La Plata County, CO — Planting Guide
La Plata County is in USDA Zone 5b. The average last spring frost is May 31 and the first fall frost is September 21, giving you a growing season of approximately 113 days.
At an elevation of 5,246 ft, La Plata County receives approximately 14.9 in of rainfall annually. Summer highs average 83°F with winter lows around 19°F. The predominant soil type is Loam.
Based on 30 years of NOAA climate station data, the last frost date here varies by 57 days year to year — ranging from April 30 in warm years to June 26 in cold years. The growing season is trending longer by about 2.45 days per decade. La Plata County scores 29/100 (Challenging) on the Microclimate Index.
🌡️ Zone
5b (-15°F to -10°F min)
❄️ Last Frost
May 31
🍂 First Frost
September 21
📅 Growing Season
113 days
⛰️ Elevation
5,246 ft
🌧️ Annual Rainfall
14.9 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 | 0.9 in | 6 days | — | None |
| Feb | 0.9 in | 6 days | — | None |
| Mar | 1.2 in | 7 days | — | None |
| Apr | 1.6 in | 8 days | 2.7 in | High |
| May | 1.6 in | 8 days | 2.7 in | High |
| Jun | 0.9 in | 5 days | 3.4 in | Critical |
| Jul | 1.4 in | 5 days | 2.9 in | High |
| Aug | 1.5 in | 6 days | 2.8 in | High |
| Sep | 1.3 in | 5 days | 3 in | High |
| Oct | 1.5 in | 5 days | 2.8 in | High |
| Nov | 1 in | 6 days | — | None |
| Dec | 1 in | 7 days | — | None |
Annual total: 14.8 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.
La Plata County Soil Profile
Soil Type
Loam
Soil pH
6.2-7.9
Drainage
Well Drained
Frost Risk Probability
Based on 30 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 12 | 108 days |
| Cautious | Jun 16 | Oct 3 | 109 days |
| Average year | May 31 | Sep 21 | 113 days |
| Optimistic | May 14 | Sep 10 | 119 days |
| Aggressive (risky) | Apr 30 | Aug 15 | 107 days |
Not very — frost dates can vary by ±57 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 longer here (about 2.5 days per decade). Spring is arriving earlier than it used to. Good news for gardeners.
Gardening Difficulty Score
La Plata County has challenging growing conditions. Season extension and careful variety selection are essential.
Local Gardening Help in La Plata 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 La Plata County's climate and soil.
County Extension Office
La Plata 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 La Plata County
Finding local nurseries & garden centers in La Plata County
Why Buy Local
Local nurseries carry plants that are proven to grow in your area. Staff can give you advice specific to La Plata 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 La Plata County CO" or "garden center La Plata 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 La Plata County CO" or check your extension office and local parks department. Facebook groups like "La Plata 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.
Sunlight & Day Length
Monthly daylight hours and peak sun — critical for onion varieties, photoperiod-sensitive plants, and solar garden planning.
Longest Day
14.6 hours
Summer solstice daylight
Shortest Day
9.4 hours
Winter solstice daylight
Peak Sun Hours
10.1 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 | 9.7 hr | 5.1 hr | Short day |
| February | 10.6 hr | 6 hr | Short day |
| March | 11.7 hr | 7.2 hr | Short day |
| April | 13 hr | 7.7 hr | Neutral |
| May | 14 hr | 8.6 hr | Long day |
| June | 14.6 hr | 10.1 hr | Long day |
| July | 14.3 hr | 10.1 hr | Long day |
| August | 13.4 hr | 9.2 hr | Neutral |
| September | 12.2 hr | 8.4 hr | Neutral |
| October | 11 hr | 7.4 hr | Short day |
| November | 10 hr | 5.6 hr | Short day |
| December | 9.4 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 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 warm enough from Jul through Aug.
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 | 7°F | 17°F | ❄️ Dormant | ~36 weeks |
| Feb | 11°F | 17°F | ❄️ Dormant | ~36 weeks |
| Mar | 17°F | 20°F | ❄️ Dormant | ~36 weeks |
| Apr | 31°F | 30°F | ❄️ Dormant | ~36 weeks |
| May | 44°F | 42°F | 🐢 Slow | ~24 weeks |
| Jun | 54°F | 50°F | ♻️ Active | ~14 weeks |
| Jul | 64°F | 56°F | ♻️ Active | ~14 weeks |
| Aug | 63°F | 58°F | ♻️ Active | ~14 weeks |
| Sep | 57°F | 55°F | ♻️ Active | ~14 weeks |
| Oct | 45°F | 46°F | 🐢 Slow | ~24 weeks |
| Nov | 29°F | 36°F | ❄️ Dormant | ~36 weeks |
| Dec | 17°F | 24°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 La Plata County
Computed from local climate patterns — warmer, humid conditions increase pest generations and fungal disease risk.
