When to plant swiss chard in Stockton

Swiss chard is cold-hardy, so every date keys off Stockton's frost dates of Feb 12.
Step 1 · Sow
Start seeds indoors
Jan 15 – Feb 5
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
Dec 26 – Jan 16
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
Feb 14 – Feb 24
Picking runs until conditions turn against the crop.
Step 4 · Second sowing
Autumn / second sowing
Aug 22 – Sep 5
A second window for a fall crop, timed to mature before the first frost.
Step 5 · Second harvest
Autumn crop harvest
Oct 18 – Oct 28
Maturity window for the second sowing.
Window
Days to maturity
50 – 60 d
Stockton's 284-day season leaves this much room.
Swiss chard on Stockton'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
FEB 12
NOV 27

Common questions

When can I sow swiss chard outdoors in Stockton?

Direct-sow around late December (Dec 26–Jan 16) in Stockton, based on its local frost dates. Confidence 85%.

When will swiss chard be ready to harvest in Stockton?

Expect to harvest from around mid February (Feb 14–Feb 24) in Stockton, based on its local frost dates. Confidence 79%.

When should I start swiss chard seeds indoors in Stockton?

Start seeds indoors around mid January (Jan 15–Feb 5) in Stockton, based on its local frost dates. Confidence 84%.

When can I transplant swiss chard outdoors in Stockton?

Transplant outdoors around late December (Dec 26–Jan 16) in Stockton, based on its local frost dates. Confidence 85%.

Can I plant swiss chard in autumn in Stockton?

Yes — Stockton supports a second, autumn sowing of swiss chard around late August (Aug 22–Sep 5), timed to mature before the first fall frost.

How long is the growing season in Stockton?

Stockton has roughly 284 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 Stockton's frost dates.

Confidence 88/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.