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When to plant mint in Delaware

Delaware spans USDA zones 7a–7b, so the right time to plant mint 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 mint 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

Mint in Delaware: FAQ

When can I plant mint in Delaware?

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

Does the mint planting date vary across Delaware?

Yes. Delaware publishes 11 cities with their own frost dates, so the right mint 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.

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