When to plant leek in Anchorage
Leek is cold-hardy, so every date keys off Anchorage's frost dates of Apr 30.
Step 1 · Sow
Start seeds indoors
Feb 19 – Mar 12
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
May 9 – May 30
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
Aug 17 – Sep 6
Picking runs until conditions turn against the crop.
Window
Days to maturity
100 – 120 d
Anchorage's 148-day season leaves this much room.
Leek on Anchorage'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
FROST
APR 30
SEP 26
Common questions
When will leek be ready to harvest in Anchorage?
Expect to harvest from around mid August (Aug 17–Sep 6) in Anchorage, based on its local frost dates. Confidence 76%.
When should I start leek seeds indoors in Anchorage?
Start seeds indoors around mid February (Feb 19–Mar 12) in Anchorage, based on its local frost dates. Confidence 81%.
When can I transplant leek outdoors in Anchorage?
Transplant outdoors around early May (May 9–May 30) in Anchorage, based on its local frost dates. Confidence 82%.
How long is the growing season in Anchorage?
Anchorage has roughly 148 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 Anchorage's frost dates.
Confidence 85/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.