When to plant summer squash / zucchini in Wellington

Summer squash / Zucchini is frost-tender, so every date keys off Wellington's last spring frost of Sep 19.
Step 1 · Sow
Start seeds indoors
Oct 15 – Nov 5
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
Dec 15 – Jan 5
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
Jan 29 – Feb 13
Picking runs until conditions turn against the crop.
Window
Days to maturity
45 – 60 d
Wellington's 256-day season leaves this much room.
Summer squash / Zucchini on Wellington'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
SEP 19
JUN 2

Common questions

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

Direct-sow around mid December (Dec 15–Jan 5) in Wellington, based on its local frost dates. Confidence 48%.

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

Expect to harvest from around late January (Jan 29–Feb 13) in Wellington, based on its local frost dates. Confidence 45%.

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

Start seeds indoors around mid October (Oct 15–Nov 5) in Wellington, based on its local frost dates. Confidence 48%.

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

Transplant outdoors around mid December (Dec 15–Jan 5) in Wellington, based on its local frost dates. Confidence 48%.

How long is the growing season in Wellington?

Wellington has roughly 256 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 Wellington's frost dates.

Confidence 50/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.