Delaware · zones 7b–7b
When to plant kale in Delaware.
Sow or transplant between Mar 5 to Apr 2 in a typical year, keyed to Delaware's median last frost around Apr 12. A second, fall sowing fits Aug 1 to Sep 16. Dates below are state medians; your ZIP code shifts them by days to weeks.
The 2026 windows
Kale dates for a typical Delaware season.
1 · Start indoors
Jan 22 to Feb 19
About 6 weeks before set-out. Warm spot, real light.
2 · Set out
Mar 5 to Apr 2
Keyed to the ~Apr 12 last frost. Sow 0.25" deep, 16" apart.
Fall round
Aug 1 to Sep 16
Counted back from the ~Nov 1 first frost.
Harvest
~45 days later
~2 lb per plant over ~16 weeks.
Delaware spans more than one climate: Zone 7 is the most common zone, but the state runs 7b to 7b. That's why the planner works from your ZIP code's frost dates, not your zone — mountain and coastal gardens in the same state can be three weeks apart.