Scottsbluff, NE Frost Dates
Average frost dates, USDA hardiness zone, and growing season length for Scottsbluff, Nebraska.
Gardening in Scottsbluff
Western Nebraska's High Plains city sits in the North Platte Valley, where irrigated agriculture has transformed the semi-arid landscape.
Zone 5a with 138 frost-free days. The North Platte River provides irrigation in otherwise dry country. High-altitude sun is intense. Alkaline soil needs amendment.
Scotts Bluff National Monument marks the Oregon Trail; the surrounding irrigated farms prove the valley grows food at commercial scale.
What This Means for Scottsbluff Gardeners
The average last spring frost in Scottsbluff is around May 10, and the average first fall frost arrives around September 25. That gives you approximately 138 frost-free days to work with.
138 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 Scottsbluff 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 Scottsbluff
With 138 frost-free days, Scottsbluff 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 Nebraska planting guide for all 40 plants: Nebraska Planting Calendar. Or enter your zip code for exact planting dates personalized to Scottsbluff.
More About Zone 5A
Scottsbluff is in USDA Hardiness Zone 5A, which means average annual extreme minimum temperatures between -20°F to -15°F. View the full Zone 5A planting guide.
See the complete planting calendar for Nebraska: Nebraska Planting Calendar.
Other Cities in Nebraska
Frequently Asked Questions
These dates are based on NOAA's 30-year Climate Normal data for the Scottsbluff 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 Scottsbluff (urban heat islands, hilltops, low-lying valleys) can also shift your local frost dates by a week or more.
Start everything possible indoors — your 138-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 10). Choose short-season varieties for warm crops. Enter your zip code for exact dates.