When to plant swiss chard in Fremont

Swiss chard is cold-hardy, so every date keys off Fremont's frost dates of Feb 25.
Step 1 · Sow
Start seeds indoors
Jan 28 – Feb 18
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
Feb 11 – Mar 4
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
Apr 2 – Apr 12
Picking runs until conditions turn against the crop.
Step 4 · Second sowing
Autumn / second sowing
Aug 26 – Sep 9
A second window for a fall crop, timed to mature before the first frost.
Step 5 · Second harvest
Autumn crop harvest
Oct 22 – Nov 1
Maturity window for the second sowing.
Window
Days to maturity
50 – 60 d
Fremont's 277-day season leaves this much room.
Swiss chard on Fremont'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 25
NOV 29

Common questions

When can I sow swiss chard outdoors in Fremont?

Direct-sow around mid February (Feb 11–Mar 4) in Fremont, based on its local frost dates. Confidence 80%.

When will swiss chard be ready to harvest in Fremont?

Expect to harvest from around early April (Apr 2–Apr 12) in Fremont, based on its local frost dates. Confidence 72%.

When should I start swiss chard seeds indoors in Fremont?

Start seeds indoors around late January (Jan 28–Feb 18) in Fremont, based on its local frost dates. Confidence 76%.

When can I transplant swiss chard outdoors in Fremont?

Transplant outdoors around mid February (Feb 11–Mar 4) in Fremont, based on its local frost dates. Confidence 80%.

Can I plant swiss chard in autumn in Fremont?

Yes — Fremont supports a second, autumn sowing of swiss chard around late August (Aug 26–Sep 9), timed to mature before the first fall frost.

How long is the growing season in Fremont?

Fremont has roughly 277 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 Fremont's frost dates.

Confidence 80/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.