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When to plant plum in Delaware

Delaware spans USDA zones 7a–7b, so the right time to plant plum shifts by weeks across the state. The window to transplant seedlings outdoors runs from about March 7 in Dover to March 14 in Milford — below are local dates for 11 cities, each computed from its own frost dates.

In Wilmingtonthe plum transplant out window (March 10–March 24) has passed for this year.
CityZoneLast frostFirst frostTransplant out
Wilmington7bApril 7November 4March 10 – March 24
Dover7bApril 4November 4March 7 – March 21
Newark7bApril 7November 2March 10 – March 24
Middletown7bApril 7November 2March 10 – March 24
Bear7bApril 7November 2March 10 – March 24
Glasgow7bApril 7November 2March 10 – March 24
Brookside7bApril 7November 2March 10 – March 24
Hockessin7aApril 7November 4March 10 – March 24

Plum in Delaware: FAQ

When can I plant plum in Delaware?

Across Delaware, the time to transplant plum spans roughly March 7 in Dover to March 14 in Milford, each following that city's local frost dates.

Does the plum planting date vary across Delaware?

Yes. Delaware publishes 11 cities with their own frost dates, so the right plum 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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Plum planting guide →All Delaware cities →Delaware planting calendar →
When to Plant Plum in Delaware — Frost-Based Dates by City — BlissGarden