Oklahoma · zones 6b–7b
When to plant garlic in Oklahoma.
Oklahoma's window for garlic runs on the fall side of the season. A second, fall sowing fits Oct 4 to Nov 19. Dates below are state medians; your ZIP code shifts them by days to weeks.
The 2026 windows
Garlic dates for a typical Oklahoma season.
Fall round
Oct 4 to Nov 19
Counted back from the ~Nov 4 first frost.
Harvest
~240 days later
~0.2 lb per plant over ~1 weeks.
Oklahoma spans more than one climate: Zone 7 is the most common zone, but the state runs 6b 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.