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When to plant mustard greens in Delaware

Delaware spans USDA zones 7a–7b, so the right time to plant mustard greens shifts by weeks across the state. The window to sow seed directly 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 mustard greens direct sow window (March 10–April 21) has passed for this year.
CityZoneLast frostFirst frostDirect sow
Wilmington7bApril 7November 4March 10 – April 21
Dover7bApril 4November 4March 7 – April 18
Newark7bApril 7November 2March 10 – April 21
Middletown7bApril 7November 2March 10 – April 21
Bear7bApril 7November 2March 10 – April 21
Glasgow7bApril 7November 2March 10 – April 21
Brookside7bApril 7November 2March 10 – April 21
Hockessin7aApril 7November 4March 10 – April 21

Mustard Greens in Delaware: FAQ

When can I plant mustard greens in Delaware?

Across Delaware, the time to direct-sow mustard greens spans roughly March 7 in Dover to March 14 in Milford, each following that city's local frost dates.

Does the mustard greens planting date vary across Delaware?

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

How long does mustard greens take to grow in Delaware?

Mustard Greens takes about 30–45 days to reach harvest once planted — check that this fits inside your city's frost-free season on its place page.

Planting reminders

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