When to Plant Napa Cabbage in Montana
Montana spans USDA hardiness 3b to 6b (zones 3b to 6b on this page). Plant napa cabbage by your local frost date, not the calendar — pick your zone below for exact start-indoors, transplant, and harvest dates.
Jump to: Zone 3b · Zone 4a · Zone 4b · Zone 5a · Zone 5b · Zone 6a · Zone 6b
Napa Cabbage planting calendar for Montana, Zone 3b
Average last spring frost
May 20
Average first fall frost
September 15
spring planting
Start seeds indoors
Apr 1
Transplant outdoors
May 6
Projected first harvest
Jul 20
fall planting
Start seeds indoors
Jun 2
Transplant outdoors
Jul 7
Projected first harvest
Sep 20
spring planting
fall planting
Napa Cabbage is ready to harvest in about 75 days. Full zone 3 guide (both 3a and 3b) →
Napa Cabbage planting calendar for Montana, Zone 4a
Average last spring frost
May 15
Average first fall frost
September 20
spring planting
Start seeds indoors
Mar 27
Transplant outdoors
May 1
Projected first harvest
Jul 15
fall planting
Start seeds indoors
Jun 7
Transplant outdoors
Jul 12
Projected first harvest
Sep 25
spring planting
fall planting
Napa Cabbage is ready to harvest in about 75 days. Full zone 4 guide (both 4a and 4b) →
Napa Cabbage planting calendar for Montana, Zone 4b
Average last spring frost
May 10
Average first fall frost
September 25
spring planting
Start seeds indoors
Mar 22
Transplant outdoors
Apr 26
Projected first harvest
Jul 10
fall planting
Start seeds indoors
Jun 12
Transplant outdoors
Jul 17
Projected first harvest
Sep 30
spring planting
fall planting
Napa Cabbage is ready to harvest in about 75 days. Full zone 4 guide (both 4a and 4b) →
Napa Cabbage planting calendar for Montana, Zone 5a
Average last spring frost
May 5
Average first fall frost
October 1
spring planting
Start seeds indoors
Mar 17
Transplant outdoors
Apr 21
Projected first harvest
Jul 5
fall planting
Start seeds indoors
Jun 18
Transplant outdoors
Jul 23
Projected first harvest
Oct 6
spring planting
fall planting
Napa Cabbage is ready to harvest in about 75 days. Full zone 5 guide (both 5a and 5b) →
Napa Cabbage planting calendar for Montana, Zone 5b
Average last spring frost
April 30
Average first fall frost
October 5
spring planting
Start seeds indoors
Mar 12
Transplant outdoors
Apr 16
Projected first harvest
Jun 30
fall planting
Start seeds indoors
Jun 22
Transplant outdoors
Jul 27
Projected first harvest
Oct 10
spring planting
fall planting
Napa Cabbage is ready to harvest in about 75 days. Full zone 5 guide (both 5a and 5b) →
Napa Cabbage planting calendar for Montana, Zone 6a
Average last spring frost
April 25
Average first fall frost
October 10
spring planting
Start seeds indoors
Mar 7
Transplant outdoors
Apr 11
Projected first harvest
Jun 25
fall planting
Start seeds indoors
Jun 27
Transplant outdoors
Aug 1
Projected first harvest
Oct 15
spring planting
fall planting
Napa Cabbage is ready to harvest in about 75 days. Full zone 6 guide (both 6a and 6b) →
Napa Cabbage planting calendar for Montana, Zone 6b
Average last spring frost
April 20
Average first fall frost
October 15
spring planting
Start seeds indoors
Mar 2
Transplant outdoors
Apr 6
Projected first harvest
Jun 20
fall planting
Start seeds indoors
Jul 2
Transplant outdoors
Aug 6
Projected first harvest
Oct 20
spring planting
fall planting
Napa Cabbage is ready to harvest in about 75 days. Full zone 6 guide (both 6a and 6b) →
Not sure which half-zone you're in? Set your ZIP in HomeSown for dates tuned to your exact location.
Varieties to grow
1 variety of napa cabbage in the HomeSown library. Tap any for its full grow guide.
Common problems with napa cabbage
What to watch for, with identification and treatment for each
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