When to plant swiss chard in Tacoma

Swiss chard is cold-hardy, so every date keys off Tacoma's frost dates of Mar 8.
Step 1 · Sow
Start seeds indoors
Feb 8 – Mar 1
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
Feb 22 – Mar 15
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
Apr 13 – Apr 23
Picking runs until conditions turn against the crop.
Step 4 · Second sowing
Autumn / second sowing
Aug 10 – Aug 24
A second window for a fall crop, timed to mature before the first frost.
Step 5 · Second harvest
Autumn crop harvest
Oct 6 – Oct 16
Maturity window for the second sowing.
Window
Days to maturity
50 – 60 d
Tacoma's 246-day season leaves this much room.
Swiss chard on Tacoma'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
MAR 8
NOV 13

Common questions

When can I sow swiss chard outdoors in Tacoma?

Direct-sow around late February (Feb 22–Mar 15) in Tacoma, based on its local frost dates. Confidence 85%.

When will swiss chard be ready to harvest in Tacoma?

Expect to harvest from around mid April (Apr 13–Apr 23) in Tacoma, based on its local frost dates. Confidence 76%.

When should I start swiss chard seeds indoors in Tacoma?

Start seeds indoors around early February (Feb 8–Mar 1) in Tacoma, based on its local frost dates. Confidence 81%.

When can I transplant swiss chard outdoors in Tacoma?

Transplant outdoors around late February (Feb 22–Mar 15) in Tacoma, based on its local frost dates. Confidence 85%.

Can I plant swiss chard in autumn in Tacoma?

Yes — Tacoma supports a second, autumn sowing of swiss chard around early August (Aug 10–Aug 24), timed to mature before the first fall frost.

How long is the growing season in Tacoma?

Tacoma has roughly 246 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 Tacoma's frost dates.

Confidence 85/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.