When to Plant Rosemary in Maine
Maine spans USDA hardiness 3b to 7a (zones 3b to 7a on this page). Plant rosemary 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 · Zone 7a
Rosemary planting calendar for Maine, Zone 3b
Average last spring frost
May 20
Average first fall frost
September 15
Start seeds indoors
Mar 11
Transplant outdoors
Jun 3
Projected first harvest
Sep 1
Most rosemary mature in about 90 days. Full zone 3 guide (both 3a and 3b) →
Rosemary planting calendar for Maine, Zone 4a
Average last spring frost
May 15
Average first fall frost
September 20
Start seeds indoors
Mar 6
Transplant outdoors
May 29
Projected first harvest
Aug 27
Most rosemary mature in about 90 days. Full zone 4 guide (both 4a and 4b) →
Rosemary planting calendar for Maine, Zone 4b
Average last spring frost
May 10
Average first fall frost
September 25
Start seeds indoors
Mar 1
Transplant outdoors
May 24
Projected first harvest
Aug 22
Most rosemary mature in about 90 days. Full zone 4 guide (both 4a and 4b) →
Rosemary planting calendar for Maine, Zone 5a
Average last spring frost
May 5
Average first fall frost
October 1
Start seeds indoors
Feb 24
Transplant outdoors
May 19
Projected first harvest
Aug 17
Most rosemary mature in about 90 days. Full zone 5 guide (both 5a and 5b) →
Rosemary planting calendar for Maine, Zone 5b
Average last spring frost
April 30
Average first fall frost
October 5
Start seeds indoors
Feb 19
Transplant outdoors
May 14
Projected first harvest
Aug 12
Most rosemary mature in about 90 days. Full zone 5 guide (both 5a and 5b) →
Rosemary planting calendar for Maine, Zone 6a
Average last spring frost
April 25
Average first fall frost
October 10
Start seeds indoors
Feb 14
Transplant outdoors
May 9
Projected first harvest
Aug 7
Most rosemary mature in about 90 days. Full zone 6 guide (both 6a and 6b) →
Rosemary planting calendar for Maine, Zone 6b
Average last spring frost
April 20
Average first fall frost
October 15
Start seeds indoors
Feb 9
Transplant outdoors
May 4
Projected first harvest
Aug 2
Most rosemary mature in about 90 days. Full zone 6 guide (both 6a and 6b) →
Rosemary planting calendar for Maine, Zone 7a
Average last spring frost
April 15
Average first fall frost
October 20
Start seeds indoors
Feb 4
Transplant outdoors
Apr 29
Projected first harvest
Jul 28
Most rosemary mature in about 90 days. 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
2 varieties of rosemary in the HomeSown library. Tap any for its full grow guide.
Common problems with rosemary
What to watch for, with identification and treatment for each
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