When to plant winter squash / pumpkin in Winnipeg
Winter squash / Pumpkin is frost-tender, so every date keys off Winnipeg's last spring frost of May 8.
Step 1 · Sow
Start seeds indoors
Apr 25 – May 16
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
Jun 13 – Jul 4
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
Sep 6 – Oct 11
Picking runs until conditions turn against the crop.
Window
Days to maturity
85 – 120 d
Winnipeg's 154-day season leaves this much room.
Winter squash / Pumpkin on Winnipeg'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
MAY 8
OCT 10
Common questions
When can I sow winter squash / pumpkin outdoors in Winnipeg?
Direct-sow around mid June (Jun 13–Jul 4) in Winnipeg, based on its local frost dates. Confidence 81%.
When will winter squash / pumpkin be ready to harvest in Winnipeg?
Expect to harvest from around early September (Sep 6–Oct 11) in Winnipeg, based on its local frost dates. Confidence 76%.
When should I start winter squash / pumpkin seeds indoors in Winnipeg?
Start seeds indoors around late April (Apr 25–May 16) in Winnipeg, based on its local frost dates. Confidence 80%.
When can I transplant winter squash / pumpkin outdoors in Winnipeg?
Transplant outdoors around mid June (Jun 13–Jul 4) in Winnipeg, based on its local frost dates. Confidence 81%.
How long is the growing season in Winnipeg?
Winnipeg has roughly 154 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 Winnipeg's frost dates.
Confidence 84/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.