When to plant winter squash / pumpkin in Cleveland
Winter squash / Pumpkin is frost-tender, so every date keys off Cleveland's last spring frost of Apr 5.
Step 1 · Sow
Start seeds indoors
Mar 27 – Apr 17
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
May 28 – Jun 18
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
Aug 21 – Sep 25
Picking runs until conditions turn against the crop.
Window
Days to maturity
85 – 120 d
Cleveland's 227-day season leaves this much room.
Winter squash / Pumpkin on Cleveland'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
APR 5
NOV 16
Common questions
When can I sow winter squash / pumpkin outdoors in Cleveland?
Direct-sow around late May (May 28–Jun 18) in Cleveland, based on its local frost dates. Confidence 81%.
When will winter squash / pumpkin be ready to harvest in Cleveland?
Expect to harvest from around late August (Aug 21–Sep 25) in Cleveland, based on its local frost dates. Confidence 76%.
When should I start winter squash / pumpkin seeds indoors in Cleveland?
Start seeds indoors around late March (Mar 27–Apr 17) in Cleveland, based on its local frost dates. Confidence 80%.
When can I transplant winter squash / pumpkin outdoors in Cleveland?
Transplant outdoors around late May (May 28–Jun 18) in Cleveland, based on its local frost dates. Confidence 81%.
How long is the growing season in Cleveland?
Cleveland has roughly 227 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 Cleveland's frost dates.
Confidence 84/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.