When to plant tomato in Tokyo
Tomato is frost-tender, so every date keys off Tokyo's last spring frost of Mar 28.
Step 1 · Sow
Start seeds indoors
Feb 26 – Mar 19
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
May 11 – Jun 1
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
Jul 10 – Aug 4
Picking runs until conditions turn against the crop.
Window
Days to maturity
60 – 85 d
Tokyo's 258-day season leaves this much room.
Tomato 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
MAR 28
DEC 11
Common questions
When will tomato be ready to harvest in Tokyo?
Expect to harvest from around early July (Jul 10–Aug 4) in Tokyo, based on its local frost dates. Confidence 40%.
When should I start tomato seeds indoors in Tokyo?
Start seeds indoors around late February (Feb 26–Mar 19) in Tokyo, based on its local frost dates. Confidence 43%.
When can I transplant tomato outdoors in Tokyo?
Transplant outdoors around mid May (May 11–Jun 1) in Tokyo, based on its local frost dates. Confidence 44%.
How long is the growing season in Tokyo?
Tokyo has roughly 258 frost-free days, which is enough time to grow tomato to maturity outdoors.
The rule of thumb
Sow tomato 6–8 weeks before your last spring frost; plant out 2–3 weeks after it. 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.