Cheyenne, WY · zone 5a · ~137 frost-free days
When to plant a garden in Cheyenne.
In Cheyenne, the typical last spring frost lands around May 15 and the first fall frost around Sep 29, giving you about 137 frost-free days. Cool-season crops go out before the last frost; warm-season crops wait until after it.
The 2026 windows
Sow dates for Cheyenne, keyed to your frost.
| Crop | Start indoors | Spring sow / set out | Fall sow |
|---|---|---|---|
| Tomato, slicing | Apr 10 to Jun 10 | May 22 to Jul 22 | — |
| Lettuce, leaf | — | Apr 7 to May 22 | Jul 16 to Sep 14 |
| Carrot | — | Apr 7 to May 10 | Jul 4 to Jul 30 |
| Bush Bean | — | May 15 to Jul 5 | Jun 15 to Jul 18 |
| Cucumber, slicing | — | May 22 to Aug 21 | May 29 to Jun 29 |
| Pepper, bell | Apr 19 to Jun 10 | May 31 to Jul 22 | — |
| Kale | Feb 24 to Mar 24 | Apr 7 to May 5 | Jun 29 to Aug 14 |
| Spinach | — | Mar 24 to May 5 | Jul 16 to Sep 3 |
Cheyenne sits in Zone 5a, but two gardens in the same city can be a week or two apart. The planner works from your ZIP code's frost dates, not the zone, so the dates land right for your block, not the metro average.
Build your Cheyenne garden plan.
Tell the free planner what you want to eat and who you're feeding. It returns plant counts, spacing, and frost-safe sow dates for ZIP 82001 in about 60 seconds.