When to plant cilantro / coriander in Sapporo
Cilantro / Coriander is cold-hardy, so every date keys off Sapporo's frost dates of May 12.
Step 1 · Sow
Direct sow outdoors
May 9 – May 30
Sow straight into warm, workable soil.
Step 2 · Harvest
Harvest window
Jun 23 – Jul 18
Picking runs until conditions turn against the crop.
Step 3 · Second sowing
Autumn / second sowing
Jul 15 – Jul 29
A second window for a fall crop, timed to mature before the first frost.
Step 4 · Second harvest
Autumn crop harvest
Sep 5 – Sep 30
Maturity window for the second sowing.
Window
Days to maturity
45 – 70 d
Sapporo's 166-day season leaves this much room.
Cilantro / Coriander on Sapporo'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
MAY 12
OCT 20
Common questions
When can I sow cilantro / coriander outdoors in Sapporo?
Direct-sow around early May (May 9–May 30) in Sapporo, based on its local frost dates. Confidence 44%.
When will cilantro / coriander be ready to harvest in Sapporo?
Expect to harvest from around late June (Jun 23–Jul 18) in Sapporo, based on its local frost dates. Confidence 40%.
Can I plant cilantro / coriander in autumn in Sapporo?
Yes — Sapporo supports a second, autumn sowing of cilantro / coriander around mid July (Jul 15–Jul 29), timed to mature before the first fall frost.
How long is the growing season in Sapporo?
Sapporo has roughly 166 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 Sapporo's frost dates.
Confidence 45/100 · Curated · based on NASA POWER (modeled) 1991–2020 · frost dates are probabilities, not guarantees.