FrostCal

When to Plant Eggplant in Idaho

In a typical Idaho location, start seeds indoors Feb 19 – Mar 5, then transplant outdoors May 14 – May 21. Across the state, the outdoor planting window starts as early as Apr 20 in Lewiston and as late as May 31 in Eagle. 2 cities in Idaho are essentially frost-free and can plant on a year-round schedule.

Method Start indoors, then transplant
Days to maturity 65–85 days

Warm-season crop, similar timing to pepper; needs consistently warm soil (65F+) to transplant.

Eggplant Planting Dates by City

CityStart indoorsTransplant
BoiseFeb 13 – Feb 27May 8 – May 15
MeridianFeb 13 – Feb 27May 8 – May 15
NampaFeb 18 – Mar 4May 13 – May 20
Idaho FallsFeb 28 – Mar 14May 23 – May 30
PocatelloFeb 21 – Mar 7May 16 – May 23
CaldwellFeb 12 – Feb 26May 7 – May 14
Coeur d'AleneFeb 11 – Feb 25May 6 – May 13
Twin FallsFeb 19 – Mar 5May 14 – May 21
LewistonJan 26 – Feb 9Apr 20 – Apr 27
Lewiston OrchardsJan 26 – Feb 9Apr 20 – Apr 27
Post FallsFeb 11 – Feb 25May 6 – May 13
RexburgMar 6 – Mar 20May 29 – Jun 5
MoscowFrost-free: year-round planting
EagleMar 8 – Mar 22May 31 – Jun 7
CondaFrost-free: year-round planting
KunaFeb 13 – Feb 27May 8 – May 15
AmmonFeb 28 – Mar 14May 23 – May 30
ChubbuckFeb 21 – Mar 7May 16 – May 23
HaydenFeb 11 – Feb 25May 6 – May 13
Mountain HomeFeb 21 – Mar 7May 16 – May 23
BlackfootFeb 24 – Mar 10May 19 – May 26
Garden CityFeb 13 – Feb 27May 8 – May 15
JeromeFeb 21 – Mar 7May 16 – May 23
BurleyFeb 26 – Mar 12May 21 – May 28

Showing the 24 most populous of 24 Idaho cities. Dates are estimates from each city's NOAA frost normals and university extension timing guidelines. See all Idaho cities.

Frequently Asked Questions

When should I plant eggplant in Idaho?

In a typical Idaho location, start seeds indoors Feb 19 – Mar 5, then transplant outdoors May 14 – May 21. Across the state, the outdoor planting window starts as early as Apr 20 in Lewiston and as late as May 31 in Eagle. 2 cities in Idaho are essentially frost-free and can plant on a year-round schedule.

When is the last frost in Idaho?

The average last spring frost in Idaho ranges from April 6 in Lewiston to May 17 in Eagle, based on NOAA 1991–2020 climate normals.

How long do eggplant take to grow?

Eggplant typically take 65–85 days from planting to harvest. Warm-season crop, similar timing to pepper; needs consistently warm soil (65F+) to transplant.

Other Crops in Idaho

When to plant eggplant in other states

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