When to plant eggplant in Tokyo
Eggplant is frost-tender, so every date keys off Tokyo's last spring frost of Mar 25.
Step 1 · Sow
Start seeds indoors
Jan 28 – Feb 18
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
Apr 8 – Apr 29
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
Jun 17 – Jul 2
Picking runs until conditions turn against the crop.
Window
Days to maturity
70 – 85 d
Tokyo's 255-day season leaves this much room.
Eggplant 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 25
DEC 5
Common questions
When will eggplant be ready to harvest in Tokyo?
Expect to harvest from around mid June (Jun 17–Jul 2) in Tokyo, based on its local frost dates. Confidence 79%.
When should I start eggplant seeds indoors in Tokyo?
Start seeds indoors around late January (Jan 28–Feb 18) in Tokyo, based on its local frost dates. Confidence 84%.
When can I transplant eggplant outdoors in Tokyo?
Transplant outdoors around early April (Apr 8–Apr 29) in Tokyo, based on its local frost dates. Confidence 88%.
How long is the growing season in Tokyo?
Tokyo has roughly 255 frost-free days, which is enough time to grow eggplant to maturity outdoors.
The rule of thumb
Sow eggplant 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 88/100 · NOAA GHCN-Daily · 1991–2020 normals · frost dates are probabilities, not guarantees.