When to Plant Thyme in South Dakota
South Dakota spans USDA hardiness 4a to 5b (zones 4a to 5b on this page). Plant thyme 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
Thyme planting calendar for South Dakota, 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 12
Thyme is ready to harvest in about 75 days. Full zone 4 guide (both 4a and 4b) →
Thyme planting calendar for South Dakota, 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 7
Thyme is ready to harvest in about 75 days. Full zone 4 guide (both 4a and 4b) →
Thyme planting calendar for South Dakota, 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 2
Thyme is ready to harvest in about 75 days. Full zone 5 guide (both 5a and 5b) →
Thyme planting calendar for South Dakota, 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
Jul 28
Thyme is ready to harvest in about 75 days. Full zone 5 guide (both 5a and 5b) →
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 thyme in the HomeSown library. Tap any for its full grow guide.
Common problems with thyme
What to watch for, with identification and treatment for each
🌱 Grow thyme 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 →