Tulsa, OK · zone 7b · ~218 frost-free days
When to plant a garden in Tulsa.
In Tulsa, the typical last spring frost lands around Mar 31 and the first fall frost around Nov 4, giving you about 218 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 Tulsa, keyed to your frost.
| Crop | Start indoors | Spring sow / set out | Fall sow |
|---|---|---|---|
| Tomato, slicing | Feb 24 to Apr 26 | Apr 7 to Jun 7 | — |
| Lettuce, leaf | — | Feb 21 to Apr 7 | Aug 21 to Oct 20 |
| Carrot | — | Feb 21 to Mar 26 | Aug 9 to Sep 4 |
| Bush Bean | — | Mar 31 to May 21 | Jul 21 to Aug 23 |
| Cucumber, slicing | — | Apr 7 to Jul 7 | Jul 4 to Aug 4 |
| Pepper, bell | Mar 5 to Apr 26 | Apr 16 to Jun 7 | — |
| Kale | Jan 10 to Feb 7 | Feb 21 to Mar 21 | Aug 4 to Sep 19 |
| Spinach | — | Feb 7 to Mar 21 | Aug 21 to Oct 9 |
Tulsa sits in Zone 7b, 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 Tulsa 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 74103 in about 60 seconds.