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 | Low | 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 La Plata County
Cover crops protect bare soil, fix nitrogen, suppress weeds, and improve soil structure — with county-specific planting dates.
Spring Cover Crops (3 options) — Build soil before the main growing season
| Crop | Plant By | Terminate | N-Fixing | Soil Benefit |
|---|---|---|---|---|
| Buckwheat | Jun 6 | Jul 20 | — | Rapid growth, attracts pollinators, suppresses weeds |
| Sorghum-sudan grass | Jun 11 | Jul 13 | — | Massive biomass, breaks compaction, suppresses nematodes |
| White clover | Apr 30 | Jul 20 | ✓ 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 23 | Aug 24 | — | 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 21 | May 10 | ✓ Yes | Fixes nitrogen, good for heavy clay soils |
| Daikon radish | Aug 1 | May 17 | — | Deep taproot breaks compaction, excellent for clay soils |
| Hairy vetch | Jul 16 | May 10 | ✓ Yes | Excellent nitrogen fixer, good for depleted soils |
| Oats | Aug 20 | May 10 | — | Quick biomass, winterkills in cold zones — no spring tillage needed |
| Winter rye | Jun 19 | May 10 | — | Suppresses weeds, prevents erosion, breaks up compacted soil |
| Winter wheat | Jun 27 | May 10 | — | 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: 11 mph
Fall: 13 mph Winter: 16 mph
Prevailing wind: W. Windy area — plant a windbreak hedge on the W side of your garden.
Windbreak Benefit
6.9/10
Moderately beneficial — a simple fence or trellis can protect delicate crops from wind stress.
Frost Pocket Risk
High
Hilly terrain with 1,078 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
7,376 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 2,000 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
Jan, Feb, Jun
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 14.8 inches of rain per year
- A 1,000 sq ft roof can collect roughly 7,376 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 La Plata County
Soil Type
Loam
Soil pH 6.2–7.9 · 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
113-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.
Free Garden Planner
Plan your entire garden season — organize planting dates, track what you're growing, and know exactly when to start seeds, transplant, and harvest.
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 La Plata County
106 vegetables that grow well in Zone 5b with planting dates for La Plata County.
Show all 106 vegetables with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Acorn Squash | Apr 26 | Jun 7 | Jun 14 | Sep 6 – Oct 11 | 80–100 |
| Amaranth | Apr 5 | Jun 7 | Jun 14 | Sep 13 – Nov 1 | 90–120 |
| Arugula | Apr 26 | May 17 | May 31 | Jul 5 – Sep 6 | 30–50 |
| Asparagus | — | — | Jun 14 | — | 730–1095 |
| Beets | — | May 17 | — | Jul 12 – Aug 9 | 50–70 |
| Belgian Endive | Apr 26 | May 17 | May 31 | Sep 20 – Nov 15 | 110–150 |
| Bitter Melon | Apr 5 | Jun 7 | Jun 14 | Aug 16 – Sep 27 | 60–90 |
| Black Beans | — | Jun 7 | — | Sep 6 – Oct 25 | 90–120 |
| Bok Choy | Apr 26 | May 17 | May 31 | Jul 12 – Aug 16 | 40–60 |
