When to plant leek in Auckland
Leek is cold-hardy, so every date keys off Auckland's frost dates of Aug 20.
Step 1 · Sow
Start seeds indoors
Jun 11 – Jul 2
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
Aug 6 – Aug 27
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
Nov 14 – Dec 4
Picking runs until conditions turn against the crop.
Window
Days to maturity
100 – 120 d
Auckland's 294-day season leaves this much room.
Leek on Auckland'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
AUG 20
JUN 10
Common questions
When will leek be ready to harvest in Auckland?
Expect to harvest from around mid November (Nov 14–Dec 4) in Auckland, based on its local frost dates. Confidence 74%.
When should I start leek seeds indoors in Auckland?
Start seeds indoors around mid June (Jun 11–Jul 2) in Auckland, based on its local frost dates. Confidence 78%.
When can I transplant leek outdoors in Auckland?
Transplant outdoors around early August (Aug 6–Aug 27) in Auckland, based on its local frost dates. Confidence 82%.
How long is the growing season in Auckland?
Auckland has roughly 294 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 Auckland's frost dates.
Confidence 82/100 · NOAA GHCN-Daily · 1991–2020 normals · frost dates are probabilities, not guarantees.