When to plant winter squash / pumpkin in Colorado Springs

Winter squash / Pumpkin is frost-tender, so every date keys off Colorado Springs's last spring frost of May 5.
Step 1 · Sow
Start seeds indoors
Apr 29 – May 20
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
Jun 9 – Jun 30
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
Sep 2 – Oct 7
Picking runs until conditions turn against the crop.
Window
Days to maturity
85 – 120 d
Colorado Springs's 153-day season leaves this much room.
Winter squash / Pumpkin on Colorado Springs'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
MAY 5
OCT 5

Common questions

When can I sow winter squash / pumpkin outdoors in Colorado Springs?

Direct-sow around early June (Jun 9–Jun 30) in Colorado Springs, based on its local frost dates. Confidence 85%.

When will winter squash / pumpkin be ready to harvest in Colorado Springs?

Expect to harvest from around early September (Sep 2–Oct 7) in Colorado Springs, based on its local frost dates. Confidence 79%.

When should I start winter squash / pumpkin seeds indoors in Colorado Springs?

Start seeds indoors around late April (Apr 29–May 20) in Colorado Springs, based on its local frost dates. Confidence 84%.

When can I transplant winter squash / pumpkin outdoors in Colorado Springs?

Transplant outdoors around early June (Jun 9–Jun 30) in Colorado Springs, based on its local frost dates. Confidence 85%.

How long is the growing season in Colorado Springs?

Colorado Springs has roughly 153 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 Colorado Springs's frost dates.

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