When to plant cauliflower in Christchurch

Cauliflower is cold-hardy, so every date keys off Christchurch's frost dates of Oct 16.
Step 1 · Sow
Start seeds indoors
Sep 4 – Sep 25
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
Oct 2 – Oct 23
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
Dec 1 – Dec 26
Picking runs until conditions turn against the crop.
Step 4 · Second sowing
Autumn / second sowing
Jan 6 – Jan 20
A second window for a fall crop, timed to mature before the first frost.
Step 5 · Second harvest
Autumn crop harvest
Mar 14 – Apr 8
Maturity window for the second sowing.
Window
Days to maturity
60 – 85 d
Christchurch's 211-day season leaves this much room.
Cauliflower 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 will cauliflower be ready to harvest in Christchurch?

Expect to harvest from around early December (Dec 1–Dec 26) in Christchurch, based on its local frost dates. Confidence 40%.

When should I start cauliflower seeds indoors in Christchurch?

Start seeds indoors around early September (Sep 4–Sep 25) in Christchurch, based on its local frost dates. Confidence 43%.

When can I transplant cauliflower outdoors in Christchurch?

Transplant outdoors around early October (Oct 2–Oct 23) in Christchurch, based on its local frost dates. Confidence 45%.

Can I plant cauliflower in autumn in Christchurch?

Yes — Christchurch supports a second, autumn sowing of cauliflower around early January (Jan 6–Jan 20), timed to mature before the first fall frost.

How long is the growing season in Christchurch?

Christchurch has roughly 211 frost-free days, which is enough time to grow cauliflower to maturity outdoors.

The rule of thumb

Sow cauliflower as soon as the soil is workable — it tolerates cool weather and light frost. 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.