Fremont County, CO — Planting Guide
This month in Fremont County, Colorado
July is a pivotal month for Fremont County, Colorado gardens. Focus on these tasks first and you'll set up the rest of the season for success.
-
Start basil, pole beans, and thai basil indoors
Bottom-water once the first true leaves appear — it keeps stems dry and knocks back damping-off.
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It's harvest week for carrots, green beans, and kale
Don't tug. Use scissors or pruners for clean cuts — torn stems invite disease.
-
Direct-sow carrots, kale, and lettuce for cool weather
Keep young seedlings shaded and moist in summer heat. A row of taller crops works as natural shade.
Get ahead of August
- Starting indoors: peppers, begonias, and eggplant
- First harvests: basil, carrots, and cucumber
- Fall sowing: alliums, bachelor's button, and crocus
Fremont County is in USDA Zone 6a. The average last spring frost is May 23 and the first fall frost is September 25, giving you a growing season of approximately 125 days.
At an elevation of 6,575 ft, Fremont County receives approximately 18.5 in of rainfall annually. Summer highs average 84°F with winter lows around 13°F. The predominant soil type is Loam.
Based on 31 years of NOAA climate station data, the last frost date here varies by 47 days year to year — ranging from April 28 in warm years to June 15 in cold years. The growing season is trending shorter by about 3.45 days per decade. Fremont County scores 28/100 (Challenging) on the Microclimate Index.
🌡️ Zone
6a (-10°F to -5°F min)
❄️ Last Frost
May 23
🍂 First Frost
September 25
📅 Growing Season
125 days
⛰️ Elevation
6,575 ft
🌧️ Annual Rainfall
18.5 in
Monthly Watering Calendar for Fremont County
When you'll need to water your garden — based on average monthly rainfall vs. the ~1 inch/week most gardens need.
Quick context: In humid climates, watering is usually about timing (morning, not evening, to prevent disease) more than volume. In dry climates, it's about depth (water deep, less often) more than frequency. Fremont County's 19" annual tells you which side you're on.
View detailed monthly data
| Month | Avg Rainfall | Rainy Days | Extra Water Needed | Watering Effort |
|---|---|---|---|---|
| Jan | 1.5 in | 7 days | — | None |
| Feb | 1.1 in | 6 days | — | None |
| Mar | 1.6 in | 8 days | — | None |
| Apr | 2.2 in | 8 days | 2.1 in | High |
| May | 2 in | 7 days | 2.3 in | High |
| Jun | 1.5 in | 5 days | 2.8 in | High |
| Jul | 1.4 in | 6 days | 2.9 in | High |
| Aug | 1.7 in | 6 days | 2.6 in | High |
| Sep | 1.5 in | 6 days | 2.8 in | High |
| Oct | 1.7 in | 6 days | 2.6 in | High |
| Nov | 1.4 in | 5 days | — | None |
| Dec | 1 in | 7 days | — | None |
Annual total: 18.6 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.
Fremont County Soil Profile
Soil Type
Loam
Soil pH
6.7-8.3
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 15 | Oct 13 | 120 days |
| Cautious | Jun 4 | Oct 6 | 124 days |
| Average year | May 23 | Sep 25 | 125 days |
| Optimistic | May 11 | Sep 17 | 129 days |
| Aggressive (risky) | Apr 28 | Sep 8 | 133 days |
Not very — frost dates can vary by ±47 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 3.5 days per decade). Use the "Conservative" dates and choose fast-maturing varieties.
Gardening Difficulty Score
Fremont County has challenging growing conditions. Season extension and careful variety selection are essential.
Local Gardening Help in Fremont 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 Fremont County's climate and soil.
County Extension Office
Fremont County Colorado State University Extension Extension Office
Phone: 970-491-6281
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 Fremont County
Finding local nurseries & garden centers in Fremont County
Why Buy Local
Local nurseries carry plants that are proven to grow in your area. Staff can give you advice specific to Fremont 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 Fremont County CO" or "garden center Fremont 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 Fremont County CO" or check your extension office and local parks department. Facebook groups like "Fremont County Gardeners" or "Colorado 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 Fremont County
Monthly daylight hours and peak sun — critical for onion varieties, photoperiod-sensitive plants, and solar garden planning.
The practical takeaway: A 14-hour day in June produces dramatically more photosynthesis than a 10-hour day in November. Fremont County's seasonal swing determines which crops can pack growth into spring vs. limp through fall.
