Grand Island, NE Frost Dates
Average frost dates, USDA hardiness zone, and growing season length for Grand Island, Nebraska.
Gardening in Grand Island
Central Nebraska's agricultural crossroads grows food on the Platte River's generous bottomland. Stuhr Museum preserves pioneer gardening traditions.
Zone 5b with 160 frost-free days. The Platte River valley is wide and fertile. Classic Great Plains climate — wind, temperature swings, and intense summer sun.
The Platte Valley's agricultural heritage extends from massive center-pivot fields to backyard plots that grow the same crops on a personal scale.
What This Means for Grand Island Gardeners
The average last spring frost in Grand Island is around April 28, and the average first fall frost arrives around October 5. That gives you approximately 160 frost-free days to work with.
At 160 days, you're working with a compressed but productive window. Choose varieties by their days-to-maturity number — anything under 75 days is safe, 75-90 requires indoor starting, and 90+ is a calculated risk. The tradeoff: your cool, moderate summers are excellent for crops that heat-zone gardeners struggle with. Your lettuce doesn't bolt in June. Your peas produce for weeks longer. Cool-season crops are your superpower.
These dates are based on NOAA 30-year Climate Normal data for the Grand Island 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 Grand Island
Grand Island's 160-day season gives you plenty of time for most vegetables with good planning. Start warm-season crops indoors to maximize your window. Cool-season crops thrive in your spring and fall shoulder seasons. Recommended starting points: tomatoes, peppers, lettuce, carrots, beans, broccoli, garlic, and basil.
See the full Nebraska planting guide for all 40 plants: Nebraska Planting Calendar. Or enter your zip code for exact planting dates personalized to Grand Island.
More About Zone 5B
Grand Island 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 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 Grand Island 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 Grand Island (urban heat islands, hilltops, low-lying valleys) can also shift your local frost dates by a week or more.
Start warm-season seeds indoors 6-8 weeks before your last frost (April 28) to maximize your 160-day window. Direct sow cold-hardy crops like peas and lettuce 3-4 weeks before last frost. Every week of early indoor starting matters at this season length. Enter your zip code for exact dates.