When to plant winter squash / pumpkin in Oklahoma City

Winter squash / Pumpkin is frost-tender, so every date keys off Oklahoma City's last spring frost of Apr 3.
Step 1 · Sow
Start seeds indoors
Mar 25 – Apr 15
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
Apr 27 – May 18
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
Jul 21 – Aug 25
Picking runs until conditions turn against the crop.
Window
Days to maturity
85 – 120 d
Oklahoma City's 223-day season leaves this much room.
Winter squash / Pumpkin on Oklahoma City'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
APR 3
NOV 5

Common questions

When can I sow winter squash / pumpkin outdoors in Oklahoma City?

Direct-sow around late April (Apr 27–May 18) in Oklahoma City, based on its local frost dates. Confidence 85%.

When will winter squash / pumpkin be ready to harvest in Oklahoma City?

Expect to harvest from around late July (Jul 21–Aug 25) in Oklahoma City, based on its local frost dates. Confidence 79%.

When should I start winter squash / pumpkin seeds indoors in Oklahoma City?

Start seeds indoors around late March (Mar 25–Apr 15) in Oklahoma City, based on its local frost dates. Confidence 84%.

When can I transplant winter squash / pumpkin outdoors in Oklahoma City?

Transplant outdoors around late April (Apr 27–May 18) in Oklahoma City, based on its local frost dates. Confidence 85%.

How long is the growing season in Oklahoma City?

Oklahoma City has roughly 223 frost-free days, which is enough time to grow winter squash / pumpkin to maturity outdoors.

The rule of thumb

Sow winter squash / pumpkin 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 Oklahoma City's frost dates.

Confidence 88/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.