| Broccoli | Apr 26 | May 17 | May 31 | Aug 2 – Sep 13 | 60–90 |
| Broccoli Rabe | Apr 26 | May 17 | May 31 | Jul 12 – Aug 16 | 40–60 |
| Brussels Sprouts | Apr 26 | May 17 | May 31 | Aug 30 – Oct 25 | 90–130 |
| Butternut Squash | Apr 26 | Jun 7 | Jun 14 | Sep 13 – Oct 18 | 85–110 |
| Cabbage | Apr 26 | May 17 | May 31 | Aug 2 – Sep 27 | 60–100 |
| Calabash | Apr 5 | Jun 7 | Jun 14 | Sep 6 – Nov 1 | 80–120 |
| Carrots | — | May 17 | — | Jul 19 – Aug 23 | 60–80 |
| Cauliflower | Apr 26 | May 17 | May 31 | Jul 26 – Sep 27 | 55–100 |
| Celeriac | Apr 26 | May 17 | May 31 | Sep 13 – Oct 18 | 100–120 |
| Celery | Apr 26 | May 17 | May 31 | Aug 23 – Oct 18 | 80–120 |
| Celtuce | Apr 26 | May 17 | May 31 | Aug 2 – Sep 13 | 60–90 |
| Chard | Apr 26 | May 17 | May 31 | Jul 26 – Sep 13 | 50–60 |
| Chickpeas | Apr 26 | May 17 | May 31 | Aug 23 – Oct 4 | 80–110 |
| Chicory | Apr 26 | May 17 | May 31 | Aug 2 – Sep 13 | 60–85 |
| Chinese Cabbage | Apr 26 | May 17 | May 31 | Jul 26 – Aug 23 | 50–70 |
| Christmas Lima Beans | Apr 5 | Jun 7 | Jun 14 | Sep 6 – Oct 11 | 80–100 |
| Collard Greens | Apr 26 | May 17 | May 31 | Jul 26 – Sep 27 | 55–75 |
| Corn | — | Jun 7 | — | Aug 9 – Oct 4 | 60–100 |
| Cowpeas | — | Jun 7 | — | Aug 9 – Sep 20 | 60–90 |
| Cress | Apr 26 | May 17 | May 31 | Jun 14 – Jul 5 | 14–21 |
| Crookneck Squash | Apr 26 | Jun 7 | Jun 14 | Aug 2 – Aug 30 | 45–60 |
| Crosne | — | May 17 | — | Oct 18 – Nov 1 | 150–200 |
| Cucumber | Apr 26 | Jun 7 | Jun 14 | Aug 9 – Oct 4 | 50–70 |
| Daikon | — | May 17 | — | Jul 12 – Aug 9 | 50–70 |
| Delicata Squash | Apr 26 | Jun 7 | Jun 14 | Sep 6 – Oct 11 | 80–100 |
| Edamame | — | Jun 7 | — | Aug 23 – Oct 4 | 75–100 |
| Eggplant | Mar 22 | Jun 7 | Jun 14 | Aug 23 – Oct 25 | 65–85 |
| Endive | Apr 26 | May 17 | May 31 | Jul 19 – Aug 23 | 45–65 |
| Escarole | Apr 26 | May 17 | May 31 | Jul 26 – Aug 23 | 50–70 |
| Fava Beans | Apr 26 | May 17 | May 31 | Aug 16 – Sep 27 | 75–100 |
| Fennel | Apr 5 | Jun 7 | Jun 14 | Aug 16 – Sep 27 | 60–90 |
| Garlic | — | — | — | — | 90–240 |
| Green Beans | — | Jun 7 | — | Aug 2 – Sep 27 | 50–65 |
| Horseradish | — | — | Jun 14 | Oct 18 – Nov 29 | 120–180 |
| Hot Peppers | Mar 22 | Jun 7 | Jun 14 | Aug 23 – Nov 29 | 70–120 |
| Hubbard Squash | Apr 26 | Jun 7 | Jun 14 | Sep 27 – Nov 1 | 100–120 |
| Kabocha | Apr 26 | Jun 7 | Jun 14 | Sep 13 – Oct 11 | 85–100 |
| Kai Lan | Apr 26 | May 17 | May 31 | Jul 19 – Aug 16 | 45–60 |
| Kale | Apr 26 | May 17 | May 31 | Jul 26 – Sep 20 | 50–70 |
| Kidney Beans | — | Jun 7 | — | Sep 6 – Oct 11 | 85–110 |
| Kohlrabi | Apr 26 | May 17 | May 31 | Jul 19 – Aug 23 | 45–65 |
| Komatsuna | Apr 26 | May 17 | May 31 | Jul 5 – Aug 9 | 35–50 |
| Leeks | Apr 26 | May 17 | May 31 | Aug 30 – Nov 15 | 90–150 |
| Lentils | Apr 26 | May 17 | May 31 | Aug 23 – Oct 4 | 80–110 |
| Lettuce | Apr 26 | May 17 | May 31 | Jul 5 – Sep 13 | 30–60 |
| Lima Beans | — | Jun 7 | — | Aug 9 – Sep 20 | 60–90 |
| Mache | Apr 26 | May 17 | May 31 | Jul 12 – Aug 16 | 40–60 |
| Melon | Apr 26 | Jun 7 | Jun 14 | Aug 23 – Oct 11 | 70–100 |
| Microgreens | Apr 26 | May 17 | May 31 | Jun 7 – Jul 5 | 7–21 |
| Mitsuba | Apr 26 | May 17 | May 24 | Jul 19 – Sep 13 | 50–70 |
