When to plant cilantro / coriander in Osaka
Cilantro / Coriander is cold-hardy, so every date keys off Osaka's frost dates of Apr 10.
Step 1 · Sow
Direct sow outdoors
Mar 27 – Apr 17
Sow straight into warm, workable soil.
Step 2 · Harvest
Harvest window
May 11 – Jun 5
Picking runs until conditions turn against the crop.
Step 3 · Second sowing
Autumn / second sowing
Aug 16 – Aug 30
A second window for a fall crop, timed to mature before the first frost.
Step 4 · Second harvest
Autumn crop harvest
Oct 7 – Nov 1
Maturity window for the second sowing.
Window
Days to maturity
45 – 70 d
Osaka's 228-day season leaves this much room.
Cilantro / Coriander on Osaka'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 10
NOV 22
Common questions
When can I sow cilantro / coriander outdoors in Osaka?
Direct-sow around late March (Mar 27–Apr 17) in Osaka, based on its local frost dates. Confidence 45%.
When will cilantro / coriander be ready to harvest in Osaka?
Expect to harvest from around mid May (May 11–Jun 5) in Osaka, based on its local frost dates. Confidence 40%.
Can I plant cilantro / coriander in autumn in Osaka?
Yes — Osaka supports a second, autumn sowing of cilantro / coriander around mid August (Aug 16–Aug 30), timed to mature before the first fall frost.
How long is the growing season in Osaka?
Osaka has roughly 228 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 Osaka's frost dates.
Confidence 45/100 · Curated · based on NASA POWER (modeled) 1991–2020 · frost dates are probabilities, not guarantees.