When to plant garlic in Sapporo
Garlic is cold-hardy, so every date keys off Sapporo's frost dates of May 12.
Step 1 · Sow
Direct sow outdoors
Sep 22 – Oct 13
Sow straight into warm, workable soil.
Step 2 · Harvest
Harvest window
May 20 – May 20
Picking runs until conditions turn against the crop.
Window
Days to maturity
240 d
Sapporo's 166-day season leaves this much room.
Garlic 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 garlic outdoors in Sapporo?
Direct-sow around late September (Sep 22–Oct 13) in Sapporo, based on its local frost dates. Confidence 45%.
When will garlic be ready to harvest in Sapporo?
Expect to harvest from around mid May (May 20–May 20) in Sapporo, based on its local frost dates. Confidence 40%.
How long is the growing season in Sapporo?
Sapporo has roughly 166 frost-free days, which is marginal time to grow garlic to maturity outdoors.
The rule of thumb
Sow garlic 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.