When to plant eggplant in Sapporo
Eggplant is frost-tender, so every date keys off Sapporo's last spring frost of May 5.
Step 1 · Sow
Start seeds indoors
Mar 10 – Mar 31
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
May 19 – Jun 9
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
Jul 28 – Aug 12
Picking runs until conditions turn against the crop.
Window
Days to maturity
70 – 85 d
Sapporo's 173-day season leaves this much room.
Eggplant 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 will eggplant be ready to harvest in Sapporo?
Expect to harvest from around late July (Jul 28–Aug 12) in Sapporo, based on its local frost dates. Confidence 76%.
When should I start eggplant seeds indoors in Sapporo?
Start seeds indoors around early March (Mar 10–Mar 31) in Sapporo, based on its local frost dates. Confidence 80%.
When can I transplant eggplant outdoors in Sapporo?
Transplant outdoors around mid May (May 19–Jun 9) in Sapporo, based on its local frost dates. Confidence 84%.
How long is the growing season in Sapporo?
Sapporo has roughly 173 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 Sapporo's frost dates.
Confidence 84/100 · NOAA GHCN-Daily · 1991–2020 normals · frost dates are probabilities, not guarantees.