Longest Day
14.7 hours
Summer solstice daylight
Shortest Day
9.3 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 | 9.6 hr | 5.5 hr | Short day |
| February | 10.6 hr | 6.4 hr | Short day |
| March | 11.7 hr | 6.9 hr | Short day |
| April | 13 hr | 7.7 hr | Neutral |
| May | 14.1 hr | 8.6 hr | Long day |
| June | 14.7 hr | 11 hr | Long day |
| July | 14.4 hr | 10.3 hr | Long day |
| August | 13.5 hr | 9.5 hr | Neutral |
| September | 12.2 hr | 8.3 hr | Neutral |
| October | 11 hr | 7.1 hr | Short day |
| November | 9.9 hr | 5.9 hr | Short day |
| December | 9.3 hr | 5.2 hr | Short day |
Peak sun hours factor in typical cloud cover — use these for solar panel and shade-planning calculations.
Soil Temperature & Composting in Fremont County
Monthly soil temps tell you when to plant warm-season crops, and when your compost pile is actively working.
What this means for you: Soil temperature predicts plant emergence better than calendar dates. Fremont County's spring soil warm-up curve tells you which weeks are safe for direct-sow beans, cucumbers, squash, and corn.
Plant Warm Crops When
Soil reaches 60°F+
Soil rarely reaches 60°F — use black plastic mulch to warm soil.
Best Month to Compost
Jun
Microbial activity peaks when soil is warm.
Active Composting
4 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 | 5°F | 14°F | ❄️ Dormant | ~36 weeks |
| Feb | 4°F | 12°F | ❄️ Dormant | ~36 weeks |
| Mar | 12°F | 17°F | ❄️ Dormant | ~36 weeks |
| Apr | 27°F | 26°F | ❄️ Dormant | ~36 weeks |
| May | 38°F | 36°F | ❄️ Dormant | ~36 weeks |
| Jun | 52°F | 45°F | ♻️ Active | ~14 weeks |
| Jul | 56°F | 53°F | ♻️ Active | ~14 weeks |
| Aug | 57°F | 54°F | ♻️ Active | ~14 weeks |
| Sep | 51°F | 50°F | ♻️ Active | ~14 weeks |
| Oct | 38°F | 41°F | ❄️ Dormant | ~36 weeks |
| Nov | 25°F | 30°F | ❄️ Dormant | ~36 weeks |
| Dec | 9°F | 20°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 Fremont County
Computed from local climate patterns — warmer, humid conditions increase pest generations and fungal disease risk.
Why this matters: Pest score isn't pass/fail. It's a planning input. Higher scores mean: more compost (resilient plants), wider spacing (air circulation), resistant varieties (built-in defense), and inspection (catch issues at egg stage).
Insect Pest Pressure
Moderate — common pests appear but manageable with monitoring.
Disease Risk
Low disease risk — dry conditions reduce fungal problems.
Seasonal Risk
View 6 common pests in your area
| Pest | Risk Level | Peak Months |
|---|---|---|
| Aphids | Moderate | May, Jun, Jul, Aug |
| Japanese beetles | Moderate | Jun, Jul, Aug |
| Squash bugs | Low | Jun, Jul, Aug |
| Tomato hornworms | Moderate | Jul, Aug |
| Cabbage loopers | Moderate | May, Jun, Jul, Aug |
| Slugs | Low | Apr, May, Jun |
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 Fremont County
Cover crops protect bare soil, fix nitrogen, suppress weeds, and improve soil structure — with planting dates calibrated for your area.
What this means for you: In Fremont County, cover crops also crowd out weeds. The denser the cover, the less weed pressure next season. Pays for itself in saved weeding time.
Spring Cover Crops (3 options) — Build soil before the main growing season
| Crop | Plant By | Terminate | N-Fixing | Soil Benefit |
|---|---|---|---|---|
| Buckwheat | May 27 | Jul 24 | — | Rapid growth, attracts pollinators, suppresses weeds |
| Sorghum-sudan grass | May 27 | Jul 17 | — | Massive biomass, breaks compaction, suppresses nematodes |
| White clover | Apr 26 | Jul 24 | ✓ 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 10 | Aug 28 | — | 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 29 | May 2 | ✓ Yes | Fixes nitrogen, good for heavy clay soils |
| Daikon radish | Aug 11 | May 9 | — | Deep taproot breaks compaction, excellent for clay soils |
| Hairy vetch | Jul 3 | May 2 | ✓ Yes | Excellent nitrogen fixer, good for depleted soils |
| Oats | Aug 13 | May 9 | — | Quick biomass, winterkills in cold zones — no spring tillage needed |
| Winter rye | Jul 6 | May 9 | — | Suppresses weeds, prevents erosion, breaks up compacted soil |
| Winter wheat | Jun 19 | May 9 | — | Erosion control, weed suppression, good biomass |
Wind & Microclimate in Fremont County
For new gardeners: Plants lose water through tiny leaf pores. Wind accelerates that loss dramatically — a 15 mph day can double a calm day's irrigation need. Fremont County's 11.9 mph background wind is something to design around, not against. Windbreaks made of perennial shrubs save more water than any drip system.
Wind dries soil, stresses plants, and affects frost patterns. Understanding your exposure helps with garden placement.
