When to plant winter squash / pumpkin in Birmingham
Winter squash / Pumpkin is frost-tender, so every date keys off Birmingham's last spring frost of Mar 27.
Step 1 · Sow
Start seeds indoors
Mar 21 – Apr 11
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
Apr 18 – May 9
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
Jul 12 – Aug 16
Picking runs until conditions turn against the crop.
Window
Days to maturity
85 – 120 d
Birmingham's 229-day season leaves this much room.
Winter squash / Pumpkin on Birmingham'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 27
NOV 11
Common questions
When can I sow winter squash / pumpkin outdoors in Birmingham?
Direct-sow around mid April (Apr 18–May 9) in Birmingham, based on its local frost dates. Confidence 89%.
When will winter squash / pumpkin be ready to harvest in Birmingham?
Expect to harvest from around mid July (Jul 12–Aug 16) in Birmingham, based on its local frost dates. Confidence 80%.
When should I start winter squash / pumpkin seeds indoors in Birmingham?
Start seeds indoors around late March (Mar 21–Apr 11) in Birmingham, based on its local frost dates. Confidence 85%.
When can I transplant winter squash / pumpkin outdoors in Birmingham?
Transplant outdoors around mid April (Apr 18–May 9) in Birmingham, based on its local frost dates. Confidence 89%.
How long is the growing season in Birmingham?
Birmingham has roughly 229 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 Birmingham's frost dates.
Confidence 89/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.