | Jun 4 | — | Jul 2 – Jul 23 | 22–35 |
| Rhubarb | — | — | Jul 9 | — | 365–730 |
| Romanesco | May 14 | Jun 4 | Jun 18 | Sep 3 – Oct 15 | 75–100 |
| Rutabaga | — | Jun 4 | — | Aug 27 – Oct 1 | 80–100 |
| Salsify | — | Jun 4 | — | Sep 17 – Oct 29 | 100–130 |
| Savoy Cabbage | May 14 | Jun 4 | Jun 18 | Aug 27 – Oct 22 | 70–110 |
| Scallions | May 14 | Jun 4 | Jun 18 | Aug 13 – Sep 10 | 50–70 |
| Scarlet Runner Beans | Apr 23 | Jun 25 | Jul 2 | Sep 3 – Oct 8 | 60–80 |
| Shallot | May 14 | Jun 4 | Jun 18 | Sep 17 – Nov 5 | 90–120 |
| Shiso | Apr 30 | Jun 25 | Jul 2 | Aug 27 – Oct 22 | 50–70 |
| Snap Peas | Apr 23 | Jun 25 | Jul 2 | Aug 27 – Oct 22 | 55–70 |
| Snow Peas | May 14 | Jun 4 | Jun 18 | Aug 13 – Oct 8 | 50–65 |
| Soybeans | — | Jun 25 | — | Sep 17 – Nov 12 | 80–120 |
| Spaghetti Squash | May 14 | Jun 25 | Jul 2 | Oct 1 – Oct 29 | 85–100 |
| Spinach | May 14 | Jun 4 | Jun 18 | Jul 23 – Sep 24 | 35–50 |
| Squash (Summer) | May 14 | Jun 25 | Jul 2 | Aug 20 – Oct 22 | 45–65 |
| Squash (Winter) | May 14 | Jun 25 | Jul 2 | Sep 24 – Nov 19 | 80–120 |
| Sunchoke | — | — | Jul 2 | Oct 22 – Dec 17 | 110–150 |
| Sunflower | Apr 23 | Jun 25 | Jul 2 | Sep 10 – Oct 29 | 70–100 |
| Sweet Corn | — | Jun 25 | — | Aug 27 – Oct 8 | 60–90 |
| Sweet Potatoes | Apr 23 | Jun 25 | Jul 2 | Oct 1 – Nov 19 | 90–120 |
| Tatsoi | May 14 | Jun 4 | Jun 18 | Jul 23 – Aug 27 | 35–50 |
| Tomatillo | Apr 23 | Jun 25 | Jul 2 | Sep 3 – Nov 12 | 60–85 |
| Tomatoes | Apr 23 | Jun 25 | Jul 2 | Sep 3 – Nov 12 | 60–85 |
| Turnip | — | Jun 4 | — | Jul 16 – Aug 20 | 40–60 |
| Watercress | May 14 | Jun 4 | Jun 18 | Jul 30 – Sep 3 | 40–60 |
| Watermelon | May 14 | Jun 25 | Jul 2 | Sep 10 – Oct 29 | 70–100 |
| Wax Beans | — | Jun 25 | — | Aug 20 – Oct 15 | 50–65 |
| Winter Melon | Apr 23 | Jun 25 | Jul 2 | Oct 1 – Nov 19 | 90–120 |
| Yard Long Beans | Apr 23 | Jun 25 | Jul 2 | Aug 27 – Oct 8 | 55–80 |
| Zucchini | May 14 | Jun 25 | Jul 2 | Aug 20 – Oct 15 | 45–60 |
🍓 Fruits to Grow in Valley County
27 fruits that grow well in Zone 5a with planting dates for Valley County.
Show all 27 fruits with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Alpine Strawberries | — | — | Jul 9 | Oct 8 – Dec 24 | 90–180 |
| Aronia | — | — | Jul 9 | — | 730–1095 |
| Blackberries | — | — | Jul 9 | — | 365–730 |
| Blueberries | — | — | Jul 9 | — | 730–1095 |
| Boysenberries | — | — | Jul 9 | — | 365–730 |
| Cantaloupe | — | — | Jul 9 | Sep 17 – Oct 22 | 70–90 |
| Che Fruit | — | — | Jul 9 | — | 1095–1825 |
| Cranberries | — | — | Jul 9 | — | 730–1095 |
| Currants | — | — | Jul 9 | — | 730–1095 |
| Elderberries | — | — | Jul 9 | — | 730–1095 |
| Goji Berries | — | — | Jul 9 | — | 730–1095 |
| Gooseberries | — | — | Jul 9 | — | 730–1095 |
| Grapes | — | — | Jul 9 | — | 730–1095 |
| Ground Cherry | — | — | Jul 9 | Sep 17 – Nov 12 | 65–80 |
| Hardy Kiwi | — | — | Jul 9 | — | 1095–1825 |
| Haskaps | — | — | Jul 9 | — | 730–1095 |
| Honeydew | — | — | Jul 9 | Oct 1 – Nov 12 | 80–110 |
| Jostaberry | — | — | Jul 9 | — | 730–1095 |
| Lingonberries | — | — | Jul 9 | — | 730–1095 |
| Medlar | — | — | Jul 9 | — | 1095–1825 |
| Mulberries | — | — | Jul 9 | — | 730–1825 |
| Pawpaw | — | — | Jul 9 | — | 1095–2555 |
| Persimmon | — | — | Jul 9 | — | 1095–2555 |
| Quince | — | — | Jul 9 | — | 1095–1825 |
| Raspberries | — | — | Jul 9 | — | 365–730 |
| Serviceberries | — | — | Jul 9 | — | 730–1095 |
| Strawberries | — | — | Jul 9 | Oct 8 – Dec 24 | 90–365 |
🌿 Herbs to Grow in Valley County
37 herbs that grow well in Zone 5a with planting dates for Valley County.