| Mizuna | Apr 26 | May 17 | May 31 | Jul 5 – Aug 2 | 30–45 |
| Mustard Greens | Apr 26 | May 17 | May 31 | Jul 5 – Sep 6 | 30–50 |
| Napa Cabbage | Apr 26 | May 17 | May 31 | Jul 26 – Aug 30 | 55–75 |
| New Zealand Spinach | Apr 5 | Jun 7 | Jun 14 | Aug 9 – Sep 6 | 55–70 |
| Okra | Apr 5 | Jun 7 | Jun 14 | Aug 9 – Oct 4 | 50–65 |
| Onion | Apr 26 | May 17 | May 31 | Aug 30 – Oct 18 | 90–120 |
| Pac Choi | Apr 26 | May 17 | May 31 | Jul 12 – Aug 9 | 40–55 |
| Parsnip | — | May 17 | — | Aug 30 – Oct 11 | 100–130 |
| Patty Pan Squash | Apr 26 | Jun 7 | Jun 14 | Aug 2 – Aug 30 | 45–60 |
| Peas | Apr 26 | May 17 | May 31 | Jul 26 – Sep 20 | 55–70 |
| Peppers | Mar 22 | Jun 7 | Jun 14 | Aug 16 – Oct 25 | 60–90 |
| Pole Beans | Apr 5 | Jun 7 | Jun 14 | Aug 9 – Oct 4 | 55–70 |
| Potatoes | Apr 5 | Jun 7 | Jun 14 | Aug 23 – Nov 1 | 70–120 |
| Pumpkin | Apr 26 | Jun 7 | Jun 14 | Sep 13 – Nov 1 | 85–120 |
| Purslane | Apr 26 | May 17 | May 31 | Jul 12 – Aug 16 | 40–60 |
| Radicchio | Apr 26 | May 17 | May 31 | Aug 2 – Sep 6 | 60–80 |
| Radish | — | May 17 | — | Jun 14 – Jul 5 | 22–35 |
| Rhubarb | — | — | Jun 21 | — | 365–730 |
| Romanesco | Apr 26 | May 17 | May 31 | Aug 16 – Sep 27 | 75–100 |
| Rutabaga | — | May 17 | — | Aug 9 – Sep 13 | 80–100 |
| Salsify | — | May 17 | — | Aug 30 – Oct 11 | 100–130 |
| Savoy Cabbage | Apr 26 | May 17 | May 31 | Aug 9 – Oct 4 | 70–110 |
| Scallions | Apr 26 | May 17 | May 31 | Jul 26 – Aug 23 | 50–70 |
| Scarlet Runner Beans | Apr 5 | Jun 7 | Jun 14 | Aug 16 – Sep 20 | 60–80 |
| Shallot | Apr 26 | May 17 | May 31 | Aug 30 – Oct 18 | 90–120 |
| Shiso | Apr 12 | Jun 7 | Jun 14 | Aug 9 – Oct 4 | 50–70 |
| Snap Peas | Apr 5 | Jun 7 | Jun 14 | Aug 9 – Oct 4 | 55–70 |
| Snow Peas | Apr 26 | May 17 | May 31 | Jul 26 – Sep 20 | 50–65 |
| Soybeans | — | Jun 7 | — | Aug 30 – Oct 25 | 80–120 |
| Spaghetti Squash | Apr 26 | Jun 7 | Jun 14 | Sep 13 – Oct 11 | 85–100 |
| Spinach | Apr 26 | May 17 | May 31 | Jul 5 – Sep 6 | 35–50 |
| Squash (Summer) | Apr 26 | Jun 7 | Jun 14 | Aug 2 – Oct 4 | 45–65 |
| Squash (Winter) | Apr 26 | Jun 7 | Jun 14 | Sep 6 – Nov 1 | 80–120 |
| Sunchoke | — | — | Jun 14 | Oct 4 – Nov 29 | 110–150 |
| Sunflower | Apr 5 | Jun 7 | Jun 14 | Aug 23 – Oct 11 | 70–100 |
| Sweet Corn | — | Jun 7 | — | Aug 9 – Sep 20 | 60–90 |
| Sweet Potatoes | Apr 5 | Jun 7 | Jun 14 | Sep 13 – Nov 1 | 90–120 |
| Tatsoi | Apr 26 | May 17 | May 31 | Jul 5 – Aug 9 | 35–50 |
| Tomatillo | Apr 5 | Jun 7 | Jun 14 | Aug 16 – Oct 25 | 60–85 |
| Tomatoes | Apr 5 | Jun 7 | Jun 14 | Aug 16 – Oct 25 | 60–85 |
| Turnip | — | May 17 | — | Jun 28 – Aug 2 | 40–60 |
| Watercress | Apr 26 | May 17 | May 31 | Jul 12 – Aug 16 | 40–60 |
| Watermelon | Apr 26 | Jun 7 | Jun 14 | Aug 23 – Oct 11 | 70–100 |
| Wax Beans | — | Jun 7 | — | Aug 2 – Sep 27 | 50–65 |
| Winter Melon | Apr 5 | Jun 7 | Jun 14 | Sep 13 – Nov 1 | 90–120 |
| Yard Long Beans | Apr 5 | Jun 7 | Jun 14 | Aug 9 – Sep 20 | 55–80 |
| Zucchini | Apr 26 | Jun 7 | Jun 14 | Aug 2 – Sep 27 | 45–60 |
🍓 Fruits to Grow in La Plata County
27 fruits that grow well in Zone 5b with planting dates for La Plata County.
