Trenton, NJ · zone 7a · ~197 frost-free days
When to plant a garden in Trenton.
In Trenton, the typical last spring frost lands around Apr 15 and the first fall frost around Oct 29, giving you about 197 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 Trenton, keyed to your frost.
| Crop | Start indoors | Spring sow / set out | Fall sow |
|---|---|---|---|
| Tomato, slicing | Mar 11 to May 11 | Apr 22 to Jun 22 | — |
| Lettuce, leaf | — | Mar 8 to Apr 22 | Aug 15 to Oct 14 |
| Carrot | — | Mar 8 to Apr 10 | Aug 3 to Aug 29 |
| Bush Bean | — | Apr 15 to Jun 5 | Jul 15 to Aug 17 |
| Cucumber, slicing | — | Apr 22 to Jul 22 | Jun 28 to Jul 29 |
| Pepper, bell | Mar 20 to May 11 | May 1 to Jun 22 | — |
| Kale | Jan 25 to Feb 22 | Mar 8 to Apr 5 | Jul 29 to Sep 13 |
| Spinach | — | Feb 22 to Apr 5 | Aug 15 to Oct 3 |
Trenton sits in Zone 7a, 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 Trenton 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 08608 in about 60 seconds.