When to plant eggplant in Billings
Eggplant is frost-tender, so every date keys off Billings's last spring frost of May 8.
Step 1 · Sow
Start seeds indoors
Mar 25 – Apr 15
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
Jun 15 – Jul 6
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
Aug 24 – Sep 8
Picking runs until conditions turn against the crop.
Window
Days to maturity
70 – 85 d
Billings's 150-day season leaves this much room.
Eggplant on Billings'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 8
OCT 4
Common questions
When will eggplant be ready to harvest in Billings?
Expect to harvest from around late August (Aug 24–Sep 8) in Billings, based on its local frost dates. Confidence 81%.
When should I start eggplant seeds indoors in Billings?
Start seeds indoors around late March (Mar 25–Apr 15) in Billings, based on its local frost dates. Confidence 86%.
When can I transplant eggplant outdoors in Billings?
Transplant outdoors around mid June (Jun 15–Jul 6) in Billings, based on its local frost dates. Confidence 87%.
How long is the growing season in Billings?
Billings 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 Billings's frost dates.
Confidence 90/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.