Show all 37 herbs with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Angelica | May 14 | Jun 4 | Jun 11 | — | 365–730 |
| Anise | May 14 | Jun 4 | Jun 11 | Sep 10 – Nov 26 | 90–120 |
| Basil | Apr 30 | Jun 25 | Jul 2 | Aug 27 – Oct 29 | 50–75 |
| Bee Balm | — | — | Jun 25 | Sep 24 – Dec 10 | 90–120 |
| Borage | May 14 | Jun 4 | Jun 11 | Aug 6 – Sep 24 | 50–60 |
| Caraway | May 14 | Jun 4 | Jun 11 | — | 365–450 |
| Catnip | — | — | Jun 25 | Aug 27 – Oct 29 | 60–80 |
| Chamomile | May 14 | Jun 4 | Jun 11 | Aug 13 – Oct 22 | 60–90 |
| Chervil | May 14 | Jun 4 | Jun 11 | Jul 23 – Sep 24 | 40–60 |
| Chives | — | — | Jun 25 | Aug 27 – Nov 5 | 60–90 |
| Cilantro | May 14 | Jun 4 | Jun 11 | Jul 23 – Sep 24 | 40–60 |
| Comfrey | — | — | Jun 25 | Aug 27 – Nov 5 | 60–90 |
| Cumin | May 14 | Jun 4 | Jun 11 | Sep 24 – Nov 26 | 100–120 |
| Dill | May 14 | Jun 4 | Jun 11 | Jul 23 – Sep 24 | 40–60 |
| Echinacea | — | — | Jun 25 | Oct 29 – Dec 10 | 120–180 |
| Epazote | Apr 30 | Jun 25 | Jul 2 | Aug 20 – Oct 15 | 45–60 |
| Fennel (herb) | May 14 | Jun 4 | Jun 11 | Aug 13 – Oct 22 | 60–90 |
| Feverfew | — | — | Jun 25 | Sep 24 – Dec 10 | 90–120 |
| Garlic Chives | — | — | Jun 25 | Aug 27 – Nov 5 | 60–90 |
| Horehound | — | — | Jun 25 | Sep 10 – Nov 5 | 75–90 |
| Hyssop | — | — | Jun 25 | Sep 3 – Nov 5 | 70–90 |
| Lavender | — | — | Jun 25 | Sep 24 – Dec 10 | 90–200 |
| Lemon Balm | — | — | Jun 25 | Aug 27 – Oct 15 | 60–70 |
| Lemon Thyme | — | — | Jun 25 | Sep 3 – Nov 5 | 70–90 |
| Lovage | — | — | Jun 25 | Sep 3 – Nov 5 | 70–90 |
| Mint | — | — | Jun 25 | Aug 27 – Nov 5 | 60–90 |
| Oregano | — | — | Jun 25 | Aug 27 – Nov 5 | 60–90 |
| Parsley | May 14 | Jun 4 | Jun 11 | Aug 13 – Oct 15 | 60–80 |
| Rue | — | — | Jun 25 | Sep 3 – Nov 5 | 70–90 |
| Sage | — | — | Jun 25 | Sep 10 – Nov 5 | 75–90 |
| Savory | — | — | Jun 25 | Aug 20 – Oct 15 | 50–70 |
| Sorrel | May 14 | Jun 4 | Jun 11 | Jul 23 – Sep 24 | 40–60 |
| Tarragon | — | — | Jun 25 | Aug 27 – Nov 5 | 60–90 |
| Thai Basil | Apr 30 | Jun 25 | Jul 2 | Aug 27 – Oct 29 | 50–75 |
| Thyme | — | — | Jun 25 | Sep 3 – Nov 5 | 70–90 |
| Valerian | — | — | Jun 25 | Oct 29 – Dec 10 | 120–180 |
| Yarrow | — | — | Jun 25 | Sep 24 – Dec 10 | 90–120 |
Monthly Planting Guide for Valley County
Gardening Guides & Resources
Helpful guides from The Ultimate Homestead to improve your garden in Valley County.
Frequently Asked Questions
What planting zone is Valley County, ID?
Valley County is in USDA Hardiness Zone 5a. 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 Valley County, ID?
Based on 31 years of NOAA weather station data, the median last spring frost in Valley County falls around June 18. In 8 out of 10 years, last frost lands between May 14 and June 26 — a 42-day window of variability. Use June 26 as your conservative safe-to-plant date for frost-sensitive crops.
When is the first fall frost in Valley County, ID?
The median first fall frost in Valley County arrives around September 3. In cold years it can arrive as early as August 16; in mild years as late as October 8. Harvest or protect frost-sensitive crops — tomatoes, peppers, basil, squash — before this date.
How long is the growing season in Valley County?
Valley County has a frost-free growing season of approximately 77 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 3.88 days per decade.
What is the soil like in Valley County for gardening?
Valley County has predominantly Loam soil with a pH range of 6.4–8.4 and Moderately Well Drained drainage. Most vegetables and herbs grow well with standard composting and seasonal soil amendment.
What is grown commercially in Valley County?
Valley County has commercial agriculture that includes Potatoes, Hay, Wheat, Barley, Dairy. These crops reflect the local climate and soil conditions — what succeeds commercially often translates well to home gardens in the same area.
Is Valley County a good location for home gardening?
Valley County scores 28/100 (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 Valley County Garden Planner — Free
A 24-page printable planner built for Valley County (Zone 5a). 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