When to plant winter squash / pumpkin in Christchurch

Winter squash / Pumpkin is frost-tender, so every date keys off Christchurch's last spring frost of Oct 16.
Step 1 · Sow
Start seeds indoors
Oct 17 – Nov 7
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
Dec 21 – Jan 11
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
Mar 16 – Apr 20
Picking runs until conditions turn against the crop.
Window
Days to maturity
85 – 120 d
Christchurch's 211-day season leaves this much room.
Winter squash / Pumpkin on Christchurch'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
OCT 16
MAY 19

Common questions

When can I sow winter squash / pumpkin outdoors in Christchurch?

Direct-sow around late December (Dec 21–Jan 11) in Christchurch, based on its local frost dates. Confidence 44%.

When will winter squash / pumpkin be ready to harvest in Christchurch?

Expect to harvest from around mid March (Mar 16–Apr 20) in Christchurch, based on its local frost dates. Confidence 40%.

When should I start winter squash / pumpkin seeds indoors in Christchurch?

Start seeds indoors around mid October (Oct 17–Nov 7) in Christchurch, based on its local frost dates. Confidence 43%.

When can I transplant winter squash / pumpkin outdoors in Christchurch?

Transplant outdoors around late December (Dec 21–Jan 11) in Christchurch, based on its local frost dates. Confidence 44%.

How long is the growing season in Christchurch?

Christchurch has roughly 211 frost-free days, which is enough time to grow winter squash / pumpkin to maturity outdoors.

The rule of thumb

Sow winter squash / pumpkin 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 Christchurch's frost dates.

Confidence 45/100 · Curated · based on NASA POWER (modeled) 1991–2020 · frost dates are probabilities, not guarantees.