When to plant melon (cantaloupe/watermelon) in Christchurch

Melon (cantaloupe/watermelon) is frost-tender, so every date keys off Christchurch's last spring frost of Oct 10.
Step 1 · Sow
Start seeds indoors
Sep 19 – Oct 10
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
Oct 24 – Nov 14
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
Jan 7 – Feb 1
Picking runs until conditions turn against the crop.
Window
Days to maturity
75 – 100 d
Christchurch's 192-day season leaves this much room.
Melon (cantaloupe/watermelon) 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 10
APR 20

Common questions

When can I sow melon (cantaloupe/watermelon) outdoors in Christchurch?

Direct-sow around late October (Oct 24–Nov 14) in Christchurch, based on its local frost dates. Confidence 80%.

When will melon (cantaloupe/watermelon) be ready to harvest in Christchurch?

Expect to harvest from around early January (Jan 7–Feb 1) in Christchurch, based on its local frost dates. Confidence 72%.

When should I start melon (cantaloupe/watermelon) seeds indoors in Christchurch?

Start seeds indoors around mid September (Sep 19–Oct 10) in Christchurch, based on its local frost dates. Confidence 76%.

When can I transplant melon (cantaloupe/watermelon) outdoors in Christchurch?

Transplant outdoors around late October (Oct 24–Nov 14) 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 melon (cantaloupe/watermelon) to maturity outdoors.

The rule of thumb

Sow melon (cantaloupe/watermelon) 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 80/100 · NOAA GHCN-Daily · 1991–2020 normals · frost dates are probabilities, not guarantees.