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When to plant swiss chard in Rochester

Swiss chard is cold-hardy, so every date keys off Rochester's frost dates of Apr 29.
Step 1 · Sow
Start seeds indoors
Apr 1 – Apr 22
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
Apr 22 – May 13
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
Jun 11 – Jun 21
Picking runs until conditions turn against the crop.
Step 4 · Second sowing
Autumn / second sowing
Jul 13 – Jul 27
A second window for a fall crop, timed to mature before the first frost.
Step 5 · Second harvest
Autumn crop harvest
Sep 8 – Sep 18
Maturity window for the second sowing.
Window
Days to maturity
50 – 60 d
Rochester's 173-day season leaves this much room.
Swiss chard on Rochester'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 29
OCT 24

Common questions

When can I sow swiss chard outdoors in Rochester?

Direct-sow around late April (Apr 22–May 13) in Rochester, based on its local frost dates. Confidence 86%.

When will swiss chard be ready to harvest in Rochester?

Expect to harvest from around mid June (Jun 11–Jun 21) in Rochester, based on its local frost dates. Confidence 80%.

When should I start swiss chard seeds indoors in Rochester?

Start seeds indoors around early April (Apr 1–Apr 22) in Rochester, based on its local frost dates. Confidence 85%.

When can I transplant swiss chard outdoors in Rochester?

Transplant outdoors around late April (Apr 22–May 13) in Rochester, based on its local frost dates. Confidence 86%.

Can I plant swiss chard in autumn in Rochester?

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

How long is the growing season in Rochester?

Rochester has roughly 173 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 Rochester's frost dates.

Confidence 89/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.
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