When to plant potato in Tokyo
Potato is cold-hardy, so every date keys off Tokyo's frost dates of Mar 28.
Step 1 · Sow
Direct sow outdoors
Mar 14 – Apr 4
Sow straight into warm, workable soil.
Step 2 · Harvest
Harvest window
May 23 – Jul 12
Picking runs until conditions turn against the crop.
Window
Days to maturity
70 – 120 d
Tokyo's 258-day season leaves this much room.
Potato on Tokyo'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
HARVEST
MAR 28
DEC 11
Common questions
When can I sow potato outdoors in Tokyo?
Direct-sow around mid March (Mar 14–Apr 4) in Tokyo, based on its local frost dates. Confidence 45%.
When will potato be ready to harvest in Tokyo?
Expect to harvest from around late May (May 23–Jul 12) in Tokyo, based on its local frost dates. Confidence 40%.
How long is the growing season in Tokyo?
Tokyo has roughly 258 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 Tokyo's frost dates.
Confidence 45/100 · Curated · based on NASA POWER (modeled) 1991–2020 · frost dates are probabilities, not guarantees.