When to plant swiss chard in Anchorage

Swiss chard is cold-hardy, so every date keys off Anchorage's frost dates of Apr 30.
Step 1 · Sow
Start seeds indoors
Apr 2 – Apr 23
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
Jun 28 – Jul 8
Picking runs until conditions turn against the crop.
Step 4 · Second sowing
Autumn / second sowing
Jun 23 – Jul 7
A second window for a fall crop, timed to mature before the first frost.
Step 5 · Second harvest
Autumn crop harvest
Aug 19 – Aug 29
Maturity window for the second sowing.
Window
Days to maturity
50 – 60 d
Anchorage's 148-day season leaves this much room.
Swiss chard 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
APR 30
SEP 26

Common questions

When can I sow swiss chard outdoors in Anchorage?

Direct-sow around early May (May 9–May 30) in Anchorage, based on its local frost dates. Confidence 82%.

When will swiss chard be ready to harvest in Anchorage?

Expect to harvest from around late June (Jun 28–Jul 8) in Anchorage, based on its local frost dates. Confidence 76%.

When should I start swiss chard seeds indoors in Anchorage?

Start seeds indoors around early April (Apr 2–Apr 23) in Anchorage, based on its local frost dates. Confidence 81%.

When can I transplant swiss chard outdoors in Anchorage?

Transplant outdoors around early May (May 9–May 30) in Anchorage, based on its local frost dates. Confidence 82%.

Can I plant swiss chard in autumn in Anchorage?

Yes — Anchorage supports a second, autumn sowing of swiss chard around late June (Jun 23–Jul 7), timed to mature before the first fall frost.

How long is the growing season in Anchorage?

Anchorage has roughly 148 frost-free days, which is enough time to grow swiss chard to maturity outdoors.

The rule of thumb

Sow swiss chard 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.