When to plant swiss chard in Newark

Swiss chard is cold-hardy, so every date keys off Newark's frost dates of Apr 3.
Step 1 · Sow
Start seeds indoors
Mar 6 – Mar 27
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
Apr 6 – Apr 27
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
May 26 – Jun 5
Picking runs until conditions turn against the crop.
Step 4 · Second sowing
Autumn / second sowing
Aug 13 – Aug 27
A second window for a fall crop, timed to mature before the first frost.
Step 5 · Second harvest
Autumn crop harvest
Oct 9 – Oct 19
Maturity window for the second sowing.
Window
Days to maturity
50 – 60 d
Newark's 223-day season leaves this much room.
Swiss chard on Newark'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 3
NOV 11

Common questions

When can I sow swiss chard outdoors in Newark?

Direct-sow around early April (Apr 6–Apr 27) in Newark, based on its local frost dates. Confidence 83%.

When will swiss chard be ready to harvest in Newark?

Expect to harvest from around late May (May 26–Jun 5) in Newark, based on its local frost dates. Confidence 77%.

When should I start swiss chard seeds indoors in Newark?

Start seeds indoors around early March (Mar 6–Mar 27) in Newark, based on its local frost dates. Confidence 82%.

When can I transplant swiss chard outdoors in Newark?

Transplant outdoors around early April (Apr 6–Apr 27) in Newark, based on its local frost dates. Confidence 83%.

Can I plant swiss chard in autumn in Newark?

Yes — Newark supports a second, autumn sowing of swiss chard around mid August (Aug 13–Aug 27), timed to mature before the first fall frost.

How long is the growing season in Newark?

Newark has roughly 223 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 Newark's frost dates.

Confidence 86/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.