When to plant swiss chard in Nagoya

Swiss chard is cold-hardy, so every date keys off Nagoya's frost dates of Apr 1.
Step 1 · Sow
Start seeds indoors
Mar 4 – Mar 25
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
Mar 18 – Apr 8
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
May 7 – May 17
Picking runs until conditions turn against the crop.
Step 4 · Second sowing
Autumn / second sowing
Sep 10 – Sep 24
A second window for a fall crop, timed to mature before the first frost.
Step 5 · Second harvest
Autumn crop harvest
Nov 6 – Nov 16
Maturity window for the second sowing.
Window
Days to maturity
50 – 60 d
Nagoya's 253-day season leaves this much room.
Swiss chard on Nagoya'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 1
DEC 9

Common questions

When can I sow swiss chard outdoors in Nagoya?

Direct-sow around mid March (Mar 18–Apr 8) in Nagoya, based on its local frost dates. Confidence 45%.

When will swiss chard be ready to harvest in Nagoya?

Expect to harvest from around early May (May 7–May 17) in Nagoya, based on its local frost dates. Confidence 40%.

When should I start swiss chard seeds indoors in Nagoya?

Start seeds indoors around early March (Mar 4–Mar 25) in Nagoya, based on its local frost dates. Confidence 43%.

When can I transplant swiss chard outdoors in Nagoya?

Transplant outdoors around mid March (Mar 18–Apr 8) in Nagoya, based on its local frost dates. Confidence 45%.

Can I plant swiss chard in autumn in Nagoya?

Yes — Nagoya supports a second, autumn sowing of swiss chard around early September (Sep 10–Sep 24), timed to mature before the first fall frost.

How long is the growing season in Nagoya?

Nagoya has roughly 253 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 Nagoya's frost dates.

Confidence 45/100 · Curated · based on NASA POWER (modeled) 1991–2020 · frost dates are probabilities, not guarantees.