When to plant swiss chard in Nagoya
Swiss chard is cold-hardy, so every date keys off Nagoya's frost dates of Mar 28.
Step 1 · Sow
Start seeds indoors
Feb 28 – Mar 21
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
Mar 14 – Apr 4
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
May 3 – May 13
Picking runs until conditions turn against the crop.
Window
Days to maturity
50 – 60 d
Nagoya's 247-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
FROST
FROST
MAR 28
NOV 30
Common questions
When can I sow swiss chard outdoors in Nagoya?
Direct-sow around mid March (Mar 14–Apr 4) in Nagoya, based on its local frost dates. Confidence 84%.
When will swiss chard be ready to harvest in Nagoya?
Expect to harvest from around early May (May 3–May 13) in Nagoya, based on its local frost dates. Confidence 76%.
When should I start swiss chard seeds indoors in Nagoya?
Start seeds indoors around late February (Feb 28–Mar 21) in Nagoya, based on its local frost dates. Confidence 80%.
When can I transplant swiss chard outdoors in Nagoya?
Transplant outdoors around mid March (Mar 14–Apr 4) in Nagoya, based on its local frost dates. Confidence 84%.
How long is the growing season in Nagoya?
Nagoya has roughly 247 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 84/100 · NOAA GHCN-Daily · 1991–2020 normals · frost dates are probabilities, not guarantees.