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When to plant summer squash / zucchini in Kansas City

Summer squash / Zucchini is frost-tender, so every date keys off Kansas City's last spring frost of Apr 3.
Step 1 · Sow
Start seeds indoors
Apr 1 – Apr 22
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
May 10 – May 31
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
Jun 24 – Jul 9
Picking runs until conditions turn against the crop.
Window
Days to maturity
45 – 60 d
Kansas City's 212-day season leaves this much room.
Summer squash / Zucchini on Kansas City'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
APR 3
OCT 30

Common questions

When can I sow summer squash / zucchini outdoors in Kansas City?

Direct-sow around early May (May 10–May 31) in Kansas City, based on its local frost dates. Confidence 84%.

When will summer squash / zucchini be ready to harvest in Kansas City?

Expect to harvest from around late June (Jun 24–Jul 9) in Kansas City, based on its local frost dates. Confidence 78%.

When should I start summer squash / zucchini seeds indoors in Kansas City?

Start seeds indoors around early April (Apr 1–Apr 22) in Kansas City, based on its local frost dates. Confidence 83%.

When can I transplant summer squash / zucchini outdoors in Kansas City?

Transplant outdoors around early May (May 10–May 31) in Kansas City, based on its local frost dates. Confidence 84%.

How long is the growing season in Kansas City?

Kansas City has roughly 212 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 Kansas City's frost dates.

Confidence 87/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.
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