When to plant sweet corn in Anchorage
Sweet corn is frost-tender, so every date keys off Anchorage's last spring frost of Apr 30.
Step 1 · Sow
Direct sow outdoors
Jul 13 – Aug 3
Sow straight into warm, workable soil.
Step 2 · Harvest
Harvest window
Sep 11 – Oct 21
Picking runs until conditions turn against the crop.
Window
Days to maturity
60 – 100 d
Anchorage's 148-day season leaves this much room.
Sweet corn 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
HARVEST
APR 30
SEP 26
Common questions
When can I sow sweet corn outdoors in Anchorage?
Direct-sow around mid July (Jul 13–Aug 3) in Anchorage, based on its local frost dates. Confidence 82%.
When will sweet corn be ready to harvest in Anchorage?
Expect to harvest from around mid September (Sep 11–Oct 21) in Anchorage, based on its local frost dates. Confidence 76%.
How long is the growing season in Anchorage?
Anchorage has roughly 148 frost-free days, which is enough time to grow sweet corn to maturity outdoors.
The rule of thumb
Sow sweet corn 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 Anchorage's frost dates.
Confidence 85/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.