When to Plant Kale in Idaho
Idaho spans USDA hardiness 4a to 7b (zones 4a to 7b on this page). Plant kale by your local frost date, not the calendar — pick your zone below for exact start-indoors, transplant, and harvest dates.
Jump to: Zone 4a · Zone 4b · Zone 5a · Zone 5b · Zone 6a · Zone 6b · Zone 7a · Zone 7b
Kale planting calendar for Idaho, Zone 4a
Average last spring frost
May 15
Average first fall frost
September 20
spring planting
Start seeds indoors
Mar 13
Transplant outdoors
Apr 17
Projected first harvest
Jun 11
fall planting
Start seeds indoors
Jun 28
Transplant outdoors
Aug 2
Projected first harvest
Sep 26
spring planting
fall planting
Most kale mature in about 55 to 60 days depending on the variety. Full zone 4 guide (both 4a and 4b) →
Kale planting calendar for Idaho, Zone 4b
Average last spring frost
May 10
Average first fall frost
September 25
spring planting
Start seeds indoors
Mar 8
Transplant outdoors
Apr 12
Projected first harvest
Jun 6
fall planting
Start seeds indoors
Jul 3
Transplant outdoors
Aug 7
Projected first harvest
Oct 1
spring planting
fall planting
Most kale mature in about 55 to 60 days depending on the variety. Full zone 4 guide (both 4a and 4b) →
Kale planting calendar for Idaho, Zone 5a
Average last spring frost
May 5
Average first fall frost
October 1
spring planting
Start seeds indoors
Mar 3
Transplant outdoors
Apr 7
Projected first harvest
Jun 1
fall planting
Start seeds indoors
Jul 9
Transplant outdoors
Aug 13
Projected first harvest
Oct 7
spring planting
fall planting
Most kale mature in about 55 to 60 days depending on the variety. Full zone 5 guide (both 5a and 5b) →
Kale planting calendar for Idaho, Zone 5b
Average last spring frost
April 30
Average first fall frost
October 5
spring planting
Start seeds indoors
Feb 26
Transplant outdoors
Apr 2
Projected first harvest
May 27
fall planting
Start seeds indoors
Jul 13
Transplant outdoors
Aug 17
Projected first harvest
Oct 11
spring planting
fall planting
Most kale mature in about 55 to 60 days depending on the variety. Full zone 5 guide (both 5a and 5b) →
Kale planting calendar for Idaho, Zone 6a
Average last spring frost
April 25
Average first fall frost
October 10
spring planting
Start seeds indoors
Feb 21
Transplant outdoors
Mar 28
Projected first harvest
May 22
fall planting
Start seeds indoors
Jul 18
Transplant outdoors
Aug 22
Projected first harvest
Oct 16
spring planting
fall planting
Most kale mature in about 55 to 60 days depending on the variety. Full zone 6 guide (both 6a and 6b) →
Kale planting calendar for Idaho, Zone 6b
Average last spring frost
April 20
Average first fall frost
October 15
spring planting
Start seeds indoors
Feb 16
Transplant outdoors
Mar 23
Projected first harvest
May 17
fall planting
Start seeds indoors
Jul 23
Transplant outdoors
Aug 27
Projected first harvest
Oct 21
spring planting
fall planting
Most kale mature in about 55 to 60 days depending on the variety. Full zone 6 guide (both 6a and 6b) →
Kale planting calendar for Idaho, Zone 7a
Average last spring frost
April 15
Average first fall frost
October 20
spring planting
Start seeds indoors
Feb 11
Transplant outdoors
Mar 18
Projected first harvest
May 12
fall planting
Start seeds indoors
Jul 28
Transplant outdoors
Sep 1
Projected first harvest
Oct 26
spring planting
fall planting
Most kale mature in about 55 to 60 days depending on the variety. Full zone 7 guide (both 7a and 7b) →
Kale planting calendar for Idaho, Zone 7b
Average last spring frost
April 10
Average first fall frost
October 30
spring planting
Start seeds indoors
Feb 6
Transplant outdoors
Mar 13
Projected first harvest
May 7
fall planting
Start seeds indoors
Aug 7
Transplant outdoors
Sep 11
Projected first harvest
Nov 5
spring planting
fall planting
Most kale mature in about 55 to 60 days depending on the variety. Full zone 7 guide (both 7a and 7b) →
Not sure which half-zone you're in? Set your ZIP in HomeSown for dates tuned to your exact location.
Varieties to grow
3 varieties of kale in the HomeSown library. Tap any for its full grow guide.
Common problems with kale
What to watch for, with identification and treatment for each
🌱 Grow kale with a calendar built for your exact yard
HomeSown turns your ZIP code into a personalized planting calendar, watering reminders, and pest help. Free to start.
Start your free garden →