Seasonal Wind Speed
Spring: 16 mph Summer: 12 mph
Fall: 12 mph Winter: 16 mph
Prevailing wind: W. Windy area — plant a windbreak hedge on the W side of your garden.
Windbreak Benefit
6.8/10
Moderately beneficial — a simple fence or trellis can protect delicate crops from wind stress.
Frost Pocket Risk
High
Hilly terrain with 2,733 ft of elevation range — cold air pools in low spots. Avoid planting frost-sensitive crops in valleys.
Rainwater Harvesting in Fremont County
How much water you can collect, when to collect it, and what size system you need for your garden.
What this means for you: A gravity-fed rain barrel ($75) is the easy entry. A larger cistern ($500-1500) covers a whole growing season. Fremont County's 19" annual rainfall determines whether the larger system is overkill or essential.
Annual Collection
9,270 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 1,750 gal tank.
Legal Status
Limited
Your state has quantity limits on rainwater collection — check local regulations before installing large systems.
Best Collection Months
Apr, May, Aug, Oct
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 18.6 inches of rain per year
- A 1,000 sq ft roof can collect roughly 9,270 gallons annually
- Check CO state regulations — rainwater harvesting has quantity limits
- 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 Fremont County
Soil Type
Loam
Soil pH 6.7–8.3 · Well Drained drainage
Good candidate for raised beds to maximise drainage and extend the season.
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
125-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 Fremont County
107 vegetables that grow well in Zone 6a with planting dates for Fremont County.
Show all 107 vegetables with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Fall Plant | Harvest | Days to Maturity |
|---|---|---|---|---|---|---|
| Acorn Squash | Apr 18 | May 30 | Jun 6 | — | Aug 29 – Oct 3 | 80–100 |
| Amaranth | Mar 28 | May 30 | Jun 6 | — | Sep 5 – Oct 24 | 90–120 |
| Arugula | Apr 18 | May 9 | May 23 | Jul 17 | Jun 27 – Aug 29 | 30–50 |
| Asparagus | — | — | Jun 6 | — | — | 730–1095 |
| Beets | — | May 9 | — | Jul 17 | Jul 4 – Aug 1 | 50–70 |
| Belgian Endive | Apr 18 | May 9 | May 23 | Jul 17 | Sep 12 – Nov 7 | 110–150 |
| Bitter Melon | Mar 28 | May 30 | Jun 6 | — | Aug 8 – Sep 19 | 60–90 |
| Black Beans | — | May 30 | — | — | Aug 29 – Oct 17 | 90–120 |
| Bok Choy | Apr 18 | May 9 | May 23 | Jul 17 | Jul 4 – Aug 8 | 40–60 |
| Broccoli | Apr 18 | May 9 | May 23 | Jul 17 | Jul 25 – Sep 5 | 60–90 |
| Broccoli Rabe | Apr 18 | May 9 | May 23 | Jul 17 | Jul 4 – Aug 8 | 40–60 |
| Brussels Sprouts | Apr 18 | May 9 | May 23 | Jul 17 | Aug 22 – Oct 17 | 90–130 |
| Butternut Squash | Apr 18 | May 30 | Jun 6 | — | Sep 5 – Oct 10 | 85–110 |
| Cabbage | Apr 18 | May 9 | May 23 | Jul 17 | Jul 25 – Sep 19 | 60–100 |
| Calabash | Mar 28 | May 30 | Jun 6 | — | Aug 29 – Oct 24 | 80–120 |
| Carrots | — | May 9 | — | Jul 17 | Jul 11 – Aug 15 | 60–80 |
| Cauliflower | Apr 18 | May 9 | May 23 | Jul 17 | Jul 18 – Sep 19 | 55–100 |
| Celeriac | Apr 18 | May 9 | May 23 | Jul 17 | Sep 5 – Oct 10 | 100–120 |
