When to Plant Mother of Thyme in Zone 4
In USDA zone 4a, start seeds indoors around March 20, transplant or plant outdoors May 15 to August 13, and expect your first harvest around August 13. (4a shown here — see 4a and 4b dates separately below.)
Mother of Thyme planting calendar for USDA Zone 4a
Average last spring frost
May 15
Average first fall frost
September 20
Start seeds indoors
Mar 20
Transplant outdoors
May 15
Projected first harvest
Aug 13
Mother of Thyme is ready to harvest in about 90 days, needing roughly 128 frost-free days in zone 4a.
Mother of Thyme planting calendar for USDA Zone 4b
Average last spring frost
May 10
Average first fall frost
September 25
Start seeds indoors
Mar 15
Transplant outdoors
May 10
Projected first harvest
Aug 8
Mother of Thyme is ready to harvest in about 90 days, needing roughly 138 frost-free days in zone 4b.
Not sure whether you're in 4a or 4b? Set your ZIP in HomeSown for dates tuned to your exact location.
Varieties to grow
1 variety of mother of thyme in the HomeSown library. Tap any for its full grow guide.
Common problems with mother of thyme
What to watch for, with identification and treatment for each
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