FrostCal

When to Plant Arugula in Idaho

In a typical Idaho location, sow outdoors Apr 2 – Apr 16. Across the state, the outdoor planting window starts as early as Mar 9 in Lewiston and as late as Apr 19 in Eagle. For a fall crop, plant around Sep 2 – Sep 9. 2 cities in Idaho are essentially frost-free and can plant on a year-round schedule.

Method Direct sow
Days to maturity 30–40 days

Fast-growing, cold-tolerant green; direct sow 2-4 weeks before last frost, succession sow every 2-3 weeks.

Arugula Planting Dates by City

CityDirect sowFall planting
BoiseMar 27 – Apr 10Sep 9 – Sep 16
MeridianMar 27 – Apr 10Sep 9 – Sep 16
NampaApr 1 – Apr 15Sep 1 – Sep 8
Idaho FallsApr 11 – Apr 25Aug 20 – Aug 27
PocatelloApr 4 – Apr 18Aug 30 – Sep 6
CaldwellMar 26 – Apr 9Sep 6 – Sep 13
Coeur d'AleneMar 25 – Apr 8Sep 6 – Sep 13
Twin FallsApr 2 – Apr 16Aug 28 – Sep 4
LewistonMar 9 – Mar 23Sep 14 – Sep 21
Lewiston OrchardsMar 9 – Mar 23Sep 14 – Sep 21
Post FallsMar 25 – Apr 8Sep 6 – Sep 13
RexburgApr 17 – May 1Aug 12 – Aug 19
MoscowFrost-free: year-round planting
EagleApr 19 – May 3Aug 31 – Sep 7
CondaFrost-free: year-round planting
KunaMar 27 – Apr 10Sep 9 – Sep 16
AmmonApr 11 – Apr 25Aug 20 – Aug 27
ChubbuckApr 4 – Apr 18Aug 30 – Sep 6
HaydenMar 25 – Apr 8Sep 6 – Sep 13
Mountain HomeApr 4 – Apr 18Aug 27 – Sep 3
BlackfootApr 7 – Apr 21Aug 22 – Aug 29
Garden CityMar 27 – Apr 10Sep 9 – Sep 16
JeromeApr 4 – Apr 18Sep 2 – Sep 9
BurleyApr 9 – Apr 23Aug 23 – Aug 30

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 arugula in Idaho?

In a typical Idaho location, sow outdoors Apr 2 – Apr 16. Across the state, the outdoor planting window starts as early as Mar 9 in Lewiston and as late as Apr 19 in Eagle. For a fall crop, plant around Sep 2 – Sep 9. 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 arugula take to grow?

Arugula typically take 30–40 days from planting to harvest. Fast-growing, cold-tolerant green; direct sow 2-4 weeks before last frost, succession sow every 2-3 weeks.

Other Crops in Idaho

When to plant arugula in other states

Related Guides