| Celery | Apr 18 | May 9 | May 23 | Jul 17 | Aug 15 – Oct 10 | 80–120 |
| Celtuce | Apr 18 | May 9 | May 23 | Jul 17 | Jul 25 – Sep 5 | 60–90 |
| Chard | Apr 18 | May 9 | May 23 | Jul 17 | Jul 18 – Sep 5 | 50–60 |
| Chickpeas | Apr 18 | May 9 | May 23 | Jul 17 | Aug 15 – Sep 26 | 80–110 |
| Chicory | Apr 18 | May 9 | May 23 | Jul 17 | Jul 25 – Sep 5 | 60–85 |
| Chinese Cabbage | Apr 18 | May 9 | May 23 | Jul 17 | Jul 18 – Aug 15 | 50–70 |
| Christmas Lima Beans | Mar 28 | May 30 | Jun 6 | — | Aug 29 – Oct 3 | 80–100 |
| Collard Greens | Apr 18 | May 9 | May 23 | Jul 17 | Jul 18 – Sep 19 | 55–75 |
| Corn | — | May 30 | — | — | Aug 1 – Sep 26 | 60–100 |
| Cowpeas | — | May 30 | — | — | Aug 1 – Sep 12 | 60–90 |
| Cress | Apr 18 | May 9 | May 23 | Jul 17 | Jun 6 – Jun 27 | 14–21 |
| Crookneck Squash | Apr 18 | May 30 | Jun 6 | — | Jul 25 – Aug 22 | 45–60 |
| Crosne | — | May 9 | — | Jul 17 | Oct 10 – Nov 21 | 150–200 |
| Cucumber | Apr 18 | May 30 | Jun 6 | — | Aug 1 – Sep 26 | 50–70 |
| Daikon | — | May 9 | — | Jul 17 | Jul 4 – Aug 1 | 50–70 |
| Delicata Squash | Apr 18 | May 30 | Jun 6 | — | Aug 29 – Oct 3 | 80–100 |
| Edamame | — | May 30 | — | — | Aug 15 – Sep 26 | 75–100 |
| Eggplant | Mar 14 | May 30 | Jun 6 | — | Aug 15 – Oct 17 | 65–85 |
| Endive | Apr 18 | May 9 | May 23 | Jul 17 | Jul 11 – Aug 15 | 45–65 |
| Escarole | Apr 18 | May 9 | May 23 | Jul 17 | Jul 18 – Aug 15 | 50–70 |
| Fava Beans | Apr 18 | May 9 | May 23 | Jul 17 | Aug 8 – Sep 19 | 75–100 |
| Fennel | Mar 28 | May 30 | Jun 6 | — | Aug 8 – Sep 19 | 60–90 |
| Garlic | — | — | — | Aug 14 | Nov 13 – Feb 26 | 90–240 |
| Green Beans | — | May 30 | — | — | Jul 25 – Sep 19 | 50–65 |
| Horseradish | — | — | Jun 6 | — | Oct 10 – Dec 19 | 120–180 |
| Hot Peppers | Mar 14 | May 30 | Jun 6 | — | Aug 15 – Nov 21 | 70–120 |
| Hubbard Squash | Apr 18 | May 30 | Jun 6 | — | Sep 19 – Oct 24 | 100–120 |
| Kabocha | Apr 18 | May 30 | Jun 6 | — | Sep 5 – Oct 3 | 85–100 |
| Kai Lan | Apr 18 | May 9 | May 23 | Jul 17 | Jul 11 – Aug 8 | 45–60 |
| Kale | Apr 18 | May 9 | May 23 | Jul 17 | Jul 18 – Sep 12 | 50–70 |
| Kidney Beans | — | May 30 | — | — | Aug 29 – Oct 3 | 85–110 |
| Kohlrabi | Apr 18 | May 9 | May 23 | Jul 17 | Jul 11 – Aug 15 | 45–65 |
| Komatsuna | Apr 18 | May 9 | May 23 | Jul 17 | Jun 27 – Aug 1 | 35–50 |
| Leeks | Apr 18 | May 9 | May 23 | Jul 17 | Aug 22 – Nov 7 | 90–150 |
| Lentils | Apr 18 | May 9 | May 23 | Jul 17 | Aug 15 – Sep 26 | 80–110 |
| Lettuce | Apr 18 | May 9 | May 23 | Jul 17 | Jun 27 – Sep 5 | 30–60 |
| Lima Beans | — | May 30 | — | — | Aug 1 – Sep 12 | 60–90 |
| Loofah | Mar 28 | May 30 | Jun 6 | — | Sep 19 – Nov 21 | 100–150 |
| Luffa | Mar 28 | May 30 | Jun 6 | — | Sep 5 – Nov 21 | 90–150 |
| Mache | Apr 18 | May 9 | May 23 | Jul 17 | Jul 4 – Aug 8 | 40–60 |
| Melon | Apr 18 | May 30 | Jun 6 | — | Aug 15 – Oct 3 | 70–100 |
| Microgreens | Apr 18 | May 9 | May 23 | Jul 17 | May 30 – Jun 27 | 7–21 |
| Mitsuba | Apr 18 | May 9 | May 16 | Jul 17 | Jul 11 – Sep 5 | 50–70 |
| Mizuna | Apr 18 | May 9 | May 23 | Jul 17 | Jun 27 – Jul 25 | 30–45 |
| Mustard Greens | Apr 18 | May 9 | May 23 | Jul 17 | Jun 27 – Aug 29 | 30–50 |
