When to plant leek in Wellington
Leek is cold-hardy, so every date keys off Wellington's frost dates of Sep 1.
Step 1 · Sow
Start seeds indoors
Jun 23 – Jul 14
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
Aug 18 – Sep 8
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
Nov 26 – Dec 16
Picking runs until conditions turn against the crop.
Window
Days to maturity
100 – 120 d
Wellington's 273-day season leaves this much room.
Leek 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
FROST
SEP 1
JUN 1
Common questions
When will leek be ready to harvest in Wellington?
Expect to harvest from around late November (Nov 26–Dec 16) in Wellington, based on its local frost dates. Confidence 72%.
When should I start leek seeds indoors in Wellington?
Start seeds indoors around late June (Jun 23–Jul 14) in Wellington, based on its local frost dates. Confidence 76%.
When can I transplant leek outdoors in Wellington?
Transplant outdoors around mid August (Aug 18–Sep 8) in Wellington, based on its local frost dates. Confidence 80%.
How long is the growing season in Wellington?
Wellington has roughly 273 frost-free days, which is enough time to grow leek to maturity outdoors.
The rule of thumb
Sow leek 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 Wellington's frost dates.
Confidence 80/100 · NOAA GHCN-Daily · 1991–2020 normals · frost dates are probabilities, not guarantees.