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When to plant thyme in Delaware

Delaware spans USDA zones 7a–7b, so the right time to plant thyme shifts by weeks across the state. The window to transplant seedlings outdoors runs from about April 4 in Dover to April 11 in Milford — below are local dates for 11 cities, each computed from its own frost dates.

In Wilmingtonthe thyme transplant out window (April 7–April 21) has passed for this year.
CityZoneLast frostFirst frostTransplant out
Wilmington7bApril 7November 4April 7 – April 21
Dover7bApril 4November 4April 4 – April 18
Newark7bApril 7November 2April 7 – April 21
Middletown7bApril 7November 2April 7 – April 21
Bear7bApril 7November 2April 7 – April 21
Glasgow7bApril 7November 2April 7 – April 21
Brookside7bApril 7November 2April 7 – April 21
Hockessin7aApril 7November 4April 7 – April 21

Thyme in Delaware: FAQ

When can I plant thyme in Delaware?

Across Delaware, the time to transplant thyme spans roughly April 4 in Dover to April 11 in Milford, each following that city's local frost dates.

Does the thyme planting date vary across Delaware?

Yes. Delaware publishes 11 cities with their own frost dates, so the right thyme planting window shifts by weeks between the warmest and coldest parts of the state — use your city's page for the exact dates.

Planting reminders

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An email when it’s time to start seeds, transplant, and sow — timed to your frost dates. Double opt-in, one-click unsubscribe, no spam.

Thyme planting guide →All Delaware cities →Delaware planting calendar →
When to Plant Thyme in Delaware — Frost-Based Dates by City — BlissGarden