Show all 27 fruits with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Alpine Strawberries | — | — | Jun 21 | Sep 20 – Dec 6 | 90–180 |
| Aronia | — | — | Jun 21 | — | 730–1095 |
| Blackberries | — | — | Jun 21 | — | 365–730 |
| Blueberries | — | — | Jun 21 | — | 730–1095 |
| Boysenberries | — | — | Jun 21 | — | 365–730 |
| Cantaloupe | — | — | Jun 21 | Aug 30 – Oct 4 | 70–90 |
| Che Fruit | — | — | Jun 21 | — | 1095–1825 |
| Cranberries | — | — | Jun 21 | — | 730–1095 |
| Currants | — | — | Jun 21 | — | 730–1095 |
| Elderberries | — | — | Jun 21 | — | 730–1095 |
| Goji Berries | — | — | Jun 21 | — | 730–1095 |
| Gooseberries | — | — | Jun 21 | — | 730–1095 |
| Grapes | — | — | Jun 21 | — | 730–1095 |
| Ground Cherry | — | — | Jun 21 | Aug 30 – Oct 25 | 65–80 |
| Hardy Kiwi | — | — | Jun 21 | — | 1095–1825 |
| Haskaps | — | — | Jun 21 | — | 730–1095 |
| Honeydew | — | — | Jun 21 | Sep 13 – Oct 25 | 80–110 |
| Jostaberry | — | — | Jun 21 | — | 730–1095 |
| Lingonberries | — | — | Jun 21 | — | 730–1095 |
| Medlar | — | — | Jun 21 | — | 1095–1825 |
| Mulberries | — | — | Jun 21 | — | 730–1825 |
| Pawpaw | — | — | Jun 21 | — | 1095–2555 |
| Persimmon | — | — | Jun 21 | — | 1095–2555 |
| Quince | — | — | Jun 21 | — | 1095–1825 |
| Raspberries | — | — | Jun 21 | — | 365–730 |
| Serviceberries | — | — | Jun 21 | — | 730–1095 |
| Strawberries | — | — | Jun 21 | Sep 20 – Dec 6 | 90–365 |
🌿 Herbs to Grow in La Plata County
37 herbs that grow well in Zone 5b with planting dates for La Plata County.
