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When to plant watercress in Delaware

Delaware spans USDA zones 7a–7b, so the right time to plant watercress shifts by weeks across the state. The window to sow seed directly outdoors runs from about March 21 in Dover to March 28 in Milford below are local dates for 11 cities, each computed from its own frost dates.

In Wilmingtonthe watercress direct sow window (March 24April 21) has passed for this year.
CityZoneLast frostFirst frostDirect sow
Wilmington7bApril 7November 4March 24 – April 21
Dover7bApril 4November 4March 21 – April 18
Newark7bApril 7November 2March 24 – April 21
Middletown7bApril 7November 2March 24 – April 21
Bear7bApril 7November 2March 24 – April 21
Glasgow7bApril 7November 2March 24 – April 21
Brookside7bApril 7November 2March 24 – April 21
Hockessin7aApril 7November 4March 24 – April 21

Watercress in Delaware: FAQ

When can I plant watercress in Delaware?

Across Delaware, the time to direct-sow watercress spans roughly March 21 in Dover to March 28 in Milford, each following that city's local frost dates.

Does the watercress planting date vary across Delaware?

Yes. Delaware publishes 11 cities with their own frost dates, so the right watercress 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 watercress take to grow in Delaware?

Watercress takes about 45–60 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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Watercress planting guide →All Delaware cities →Delaware planting calendar →
When to Plant Watercress in Delaware — Frost-Based Dates by City — BlissGarden