When should I plant Thyme in Zone 5b?

Start Thyme seeds indoors around Mar 3. Transplant outdoors after Apr 21. Expect first harvest around Jun 20.

What is the last frost date for Zone 5b?

The average last spring frost date for Zone 5b is Apr 28. The first fall frost averages Oct 8, giving a 163-day growing season.

Can I grow Thyme in Zone 5b?

Yes. Thyme needs 80 days to harvest. Zone 5b has a 163-day growing season, which is sufficient.

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🌿 Growing Thyme in Zone 5b

Zone 5b has cold winters and a moderate growing season. Timing is key for Thyme in this zone. Last frost: Apr 28. First frost: Oct 8.

Planting Calendar

Indoor

Outdoor

Harvest

Mar 3Oct 8

Season: Apr 28 – Oct 8 (163 days)

Zone5b

Last FrostApr 28

First FrostOct 8

Season Length163 days

Days to Harvest80

SunFull Sun

Frost ToleranceModerate

Spacing4/sqft (6" apart)

When to Plant Thyme in Zone 5b

Start Seeds Indoors: Mar 3

Start Thyme seeds indoors around Mar 3 (8 weeks before last frost). Optimal germination temperature: 70°F. Germinates in 14–21 days.

Transplant Outdoors: Apr 21

Transplant Thyme seedlings outdoors after Apr 21. Wait until soil temperature reaches 50°F. Space plants at 4/sqft (6" apart). Harden off plants for a week before moving outside.

Harvest: Jun 20

First harvest approximately Jun 20 (~60 days from transplant). Continue harvesting until first frost (Oct 8). Thyme can overwinter in mild climates for continued harvest.

Companion Planting

✅ Cabbage ✅ Eggplant✅ Strawberries✅ Tomatoes✅ Potatoes

Thyme in Other Zones

1a 1b 2a 2b 3a 3b 4a 4b 5a 5b 6a 6b 7a 7b 8a 8b 9a 9b 10a 10b 11a 11b 12a 12b 13a 13b

Plan Your Thyme Garden

Track Thyme from seed to harvest with personalized frost dates, watering recommendations, and companion planting visualization.

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