When to plant leek in Wellington
Leek is cold-hardy, so every date keys off Wellington's frost dates of Sep 19.
Step 1 · Sow
Start seeds indoors
Jul 11 – Aug 1
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
Sep 5 – Sep 26
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
Dec 14 – Jan 3
Picking runs until conditions turn against the crop.
Window
Days to maturity
100 – 120 d
Wellington's 256-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 19
JUN 2
Common questions
When will leek be ready to harvest in Wellington?
Expect to harvest from around mid December (Dec 14–Jan 3) in Wellington, based on its local frost dates. Confidence 45%.
When should I start leek seeds indoors in Wellington?
Start seeds indoors around mid July (Jul 11–Aug 1) in Wellington, based on its local frost dates. Confidence 48%.
When can I transplant leek outdoors in Wellington?
Transplant outdoors around early September (Sep 5–Sep 26) in Wellington, based on its local frost dates. Confidence 50%.
How long is the growing season in Wellington?
Wellington has roughly 256 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 50/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.