When to plant swiss chard in Jacksonville

Swiss chard is cold-hardy, so every date keys off Jacksonville's frost dates of Feb 9.
Step 1 · Sow
Start seeds indoors
Jan 12 – Feb 2
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
Jan 26 – Feb 16
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
Mar 17 – Mar 27
Picking runs until conditions turn against the crop.
Step 4 · Second sowing
Autumn / second sowing
Sep 19 – Oct 3
A second window for a fall crop, timed to mature before the first frost.
Step 5 · Second harvest
Autumn crop harvest
Nov 15 – Nov 25
Maturity window for the second sowing.
Window
Days to maturity
50 – 60 d
Jacksonville's 311-day season leaves this much room.
Swiss chard on Jacksonville'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 9
DEC 17

Common questions

When can I sow swiss chard outdoors in Jacksonville?

Direct-sow around late January (Jan 26–Feb 16) in Jacksonville, based on its local frost dates. Confidence 84%.

When will swiss chard be ready to harvest in Jacksonville?

Expect to harvest from around mid March (Mar 17–Mar 27) in Jacksonville, based on its local frost dates. Confidence 76%.

When should I start swiss chard seeds indoors in Jacksonville?

Start seeds indoors around mid January (Jan 12–Feb 2) in Jacksonville, based on its local frost dates. Confidence 80%.

When can I transplant swiss chard outdoors in Jacksonville?

Transplant outdoors around late January (Jan 26–Feb 16) in Jacksonville, based on its local frost dates. Confidence 84%.

Can I plant swiss chard in autumn in Jacksonville?

Yes — Jacksonville supports a second, autumn sowing of swiss chard around mid September (Sep 19–Oct 3), timed to mature before the first fall frost.

How long is the growing season in Jacksonville?

Jacksonville has roughly 311 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 Jacksonville's frost dates.

Confidence 84/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.