When to Plant Thyme in Indiana
Start Seeds Indoors
Monday, February 23, 2026
Transplant outdoors: Monday, May 4, 2026
State
Indiana
USDA Zones
5b, 6a, 6b, 7a
Avg Last Frost
Monday, April 20, 2026
Cities Covered
730
Indiana Planting Schedule by Zone
Indiana spans 4 zones — find yours below for the most accurate dates.
| Zone | Last Frost | Start Indoors | Transplant |
|---|---|---|---|
| 5b | Saturday, April 25, 2026 | Saturday, February 28, 2026 | Saturday, May 9, 2026 |
| 6a | Monday, April 20, 2026 | Monday, February 23, 2026 | Monday, May 4, 2026 |
| 6b | Wednesday, April 15, 2026 | Wednesday, February 18, 2026 | Wednesday, April 29, 2026 |
| 7a | Friday, April 10, 2026 | Friday, February 13, 2026 | Friday, April 24, 2026 |
Dates based on average last frost. Check your local forecast before planting.
🌿 About Thyme
🤝 Companion Plants for Thyme
Good Companions
Growing Thyme in Indiana: Complete Guide
Thyme (Thymus vulgaris) is a warm-season crop that needs a head start indoors before Indiana's last frost. Most Indiana gardeners begin seeds indoors around Monday, February 23, 2026 and move transplants outside around Monday, May 4, 2026, after the risk of frost has passed.
Because Indiana stretches across 4 USDA hardiness zones (5b, 6a, 6b, 7a), planting windows can shift by as much as two to four 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 Indiana'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 Indiana 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 Indiana.
Frequently Asked Questions
When should I plant Thyme in Indiana?
In Indiana, start Thyme seeds indoors around Monday, February 23, 2026 and transplant outdoors around Monday, May 4, 2026 after your last frost. Indiana spans zones 5b–7a, so dates shift by 1–4 weeks depending on where you live.
What is the last frost date in Indiana?
Indiana spans 4 USDA zones (5b, 6a, 6b, 7a), so last frost dates vary by region. Mays, Indianapolis, Boone Grove (5b) sees frost until around Saturday, April 25, 2026, while Bethlehem, Central, Charlestown (7a) is frost-free much earlier.
How long does Thyme take to grow in Indiana?
Thyme takes about 90 days from transplant (or direct sow) to harvest. Starting seeds indoors in Indiana gives you a head start so plants are ready to go out after the last frost.
What USDA zones does Indiana cover for Thyme?
Indiana includes zones 5b, 6a, 6b, 7a. 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.