When to Plant Rosemary in Zone 3
In USDA zone 3, start seeds indoors around March 21, transplant or plant outdoors June 13 to September 11, and expect your first harvest around September 11.
Rosemary planting calendar for USDA Zone 3
Start seeds indoors
Mar 21
Transplant outdoors
Jun 13
Projected first harvest
Sep 11
Most rosemary mature in about 90 days. Dates use USDA zone 3a average frost dates. Set your ZIP in HomeSown for dates tuned to your exact location.
What zone 3 means for rosemary
Average last spring frost
May 30
Average first fall frost
September 10
Those two dates are what set the schedule above. Zone 3 gives you roughly 103 frost-free days, and rosemary need about 90 days to mature.
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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