| Napa Cabbage | Apr 18 | May 9 | May 23 | Jul 17 | Jul 18 – Aug 22 | 55–75 |
| New Zealand Spinach | Mar 28 | May 30 | Jun 6 | — | Aug 1 – Aug 29 | 55–70 |
| Okra | Mar 28 | May 30 | Jun 6 | — | Aug 1 – Sep 26 | 50–65 |
| Onion | Apr 18 | May 9 | May 23 | Jul 17 | Aug 22 – Oct 10 | 90–120 |
| Pac Choi | Apr 18 | May 9 | May 23 | Jul 17 | Jul 4 – Aug 1 | 40–55 |
| Parsnip | — | May 9 | — | Jul 17 | Aug 22 – Oct 3 | 100–130 |
| Patty Pan Squash | Apr 18 | May 30 | Jun 6 | — | Jul 25 – Aug 22 | 45–60 |
| Peas | Apr 18 | May 9 | May 23 | Jul 17 | Jul 18 – Sep 12 | 55–70 |
| Peppers | Mar 14 | May 30 | Jun 6 | — | Aug 8 – Oct 17 | 60–90 |
| Pole Beans | Mar 28 | May 30 | Jun 6 | — | Aug 1 – Sep 26 | 55–70 |
| Potatoes | Mar 28 | May 30 | Jun 6 | — | Aug 15 – Oct 24 | 70–120 |
| Pumpkin | Apr 18 | May 30 | Jun 6 | — | Sep 5 – Oct 24 | 85–120 |
| Purslane | Apr 18 | May 9 | May 23 | Jul 17 | Jul 4 – Aug 8 | 40–60 |
| Radicchio | Apr 18 | May 9 | May 23 | Jul 17 | Jul 25 – Aug 29 | 60–80 |
| Radish | — | May 9 | — | Jul 17 | Jun 6 – Jun 27 | 22–35 |
| Rhubarb | — | — | Jun 13 | — | — | 365–730 |
| Romanesco | Apr 18 | May 9 | May 23 | Jul 17 | Aug 8 – Sep 19 | 75–100 |
| Rutabaga | — | May 9 | — | Jul 17 | Aug 1 – Sep 5 | 80–100 |
| Salsify | — | May 9 | — | Jul 17 | Aug 22 – Oct 3 | 100–130 |
| Savoy Cabbage | Apr 18 | May 9 | May 23 | Jul 17 | Aug 1 – Sep 26 | 70–110 |
| Scallions | Apr 18 | May 9 | May 23 | Jul 17 | Jul 18 – Aug 15 | 50–70 |
| Scarlet Runner Beans | Mar 28 | May 30 | Jun 6 | — | Aug 8 – Sep 12 | 60–80 |
| Shallot | Apr 18 | May 9 | May 23 | Jul 17 | Aug 22 – Oct 10 | 90–120 |
| Shiso | Apr 4 | May 30 | Jun 6 | — | Aug 1 – Sep 26 | 50–70 |
| Snap Peas | Mar 28 | May 30 | Jun 6 | — | Aug 1 – Sep 26 | 55–70 |
| Snow Peas | Apr 18 | May 9 | May 23 | Jul 17 | Jul 18 – Sep 12 | 50–65 |
| Soybeans | — | May 30 | — | — | Aug 22 – Oct 17 | 80–120 |
| Spaghetti Squash | Apr 18 | May 30 | Jun 6 | — | Sep 5 – Oct 3 | 85–100 |
| Spinach | Apr 18 | May 9 | May 23 | Jul 17 | Jun 27 – Aug 29 | 35–50 |
| Squash (Summer) | Apr 18 | May 30 | Jun 6 | — | Jul 25 – Sep 26 | 45–65 |
| Squash (Winter) | Apr 18 | May 30 | Jun 6 | — | Aug 29 – Oct 24 | 80–120 |
| Sunchoke | — | — | Jun 6 | — | Sep 26 – Nov 21 | 110–150 |
| Sweet Corn | — | May 30 | — | — | Aug 1 – Sep 12 | 60–90 |
| Sweet Potatoes | Mar 28 | May 30 | Jun 6 | — | Sep 5 – Oct 24 | 90–120 |
| Tatsoi | Apr 18 | May 9 | May 23 | Jul 17 | Jun 27 – Aug 1 | 35–50 |
| Tomatillo | Mar 28 | May 30 | Jun 6 | — | Aug 8 – Oct 17 | 60–85 |
| Tomatoes | Mar 28 | May 30 | Jun 6 | — | Aug 8 – Oct 17 | 60–85 |
| Turnip | — | May 9 | — | Jul 17 | Jun 20 – Jul 25 | 40–60 |
| Watercress | Apr 18 | May 9 | May 23 | Jul 17 | Jul 4 – Aug 8 | 40–60 |
| Watermelon | Apr 18 | May 30 | Jun 6 | — | Aug 15 – Oct 3 | 70–100 |
| Wax Beans | — | May 30 | — | — | Jul 25 – Sep 19 | 50–65 |
| Winter Melon | Mar 28 | May 30 | Jun 6 | — | Sep 5 – Oct 24 | 90–120 |
| Yard Long Beans | Mar 28 | May 30 | Jun 6 | — | Aug 1 – Sep 12 | 55–80 |
| Zucchini | Apr 18 | May 30 | Jun 6 | — | Jul 25 – Sep 19 | 45–60 |
🍓 Fruits to Grow in Fremont County
27 fruits that grow well in Zone 6a with planting dates for Fremont County.
