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Can You Grow Watercress in Pennsylvania?

US · USDA Zone 6a · zones 5a, 5b, 6a, 6b

Grows well here

Watercress grows well here if you keep its roots constantly wet — ideal for a shade container garden.

Plant zones

2a–9b

Pennsylvania last frost

early April

Pennsylvania first frost

late October

Days to harvest

30–60 days

When to plant Watercresses in Pennsylvania

Direct sow

Apr 1

Harvest

May 1 – May 31

Dates are approximate, based on Pennsylvania's average frost dates. Your exact yard may vary by microclimate.

About Watercress

Watercress is a peppery, nutrient-dense aquatic green that loves cool, running water and partial shade — an easy container crop if you keep it constantly wet.

Grow in a container of rich soil kept standing in water, refreshed regularly. Harvest outer leaves often. Prefers cool shade to hot sun.

Full watercress growing guide →

Gardening in Pennsylvania

Pennsylvania has a humid continental climate. Philadelphia is Zone 7a; Pittsburgh is Zone 6a; northern Pennsylvania is Zone 5a-5b. Four distinct seasons with a 6-7 month growing window.