Chattanooga, TN · zone 7b · ~221 frost-free days
When to plant a garden in Chattanooga.
In Chattanooga, the typical last spring frost lands around Mar 30 and the first fall frost around Nov 6, giving you about 221 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 Chattanooga, keyed to your frost.
| Crop | Start indoors | Spring sow / set out | Fall sow |
|---|---|---|---|
| Tomato, slicing | Feb 23 to Apr 25 | Apr 6 to Jun 6 | — |
| Lettuce, leaf | — | Feb 20 to Apr 6 | Aug 23 to Oct 22 |
| Carrot | — | Feb 20 to Mar 25 | Aug 11 to Sep 6 |
| Bush Bean | — | Mar 30 to May 20 | Jul 23 to Aug 25 |
| Cucumber, slicing | — | Apr 6 to Jul 6 | Jul 6 to Aug 6 |
| Pepper, bell | Mar 4 to Apr 25 | Apr 15 to Jun 6 | — |
| Kale | Jan 9 to Feb 6 | Feb 20 to Mar 20 | Aug 6 to Sep 21 |
| Spinach | — | Feb 6 to Mar 20 | Aug 23 to Oct 11 |
Chattanooga 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 Chattanooga 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 37402 in about 60 seconds.