When to plant spinach in Tokyo
Spinach is cold-hardy, so every date keys off Tokyo's frost dates of Mar 28.
Step 1 · Sow
Direct sow outdoors
Feb 14 – Mar 7
Sow straight into warm, workable soil.
Step 2 · Harvest
Harvest window
Mar 26 – Apr 5
Picking runs until conditions turn against the crop.
Step 3 · Second sowing
Autumn / second sowing
Oct 1 – Oct 15
A second window for a fall crop, timed to mature before the first frost.
Step 4 · Second harvest
Autumn crop harvest
Nov 17 – Nov 27
Maturity window for the second sowing.
Window
Days to maturity
40 – 50 d
Tokyo's 258-day season leaves this much room.
Spinach on Tokyo'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
MAR 28
DEC 11
Common questions
When can I sow spinach outdoors in Tokyo?
Direct-sow around mid February (Feb 14–Mar 7) in Tokyo, based on its local frost dates. Confidence 45%.
When will spinach be ready to harvest in Tokyo?
Expect to harvest from around late March (Mar 26–Apr 5) in Tokyo, based on its local frost dates. Confidence 40%.
Can I plant spinach in autumn in Tokyo?
Yes — Tokyo supports a second, autumn sowing of spinach around early October (Oct 1–Oct 15), timed to mature before the first fall frost.
How long is the growing season in Tokyo?
Tokyo has roughly 258 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 Tokyo's frost dates.
Confidence 45/100 · Curated · based on NASA POWER (modeled) 1991–2020 · frost dates are probabilities, not guarantees.