When to plant summer squash / zucchini in Saint Paul

Summer squash / Zucchini is frost-tender, so every date keys off Saint Paul's last spring frost of Apr 22.
Step 1 · Sow
Start seeds indoors
Apr 20 – May 11
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
Jun 2 – Jun 23
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
Jul 17 – Aug 1
Picking runs until conditions turn against the crop.
Window
Days to maturity
45 – 60 d
Saint Paul's 174-day season leaves this much room.
Summer squash / Zucchini on Saint Paul'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 22
OCT 12

Common questions

When can I sow summer squash / zucchini outdoors in Saint Paul?

Direct-sow around early June (Jun 2–Jun 23) in Saint Paul, based on its local frost dates. Confidence 81%.

When will summer squash / zucchini be ready to harvest in Saint Paul?

Expect to harvest from around mid July (Jul 17–Aug 1) in Saint Paul, based on its local frost dates. Confidence 76%.

When should I start summer squash / zucchini seeds indoors in Saint Paul?

Start seeds indoors around mid April (Apr 20–May 11) in Saint Paul, based on its local frost dates. Confidence 80%.

When can I transplant summer squash / zucchini outdoors in Saint Paul?

Transplant outdoors around early June (Jun 2–Jun 23) in Saint Paul, based on its local frost dates. Confidence 81%.

How long is the growing season in Saint Paul?

Saint Paul has roughly 174 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 Saint Paul's frost dates.

Confidence 84/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.