Kansas · zones 5b–7a
When to plant spinach in Kansas.
Sow between Feb 21 to Apr 4 in a typical year, keyed to Kansas's median last frost around Apr 14. A second, fall sowing fits Aug 8 to Sep 26. Dates below are state medians; your ZIP code shifts them by days to weeks.
The 2026 windows
Spinach dates for a typical Kansas season.
Direct sow
Feb 21 to Apr 4
Keyed to the ~Apr 14 last frost. Sow 0.5" deep, 3" apart.
Fall round
Aug 8 to Sep 26
Counted back from the ~Oct 22 first frost.
Harvest
~42 days later
~0.25 lb per plant over ~1 weeks.
Kansas spans more than one climate: Zone 6 is the most common zone, but the state runs 5b to 7a. 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.