When to Plant Thyme in Minnesota
Start Seeds Indoors
Sunday, March 15, 2026
Transplant outdoors: Sunday, May 24, 2026
State
Minnesota
USDA Zones
3a, 3b, 4a, 4b, 5a
Avg Last Frost
Sunday, May 10, 2026
Cities Covered
805
Minnesota Planting Schedule by Zone
Minnesota spans 5 zones — find yours below for the most accurate dates.
| Zone | Last Frost | Start Indoors | Transplant |
|---|---|---|---|
| 3a | Monday, May 25, 2026 | Monday, March 30, 2026 | Monday, June 8, 2026 |
| 3b | Wednesday, May 20, 2026 | Wednesday, March 25, 2026 | Wednesday, June 3, 2026 |
| 4a | Friday, May 15, 2026 | Friday, March 20, 2026 | Friday, May 29, 2026 |
| 4b | Tuesday, May 5, 2026 | Tuesday, March 10, 2026 | Tuesday, May 19, 2026 |
| 5a | Sunday, May 10, 2026 | Sunday, March 15, 2026 | Sunday, May 24, 2026 |
Dates based on average last frost. Check your local forecast before planting.
🌿 About Thyme
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Growing Thyme in Minnesota: Complete Guide
Thyme (Thymus vulgaris) is a warm-season crop that needs a head start indoors before Minnesota's last frost. Most Minnesota gardeners begin seeds indoors around Sunday, March 15, 2026 and move transplants outside around Sunday, May 24, 2026, after the risk of frost has passed.
Because Minnesota stretches across 5 USDA hardiness zones (3a, 3b, 4a, 4b, 5a), planting windows can shift by as much as six to eight weeks from one end of the state to the other. Gardeners in the warmer southern zones can start earlier, while those in cooler northern zones should wait until the zone table above shows their last frost has passed.
With 90 days to maturity, Thyme needs the indoor head start that Minnesota's growing season requires. Starting indoors ensures you have strong transplants ready the moment outdoor conditions are right.
Thyme requires full sun (6+ hours) and low (drought tolerant) moisture. Most of Minnesota receives adequate sunlight during the growing season, though gardeners in humid eastern regions should watch for fungal issues and ensure good air circulation.
For the most precise planting dates tailored to your exact location, enter your ZIP code on our planting calendar or use the zone table above to find the schedule for your area of Minnesota.
Frequently Asked Questions
When should I plant Thyme in Minnesota?
In Minnesota, start Thyme seeds indoors around Sunday, March 15, 2026 and transplant outdoors around Sunday, May 24, 2026 after your last frost. Minnesota spans zones 3a–5a, so dates shift by 1–4 weeks depending on where you live.
What is the last frost date in Minnesota?
Minnesota spans 5 USDA zones (3a, 3b, 4a, 4b, 5a), so last frost dates vary by region. Embarrass, Soudan, Tower (3a) sees frost until around Monday, May 25, 2026, while Minneapolis, Afton, Bayport (5a) is frost-free much earlier.
How long does Thyme take to grow in Minnesota?
Thyme takes about 90 days from transplant (or direct sow) to harvest. Starting seeds indoors in Minnesota gives you a head start so plants are ready to go out after the last frost.
What USDA zones does Minnesota cover for Thyme?
Minnesota includes zones 3a, 3b, 4a, 4b, 5a. Thyme grows well across all of these zones with adjusted timing — use the zone table above to find the right dates for your part of the state.
Find Precise Dates for Your City
Select a city for exact planting dates based on local frost records.