Show all 27 fruits with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Fall Plant | Harvest | Days to Maturity |
|---|---|---|---|---|---|---|
| Alpine Strawberries | — | — | Jun 13 | — | Sep 12 – Dec 26 | 90–180 |
| Aronia | — | — | Jun 13 | — | — | 730–1095 |
| Blackberries | — | — | Jun 13 | — | — | 365–730 |
| Blueberries | — | — | Jun 13 | — | — | 730–1095 |
| Boysenberries | — | — | Jun 13 | — | — | 365–730 |
| Cantaloupe | — | — | Jun 13 | — | Aug 22 – Sep 26 | 70–90 |
| Che Fruit | — | — | Jun 13 | — | — | 1095–1825 |
| Cranberries | — | — | Jun 13 | — | — | 730–1095 |
| Currants | — | — | Jun 13 | — | — | 730–1095 |
| Elderberries | — | — | Jun 13 | — | — | 730–1095 |
| Goji Berries | — | — | Jun 13 | — | — | 730–1095 |
| Gooseberries | — | — | Jun 13 | — | — | 730–1095 |
| Grapes | — | — | Jun 13 | — | — | 730–1095 |
| Ground Cherry | — | — | Jun 13 | — | Aug 22 – Oct 17 | 65–80 |
| Hardy Kiwi | — | — | Jun 13 | — | — | 1095–1825 |
| Haskaps | — | — | Jun 13 | — | — | 730–1095 |
| Honeydew | — | — | Jun 13 | — | Sep 5 – Oct 17 | 80–110 |
| Jostaberry | — | — | Jun 13 | — | — | 730–1095 |
| Lingonberries | — | — | Jun 13 | — | — | 730–1095 |
| Medlar | — | — | Jun 13 | — | — | 1095–1825 |
| Mulberries | — | — | Jun 13 | — | — | 730–1825 |
| Pawpaw | — | — | Jun 13 | — | — | 1095–2555 |
| Persimmon | — | — | Jun 13 | — | — | 1095–2555 |
| Quince | — | — | Jun 13 | — | — | 1095–1825 |
| Raspberries | — | — | Jun 13 | — | — | 365–730 |
| Serviceberries | — | — | Jun 13 | — | — | 730–1095 |
| Strawberries | — | — | Jun 13 | — | Sep 12 – Dec 26 | 90–365 |
🌿 Herbs to Grow in Fremont County
35 herbs that grow well in Zone 6a with planting dates for Fremont County.
Show all 35 herbs with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Fall Plant | Harvest | Days to Maturity |
|---|---|---|---|---|---|---|
| Angelica | Apr 18 | May 9 | May 16 | Jul 17 | — | 365–730 |
| Anise | Apr 18 | May 9 | May 16 | Jul 17 | Aug 15 – Oct 31 | 90–120 |
| Basil | Apr 4 | May 30 | Jun 6 | — | Aug 1 – Oct 3 | 50–75 |
| Bee Balm | — | — | May 30 | — | Aug 29 – Nov 14 | 90–120 |
| Borage | Apr 18 | May 9 | May 16 | Jul 17 | Jul 11 – Aug 29 | 50–60 |
| Caraway | Apr 18 | May 9 | May 16 | Jul 17 | — | 365–450 |
| Catnip | — | — | May 30 | — | Aug 1 – Oct 3 | 60–80 |
| Chamomile | Apr 18 | May 9 | May 16 | Jul 17 | Jul 18 – Sep 26 | 60–90 |
| Chervil | Apr 18 | May 9 | May 16 | Jul 17 | Jun 27 – Aug 29 | 40–60 |
| Chives | — | — | May 30 | — | Aug 1 – Oct 10 | 60–90 |
| Cilantro | Apr 18 | May 9 | May 16 | Jul 17 | Jun 27 – Aug 29 | 40–60 |
| Comfrey | — | — | May 30 | — | Aug 1 – Oct 10 | 60–90 |
| Cumin | Apr 18 | May 9 | May 16 | Jul 17 | Aug 29 – Oct 31 | 100–120 |
| Dill | Apr 18 | May 9 | May 16 | Jul 17 | Jun 27 – Aug 29 | 40–60 |
| Epazote | Apr 4 | May 30 | Jun 6 | — | Jul 25 – Sep 19 | 45–60 |
| Fennel (herb) | Apr 18 | May 9 | May 16 | Jul 17 | Jul 18 – Sep 26 | 60–90 |
| Feverfew | — | — | May 30 | — | Aug 29 – Nov 14 | 90–120 |
| Garlic Chives | — | — | May 30 | — | Aug 1 – Oct 10 | 60–90 |
| Horehound | — | — | May 30 | — | Aug 15 – Oct 10 | 75–90 |
| Hyssop | — | — | May 30 | — | Aug 8 – Oct 10 | 70–90 |
| Lemon Balm | — | — | May 30 | — | Aug 1 – Sep 19 | 60–70 |
| Lemon Thyme | — | — | May 30 | — | Aug 8 – Oct 10 | 70–90 |
