Tulsa, OK · zone 7b · ~218 frost-free days
When to plant in Tulsa: frost dates and zone 7b.
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 | — |
| 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.
Tulsa planting questions
What planting zone is Tulsa, OK?+
Tulsa is in USDA hardiness zone 7b. Growing zone, gardening zone, and planting zone all mean the same thing: the USDA number, 7b here. It tells you what survives winter, not when to plant. Frost dates set your planting time, and the free planner uses your exact ZIP code's frost dates, which can differ by weeks across one metro.
When is the last frost date in Tulsa?+
The typical last spring frost in Tulsa, OK is around Mar 31. That is an average from local history, not a guarantee, so tender crops like tomatoes and peppers are safer with a week of buffer after it.
When is the first frost date in Tulsa?+
The typical first fall frost in Tulsa, OK arrives around Nov 4, closing a growing season of roughly 218 frost-free days. Count backward from it to find the last date a fall crop can still finish.
What can I plant now in Tulsa?+
It depends on the date. Cool-season crops like lettuce, kale, and spinach go out weeks before the last frost; warm-season crops like tomatoes and peppers wait until after Mar 31. The table above shows each crop's window; the free planner turns your ZIP into an exact, dated calendar.