When to plant sweet corn in Tulsa
Sweet corn is frost-tender, so every date keys off Tulsa's last spring frost of Mar 31.
Step 1 · Sow
Direct sow outdoors
Apr 26 – May 17
Sow straight into warm, workable soil.
Step 2 · Harvest
Harvest window
Jun 25 – Aug 4
Picking runs until conditions turn against the crop.
Window
Days to maturity
60 – 100 d
Tulsa's 214-day season leaves this much room.
Sweet corn on Tulsa's growing year
Frost-bounded season with crops mapped onto the 12-month axis.
Frost risk Growing Harvest
JAN
FEB
MAR
APR
MAY
JUN
JUL
AUG
SEP
OCT
NOV
DEC
FROST
FROST
HARVEST
MAR 31
NOV 3
Common questions
When can I sow sweet corn outdoors in Tulsa?
Direct-sow around late April (Apr 26–May 17) in Tulsa, based on its local frost dates. Confidence 85%.
When will sweet corn be ready to harvest in Tulsa?
Expect to harvest from around late June (Jun 25–Aug 4) in Tulsa, based on its local frost dates. Confidence 79%.
How long is the growing season in Tulsa?
Tulsa has roughly 214 frost-free days, which is enough time to grow sweet corn to maturity outdoors.
The rule of thumb
Sow sweet corn 6–8 weeks before your last spring frost; plant out 2–3 weeks after it. Every date on this page is derived from that rule and Tulsa's frost dates.
Confidence 88/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.