Durango, CO Frost Dates
Average frost dates, USDA hardiness zone, and growing season length for Durango, Colorado.
Gardening in Durango
Southwest Colorado's mountain town gardens in conditions that combine high altitude, mountain beauty, and a surprisingly workable growing season in the Animas River valley.
Zone 5b at 6,500 feet — the Animas Valley creates a growing corridor between the La Plata Mountains. Your 133-day season is short. Mountain sun is intense. The valley bottom is warmer than the surrounding benchlands — location within Durango matters significantly.
Durango's farm-to-table restaurants draw from the Animas Valley's small farms and gardens. The Durango Farmers Market and the Four Corners' agricultural heritage connect mountain living with food production.
What This Means for Durango Gardeners
The average last spring frost in Durango is around May 15, and the average first fall frost arrives around September 25. That gives you approximately 133 frost-free days to work with.
133 frost-free days means every warm day counts. Focus on cold-hardy crops that thrive in your moderate temperatures: kale, lettuce, peas, radishes, potatoes, and root vegetables. For warm-season crops, choose only the shortest-season varieties (sub-65-day tomatoes, 55-day beans) and start everything indoors. Season extension — row covers, cold frames, plastic mulch — isn't a luxury here, it's essential infrastructure.
These dates are based on NOAA 30-year Climate Normal data for the Durango area. Your actual frost dates could shift 2-3 weeks in either direction in any given year. Learn more about our data sources.
What to Grow in Durango
With 133 frost-free days, Durango gardeners need to plan strategically — start warm-season crops indoors and choose short-season varieties. Cool-season crops are your strength, thriving in the moderate temperatures that define your growing window. Recommended starting points: kale, lettuce, peas, carrots, potatoes, radishes, garlic, and short-season tomatoes.
See the full Colorado planting guide for all 40 plants: Colorado Planting Calendar. Or enter your zip code for exact planting dates personalized to Durango.
More About Zone 5B
Durango is in USDA Hardiness Zone 5B, which means average annual extreme minimum temperatures between -15°F to -10°F. View the full Zone 5B planting guide.
See the complete planting calendar for Colorado: Colorado Planting Calendar.
Other Cities in Colorado
Frequently Asked Questions
These dates are based on NOAA's 30-year Climate Normal data for the Durango area. They represent historical averages, not predictions. In any given year, the actual last frost could be 2-3 weeks earlier or later. Microclimates within Durango (urban heat islands, hilltops, low-lying valleys) can also shift your local frost dates by a week or more.
Start everything possible indoors — your 133-day season doesn't leave room for a slow start. Direct sow only the fastest, hardiest crops (radishes, lettuce, peas) 3-4 weeks before last frost (May 15). Choose short-season varieties for warm crops. Enter your zip code for exact dates.