When to plant summer squash / zucchini in Colorado Springs

Summer squash / Zucchini is frost-tender, so every date keys off Colorado Springs's last spring frost of May 5.
Step 1 · Sow
Start seeds indoors
May 6 – May 27
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
Jul 24 – Aug 8
Picking runs until conditions turn against the crop.
Window
Days to maturity
45 – 60 d
Colorado Springs's 153-day season leaves this much room.
Summer squash / Zucchini 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 summer squash / zucchini 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 summer squash / zucchini be ready to harvest in Colorado Springs?

Expect to harvest from around late July (Jul 24–Aug 8) in Colorado Springs, based on its local frost dates. Confidence 79%.

When should I start summer squash / zucchini seeds indoors in Colorado Springs?

Start seeds indoors around early May (May 6–May 27) in Colorado Springs, based on its local frost dates. Confidence 84%.

When can I transplant summer squash / zucchini 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 summer squash / zucchini to maturity outdoors.

The rule of thumb

Sow summer squash / zucchini 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.