When to Plant Cucumbers in Wyoming
Cool, crisp, and perfect for salads and pickling. Cucumbers thrive in warm weather and produce abundantly.
The Short Answer
Wyoming Frost Dates
Your planting dates depend on which part of Wyoming you're in. Here are the frost date ranges by region:
| Region | Zones | Last Frost (Spring) | First Frost (Fall) |
|---|---|---|---|
| Eastern Wyoming | 4a, 4b, 5a | May 10 - May 30 | Sep 10 - Sep 25 |
| Western Wyoming | 3a, 3b, 4a | May 25 - Jun 15 | Aug 25 - Sep 15 |
| Southern Wyoming | 4b, 5a, 5b | May 15 - Jun 1 | Sep 5 - Sep 20 |
Cucumbers Planting Schedule for Wyoming
Eastern Wyoming (Zones 4a, 4b, 5a)
Average last frost: May 10 - May 30 · Average first frost: Sep 10 - Sep 25
Western Wyoming (Zones 3a, 3b, 4a)
Average last frost: May 25 - Jun 15 · Average first frost: Aug 25 - Sep 15
Southern Wyoming (Zones 4b, 5a, 5b)
Average last frost: May 15 - Jun 1 · Average first frost: Sep 5 - Sep 20
Growing Cucumbers in Wyoming
Cucumbers in Wyoming's Climate
Cucumbers need warmth but mature quickly — 50-60 day varieties fit comfortably within your growing season. Start seeds indoors 3 weeks before last frost and transplant after soil reaches 60°F. Black plastic mulch warms soil for earlier transplanting. Row cover adds warmth during cool June nights. Choose cold-tolerant varieties like Marketmore and pick frequently to keep plants producing.
Soil Considerations for Wyoming
Alkaline, thin soils. Dry climate means little organic matter naturally. Wind erosion a significant challenge. Heavy amendment needed. Make sure soil has warmed to at least 60°F before planting cucumbers outside.
Wyoming Climate & Growing Season
Short growing season. Very windy — wind protection essential for gardens. Low humidity. Cool nights even in summer at elevation. Cucumbers 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 Wyoming: Eastern Wyoming (4a, 4b, 5a) has a last frost around May 10 - May 30, while Southern Wyoming (4b, 5a, 5b) sees frost end around May 15 - Jun 1. This difference matters for cucumbers — transplant timing shifts by several weeks across the state.
Growing Tips
Trellis for straighter fruits and better air circulation. Pick regularly to encourage more production.
Companion Planting
Plant cucumbers alongside these companions for better growth:
Keep cucumbers away from:
The Bottom Line
Last reviewed: March 29, 2026