When to plant garlic in Sapporo
Garlic is cold-hardy, so every date keys off Sapporo's frost dates of May 5.
Step 1 · Sow
Direct sow outdoors
Sep 27 – Oct 18
Sow straight into warm, workable soil.
Step 2 · Harvest
Harvest window
May 24 – May 24
Picking runs until conditions turn against the crop.
Window
Days to maturity
240 d
Sapporo's 173-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 5
OCT 25
Common questions
When can I sow garlic outdoors in Sapporo?
Direct-sow around late September (Sep 27–Oct 18) in Sapporo, based on its local frost dates. Confidence 84%.
When will garlic be ready to harvest in Sapporo?
Expect to harvest from around late May (May 24–May 24) in Sapporo, based on its local frost dates. Confidence 76%.
How long is the growing season in Sapporo?
Sapporo has roughly 173 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 84/100 · NOAA GHCN-Daily · 1991–2020 normals · frost dates are probabilities, not guarantees.