When to plant eggplant in Duluth
Eggplant is frost-tender, so every date keys off Duluth's last spring frost of May 10.
Step 1 · Sow
Start seeds indoors
Mar 27 – Apr 17
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
Jul 14 – Aug 4
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
Sep 22 – Oct 7
Picking runs until conditions turn against the crop.
Window
Days to maturity
70 – 85 d
Duluth's 150-day season leaves this much room.
Eggplant on Duluth'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 10
OCT 7
Common questions
When will eggplant be ready to harvest in Duluth?
Expect to harvest from around late September (Sep 22–Oct 7) in Duluth, based on its local frost dates. Confidence 78%.
When should I start eggplant seeds indoors in Duluth?
Start seeds indoors around late March (Mar 27–Apr 17) in Duluth, based on its local frost dates. Confidence 83%.
When can I transplant eggplant outdoors in Duluth?
Transplant outdoors around mid July (Jul 14–Aug 4) in Duluth, based on its local frost dates. Confidence 84%.
How long is the growing season in Duluth?
Duluth has roughly 150 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 Duluth's frost dates.
Confidence 87/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.