When to Plant Sunflowers in Nebraska
Few things bring more joy than a row of sunflowers turning their faces to the sun. Easy, dramatic, and pollinator-friendly.
The Short Answer
Nebraska Frost Dates
Your planting dates depend on which part of Nebraska you're in. Here are the frost date ranges by region:
| Region | Zones | Last Frost (Spring) | First Frost (Fall) |
|---|---|---|---|
| Northern/Western Nebraska | 4a, 4b | May 5 - May 20 | Sep 20 - Oct 5 |
| Eastern Nebraska | 5a, 5b | Apr 25 - May 10 | Oct 1 - Oct 15 |
Sunflowers Planting Schedule for Nebraska
Northern/Western Nebraska (Zones 4a, 4b)
Average last frost: May 5 - May 20 · Average first frost: Sep 20 - Oct 5
Eastern Nebraska (Zones 5a, 5b)
Average last frost: Apr 25 - May 10 · Average first frost: Oct 1 - Oct 15
Growing Sunflowers in Nebraska
Sunflowers in Nebraska's Climate
Sunflowers are surprisingly well-suited to cold climates — they grow fast enough to bloom before frost even in zones with 100-day seasons. Direct sow 1-2 weeks after your last frost. The intense summer daylight in northern latitudes actually produces taller stalks and larger heads. Choose varieties under 90 days to maturity for the shortest-season areas.
Soil Considerations for Nebraska
Rich prairie soils in east. Sandy soils in Sandhills region. Loess deposits along Missouri River. Make sure soil has warmed to at least 55°F before planting sunflowers outside.
Nebraska Climate & Growing Season
Continental climate. Hot summers, cold winters. Adequate growing season in east. Drier in west — irrigation may be needed. Sunflowers cannot tolerate any frost, so wait until all frost danger has passed before transplanting outside. Watch local forecasts carefully in spring.
Growing season length varies across Nebraska: Northern/Western Nebraska (4a, 4b) has a last frost around May 5 - May 20, while Eastern Nebraska (5a, 5b) sees frost end around Apr 25 - May 10. This difference matters for sunflowers — transplant timing shifts by several weeks across the state.
Growing Tips
Direct sow is preferred — sunflowers don't love transplanting. Succession plant every 2 weeks for blooms all summer.
Companion Planting
Plant sunflowers alongside these companions for better growth:
Keep sunflowers away from:
The Bottom Line
Last reviewed: March 29, 2026