Show all 37 herbs with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Angelica | Apr 26 | May 17 | May 24 | — | 365–730 |
| Anise | Apr 26 | May 17 | May 24 | Aug 23 – Nov 8 | 90–120 |
| Basil | Apr 12 | Jun 7 | Jun 14 | Aug 9 – Oct 11 | 50–75 |
| Bee Balm | — | — | Jun 7 | Sep 6 – Nov 22 | 90–120 |
| Borage | Apr 26 | May 17 | May 24 | Jul 19 – Sep 6 | 50–60 |
| Caraway | Apr 26 | May 17 | May 24 | — | 365–450 |
| Catnip | — | — | Jun 7 | Aug 9 – Oct 11 | 60–80 |
| Chamomile | Apr 26 | May 17 | May 24 | Jul 26 – Oct 4 | 60–90 |
| Chervil | Apr 26 | May 17 | May 24 | Jul 5 – Sep 6 | 40–60 |
| Chives | — | — | Jun 7 | Aug 9 – Oct 18 | 60–90 |
| Cilantro | Apr 26 | May 17 | May 24 | Jul 5 – Sep 6 | 40–60 |
| Comfrey | — | — | Jun 7 | Aug 9 – Oct 18 | 60–90 |
| Cumin | Apr 26 | May 17 | May 24 | Sep 6 – Nov 8 | 100–120 |
| Dill | Apr 26 | May 17 | May 24 | Jul 5 – Sep 6 | 40–60 |
| Echinacea | — | — | Jun 7 | Oct 11 – Nov 22 | 120–180 |
| Epazote | Apr 12 | Jun 7 | Jun 14 | Aug 2 – Sep 27 | 45–60 |
| Fennel (herb) | Apr 26 | May 17 | May 24 | Jul 26 – Oct 4 | 60–90 |
| Feverfew | — | — | Jun 7 | Sep 6 – Nov 22 | 90–120 |
| Garlic Chives | — | — | Jun 7 | Aug 9 – Oct 18 | 60–90 |
| Horehound | — | — | Jun 7 | Aug 23 – Oct 18 | 75–90 |
| Hyssop | — | — | Jun 7 | Aug 16 – Oct 18 | 70–90 |
| Lavender | — | — | Jun 7 | Sep 6 – Nov 22 | 90–200 |
| Lemon Balm | — | — | Jun 7 | Aug 9 – Sep 27 | 60–70 |
| Lemon Thyme | — | — | Jun 7 | Aug 16 – Oct 18 | 70–90 |
| Lovage | — | — | Jun 7 | Aug 16 – Oct 18 | 70–90 |
| Mint | — | — | Jun 7 | Aug 9 – Oct 18 | 60–90 |
| Oregano | — | — | Jun 7 | Aug 9 – Oct 18 | 60–90 |
| Parsley | Apr 26 | May 17 | May 24 | Jul 26 – Sep 27 | 60–80 |
| Rue | — | — | Jun 7 | Aug 16 – Oct 18 | 70–90 |
| Sage | — | — | Jun 7 | Aug 23 – Oct 18 | 75–90 |
| Savory | — | — | Jun 7 | Aug 2 – Sep 27 | 50–70 |
| Sorrel | Apr 26 | May 17 | May 24 | Jul 5 – Sep 6 | 40–60 |
| Tarragon | — | — | Jun 7 | Aug 9 – Oct 18 | 60–90 |
| Thai Basil | Apr 12 | Jun 7 | Jun 14 | Aug 9 – Oct 11 | 50–75 |
| Thyme | — | — | Jun 7 | Aug 16 – Oct 18 | 70–90 |
| Valerian | — | — | Jun 7 | Oct 11 – Nov 22 | 120–180 |
| Yarrow | — | — | Jun 7 | Sep 6 – Nov 22 | 90–120 |
Monthly Planting Guide for La Plata County
Gardening Guides & Resources
Helpful guides from The Ultimate Homestead to improve your garden in La Plata County.
Frequently Asked Questions
What planting zone is La Plata County, CO?
La Plata County is in USDA Hardiness Zone 5b. 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 La Plata County, CO?
Based on 30 years of NOAA weather station data, the median last spring frost in La Plata County falls around May 31. In 8 out of 10 years, last frost lands between April 30 and June 26 — a 57-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 La Plata County, CO?
The median first fall frost in La Plata County arrives around September 21. In cold years it can arrive as early as August 15; in mild years as late as October 12. Harvest or protect frost-sensitive crops — tomatoes, peppers, basil, squash — before this date.
How long is the growing season in La Plata County?
La Plata County has a frost-free growing season of approximately 113 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 longer by about 2.45 days per decade.
What is the soil like in La Plata County for gardening?
La Plata County has predominantly Loam soil with a pH range of 6.2–7.9 and Well Drained drainage. Most vegetables and herbs grow well with standard composting and seasonal soil amendment.
What is grown commercially in La Plata County?
La Plata County has commercial agriculture that includes Cattle, Hay, Wheat. These crops reflect the local climate and soil conditions — what succeeds commercially often translates well to home gardens in the same area.
Is La Plata County a good location for home gardening?
La Plata County scores 29/100 (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.
Plan Your Garden with Confidence
Get our free Garden Planner — designed to help La Plata County gardeners in Zone 5b organize planting dates, track what's growing, and never miss a planting window.
Get Your Free Garden Planner →Free download. Plan your entire garden season in minutes.