| Lovage | — | — | May 30 | — | Aug 8 – Oct 10 | 70–90 |
| Marjoram | — | — | May 30 | — | Aug 1 – Oct 10 | 60–90 |
| Mint | — | — | May 30 | — | Aug 1 – Oct 10 | 60–90 |
| Oregano | — | — | May 30 | — | Aug 1 – Oct 10 | 60–90 |
| Parsley | Apr 18 | May 9 | May 16 | Jul 17 | Jul 18 – Sep 19 | 60–80 |
| Rue | — | — | May 30 | — | Aug 8 – Oct 10 | 70–90 |
| Sage | — | — | May 30 | — | Aug 15 – Oct 10 | 75–90 |
| Savory | — | — | May 30 | — | Jul 25 – Sep 19 | 50–70 |
| Sorrel | Apr 18 | May 9 | May 16 | Jul 17 | Jun 27 – Aug 29 | 40–60 |
| Tarragon | — | — | May 30 | — | Aug 1 – Oct 10 | 60–90 |
| Thai Basil | Apr 4 | May 30 | Jun 6 | — | Aug 1 – Oct 3 | 50–75 |
| Thyme | — | — | May 30 | — | Aug 8 – Oct 10 | 70–90 |
| Valerian | — | — | May 30 | — | Oct 3 – Dec 12 | 120–180 |
🌸 Flowers to Grow in Fremont County
53 flowers that grow well in Zone 6a with planting dates for Fremont County.
Show all 53 flowers with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Fall Plant | Bloom | Days to Maturity |
|---|---|---|---|---|---|---|
| Ageratum | Apr 4 | May 23 | May 23 | — | Jul 18 – Oct 24 | 60–75 |
| Alliums | — | — | — | Aug 14 | Sep 11 – Oct 9 | 28–42 |
| Anemones | Apr 25 | — | May 23 | — | Jun 27 – Jul 25 | 90–120 |
| Astilbe | Mar 21 | — | May 30 | — | Aug 8 – Oct 17 | 70–100 |
| Bachelor's Button | Apr 11 | Apr 25 | May 23 | Aug 14 | Jul 25 – Oct 10 | 60–90 |
| Begonias | Mar 14 | — | May 30 | — | Aug 8 – Nov 7 | 70–90 |
| Black-eyed Susan | Mar 21 | May 23 | May 30 | — | Aug 15 – Nov 28 | 60–80 |
| Bleeding Hearts | Mar 21 | — | May 30 | — | Jul 25 – Aug 29 | 60–90 |
| Calendula | Apr 11 | Apr 25 | May 23 | — | Jul 11 – Oct 10 | 50–70 |
| California Poppy | — | Apr 25 | — | — | Jul 4 – Aug 15 | 60–90 |
| Celosia | Apr 18 | May 30 | May 30 | — | Aug 1 – Nov 14 | 60–90 |
| Columbine | Mar 21 | Jun 6 | Jun 6 | — | Aug 1 – Sep 5 | 70–100 |
| Coreopsis | Mar 21 | May 30 | May 30 | — | Aug 8 – Nov 28 | 60–80 |
| Cosmos | Apr 25 | May 23 | May 23 | — | Aug 1 – Nov 7 | 60–90 |
| Crocus | — | — | — | Aug 14 | Jul 3 – Jul 24 | 10–20 |
| Daffodils | — | — | — | Aug 14 | Jul 10 – Jul 31 | 20–40 |
| Dahlias | Apr 25 | May 30 | May 30 | — | Aug 15 – Nov 28 | 70–120 |
| Daylily | Mar 21 | — | May 30 | — | Aug 15 – Nov 28 | 60–90 |
| Dianthus | Mar 28 | Apr 25 | May 9 | — | Jun 27 – Sep 26 | 60–80 |
| Echinacea (Purple Coneflower) | Mar 21 | Jun 6 | Jun 6 | — | Aug 29 – Dec 5 | 70–90 |
| Foxglove | Mar 21 | May 30 | May 30 | — | Jul 25 – Aug 29 | 80–120 |
| Gaillardia (Blanket Flower) | Apr 4 | May 30 | May 30 | — | Aug 8 – Dec 12 | 70–100 |
| Geraniums | Mar 14 | — | May 30 | — | Aug 8 – Nov 7 | 70–100 |
| Gladiolus | — | May 23 | May 23 | — | Aug 8 – Nov 21 | 70–100 |
| Hostas | Mar 14 | — | May 30 | — | Aug 15 – Nov 28 | 60–90 |
| Hyacinths | — | — | — | Aug 14 | Jul 31 – Aug 21 | 14–28 |
| Hydrangeas | Mar 14 | — | May 30 | — | Aug 8 – Nov 14 | 90–150 |
| Impatiens | Mar 28 | — | May 30 | — | Aug 8 – Nov 14 | 60–75 |
| Irises | — | Division | May 30 | — | Jul 25 – Aug 22 | 60–100 |
| Larkspur | — | Apr 25 | — | — | Jul 4 – Aug 29 | 60–90 |
| Lavender | Mar 14 | — | Jun 6 | — | Aug 15 – Oct 10 | 90–120 |
| Lilies | — | Division | May 30 | — | Aug 8 – Nov 14 | 70–120 |
