When to plant swiss chard in Fukuoka

Swiss chard is cold-hardy, so every date keys off Fukuoka's frost dates of Apr 4.
Step 1 · Sow
Start seeds indoors
Mar 7 – Mar 28
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
Mar 21 – Apr 11
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
May 10 – May 20
Picking runs until conditions turn against the crop.
Step 4 · Second sowing
Autumn / second sowing
Aug 30 – Sep 13
A second window for a fall crop, timed to mature before the first frost.
Step 5 · Second harvest
Autumn crop harvest
Oct 26 – Nov 5
Maturity window for the second sowing.
Window
Days to maturity
50 – 60 d
Fukuoka's 239-day season leaves this much room.
Swiss chard on Fukuoka'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 4
NOV 30

Common questions

When can I sow swiss chard outdoors in Fukuoka?

Direct-sow around late March (Mar 21–Apr 11) in Fukuoka, based on its local frost dates. Confidence 45%.

When will swiss chard be ready to harvest in Fukuoka?

Expect to harvest from around early May (May 10–May 20) in Fukuoka, based on its local frost dates. Confidence 40%.

When should I start swiss chard seeds indoors in Fukuoka?

Start seeds indoors around early March (Mar 7–Mar 28) in Fukuoka, based on its local frost dates. Confidence 43%.

When can I transplant swiss chard outdoors in Fukuoka?

Transplant outdoors around late March (Mar 21–Apr 11) in Fukuoka, based on its local frost dates. Confidence 45%.

Can I plant swiss chard in autumn in Fukuoka?

Yes — Fukuoka supports a second, autumn sowing of swiss chard around late August (Aug 30–Sep 13), timed to mature before the first fall frost.

How long is the growing season in Fukuoka?

Fukuoka has roughly 239 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 Fukuoka's frost dates.

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