When to plant summer squash / zucchini in Huntsville

Summer squash / Zucchini is frost-tender, so every date keys off Huntsville's last spring frost of Mar 27.
Step 1 · Sow
Start seeds indoors
Mar 25 – Apr 15
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
Apr 19 – May 10
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
Jun 3 – Jun 18
Picking runs until conditions turn against the crop.
Window
Days to maturity
45 – 60 d
Huntsville's 228-day season leaves this much room.
Summer squash / Zucchini on Huntsville'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
MAR 27
NOV 4

Common questions

When can I sow summer squash / zucchini outdoors in Huntsville?

Direct-sow around mid April (Apr 19–May 10) in Huntsville, based on its local frost dates. Confidence 85%.

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

Expect to harvest from around early June (Jun 3–Jun 18) in Huntsville, based on its local frost dates. Confidence 79%.

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

Start seeds indoors around late March (Mar 25–Apr 15) in Huntsville, based on its local frost dates. Confidence 84%.

When can I transplant summer squash / zucchini outdoors in Huntsville?

Transplant outdoors around mid April (Apr 19–May 10) in Huntsville, based on its local frost dates. Confidence 85%.

How long is the growing season in Huntsville?

Huntsville has roughly 228 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 Huntsville's frost dates.

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