When to plant cilantro / coriander in Tokyo
Cilantro / Coriander is cold-hardy, so every date keys off Tokyo's frost dates of Mar 28.
Step 1 · Sow
Direct sow outdoors
Mar 14 – Apr 4
Sow straight into warm, workable soil.
Step 2 · Harvest
Harvest window
Apr 28 – May 23
Picking runs until conditions turn against the crop.
Step 3 · Second sowing
Autumn / second sowing
Sep 3 – Sep 17
A second window for a fall crop, timed to mature before the first frost.
Step 4 · Second harvest
Autumn crop harvest
Oct 25 – Nov 19
Maturity window for the second sowing.
Window
Days to maturity
45 – 70 d
Tokyo's 258-day season leaves this much room.
Cilantro / Coriander 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 cilantro / coriander outdoors in Tokyo?
Direct-sow around mid March (Mar 14–Apr 4) in Tokyo, based on its local frost dates. Confidence 45%.
When will cilantro / coriander be ready to harvest in Tokyo?
Expect to harvest from around late April (Apr 28–May 23) in Tokyo, based on its local frost dates. Confidence 40%.
Can I plant cilantro / coriander in autumn in Tokyo?
Yes — Tokyo supports a second, autumn sowing of cilantro / coriander around early September (Sep 3–Sep 17), 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 cilantro / coriander to maturity outdoors.
The rule of thumb
Sow cilantro / coriander 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.