When to plant potato in Sapporo
Potato 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
Jul 18 – Sep 6
Picking runs until conditions turn against the crop.
Window
Days to maturity
70 – 120 d
Sapporo's 166-day season leaves this much room.
Potato 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
HARVEST
MAY 12
OCT 20
Common questions
When can I sow potato outdoors in Sapporo?
Direct-sow around early May (May 9–May 30) in Sapporo, based on its local frost dates. Confidence 44%.
When will potato be ready to harvest in Sapporo?
Expect to harvest from around mid July (Jul 18–Sep 6) 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 enough time to grow potato to maturity outdoors.
The rule of thumb
Sow potato 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.