| Lobelia | Mar 21 | — | May 9 | — | Jul 4 – Sep 26 | 70–80 |
| Lupine | Mar 21 | May 30 | May 30 | — | Jul 25 – Aug 29 | 75–100 |
| Marigolds | Apr 11 | May 30 | May 30 | — | Jul 25 – Oct 24 | 50–70 |
| Nasturtium | Apr 25 | May 30 | May 30 | — | Jul 25 – Nov 14 | 55–65 |
| Pansy | Mar 14 | — | May 23 | Jul 31 | Jul 18 – Sep 19 | 70–90 |
| Peonies | — | Division | May 30 | — | Aug 1 – Sep 5 | 90–120 |
| Petunia | Mar 28 | — | May 30 | — | Aug 8 – Nov 14 | 70–90 |
| Phlox | Mar 21 | May 30 | May 30 | — | Aug 8 – Oct 31 | 80–110 |
| Portulaca | Apr 18 | May 30 | May 30 | — | Jul 18 – Oct 31 | 50–70 |
| Ranunculus | Apr 11 | — | May 23 | — | Jul 4 – Aug 1 | 90–120 |
| Roses | Mar 14 | — | May 30 | — | Aug 8 – Nov 28 | 90–180 |
| Salvia | Mar 21 | — | May 30 | — | Aug 8 – Nov 14 | 70–90 |
| Sedum (Stonecrop) | Mar 21 | — | May 30 | — | Sep 19 – Dec 5 | 60–90 |
| Snapdragon | Mar 14 | May 2 | May 23 | — | Aug 1 – Oct 10 | 70–100 |
| Sunflower | May 2 | May 30 | May 30 | — | Aug 22 – Nov 14 | 70–100 |
| Sweet Alyssum | Apr 4 | May 2 | May 23 | — | Jul 4 – Sep 12 | 45–60 |
| Sweet Pea | Apr 11 | Apr 18 | May 23 | — | Aug 8 – Oct 17 | 65–85 |
| Tulips | — | — | — | Aug 14 | Jul 24 – Aug 21 | 15–30 |
| Vinca (Annual) | Mar 14 | — | May 30 | — | Aug 8 – Nov 14 | 70–90 |
| Yarrow | Mar 21 | May 23 | May 30 | — | Aug 8 – Nov 28 | 60–90 |
| Zinnia | Apr 25 | May 30 | May 30 | — | Aug 8 – Nov 14 | 60–70 |
Monthly Planting Guide for Fremont County
Gardening Guides & Resources
Helpful guides from The Ultimate Homestead to improve your garden in Fremont County.
Frequently Asked Questions
What planting zone is Fremont County, CO?
Fremont 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 Fremont County, CO?
Based on 31 years of NOAA weather station data, the median last spring frost in Fremont County falls around May 23. In 8 out of 10 years, last frost lands between April 28 and June 15 — a 47-day window of variability. Use June 15 as your conservative safe-to-plant date for frost-sensitive crops.
When is the first fall frost in Fremont County, CO?
The median first fall frost in Fremont County arrives around September 25. In cold years it can arrive as early as September 8; in mild years as late as October 13. Harvest or protect frost-sensitive crops — tomatoes, peppers, basil, squash — before this date.
How long is the growing season in Fremont County?
Fremont County has a frost-free growing season of approximately 125 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 3.45 days per decade.
What is the soil like in Fremont County for gardening?
Fremont County has predominantly Loam soil with a pH range of 6.7–8.3 and Well Drained drainage. Most vegetables and herbs grow well with standard composting and seasonal soil amendment.
What is grown commercially in Fremont County?
Fremont County has commercial agriculture that includes Hay, Cattle, Wheat. These crops reflect the local climate and soil conditions — what succeeds commercially often translates well to home gardens in the same area.
Is Fremont County a good location for home gardening?
Fremont 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 Fremont County Garden Planner — Free
A 22-page printable planner built for Fremont 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