When to plant spinach in Fukuoka
Spinach is cold-hardy, so every date keys off Fukuoka's frost dates of Apr 4.
Step 1 · Sow
Direct sow outdoors
Feb 21 – Mar 14
Sow straight into warm, workable soil.
Step 2 · Harvest
Harvest window
Apr 2 – Apr 12
Picking runs until conditions turn against the crop.
Step 3 · Second sowing
Autumn / second sowing
Sep 20 – Oct 4
A second window for a fall crop, timed to mature before the first frost.
Step 4 · Second harvest
Autumn crop harvest
Nov 6 – Nov 16
Maturity window for the second sowing.
Window
Days to maturity
40 – 50 d
Fukuoka's 239-day season leaves this much room.
Spinach 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
FROST
FROST
APR 4
NOV 30
Common questions
When can I sow spinach outdoors in Fukuoka?
Direct-sow around late February (Feb 21–Mar 14) in Fukuoka, based on its local frost dates. Confidence 45%.
When will spinach be ready to harvest in Fukuoka?
Expect to harvest from around early April (Apr 2–Apr 12) in Fukuoka, based on its local frost dates. Confidence 40%.
Can I plant spinach in autumn in Fukuoka?
Yes — Fukuoka supports a second, autumn sowing of spinach around mid September (Sep 20–Oct 4), 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 spinach to maturity outdoors.
The rule of thumb
Sow spinach 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.