When to plant kale in Christchurch
Kale is cold-hardy, so every date keys off Christchurch's frost dates of Oct 10.
Step 1 · Sow
Start seeds indoors
Aug 29 – Sep 19
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
Sep 19 – Oct 10
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
Nov 13 – Dec 3
Picking runs until conditions turn against the crop.
Window
Days to maturity
55 – 75 d
Christchurch's 192-day season leaves this much room.
Kale 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
FROST
OCT 10
APR 20
Common questions
When can I sow kale outdoors in Christchurch?
Direct-sow around mid September (Sep 19–Oct 10) in Christchurch, based on its local frost dates. Confidence 80%.
When will kale be ready to harvest in Christchurch?
Expect to harvest from around mid November (Nov 13–Dec 3) in Christchurch, based on its local frost dates. Confidence 72%.
When should I start kale seeds indoors in Christchurch?
Start seeds indoors around late August (Aug 29–Sep 19) in Christchurch, based on its local frost dates. Confidence 76%.
When can I transplant kale outdoors in Christchurch?
Transplant outdoors around mid September (Sep 19–Oct 10) in Christchurch, based on its local frost dates. Confidence 80%.
How long is the growing season in Christchurch?
Christchurch has roughly 192 frost-free days, which is enough time to grow kale to maturity outdoors.
The rule of thumb
Sow kale 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 80/100 · NOAA GHCN-Daily · 1991–2020 normals · frost dates are probabilities, not guarantees.