Watercress Seeds | 200 Seeds

How to Grow Watercress Seeds (Nasturtium officinale):
Watercress is a cool-season, moisture-loving leafy green that grows best in consistently wet conditions. You can start seeds indoors 4–6 weeks before last frost or direct sow outdoors in early spring and again in fall. Sow seeds on the soil surface or cover very lightly (about 2–3 mm / ⅛ in) because they need light to germinate. Keep the planting area constantly moist—watercress won’t sprout well if it dries out. Germination is usually 5–15 days in cool temperatures. For easy success, grow it in a container or tray that can sit in a shallow saucer of water, or plant at the edge of a pond/stream. Choose full sun in cool climates; in warm areas, give morning sun with afternoon shade. Space seedlings about 10–15 cm (4–6 in) apart.

How to Care for Watercress:
The key is continuous moisture. Keep soil wet at all times; many growers maintain 1–3 cm (½–1 in) of water in the tray/saucer or keep the bed constantly irrigated. If watercress dries out even briefly, it can bolt or turn bitter. Feed lightly with compost tea or a mild balanced fertilizer every 2–3 weeks, especially in containers, because frequent watering leaches nutrients. Harvest by snipping young tips and outer stems once plants are 10–15 cm tall; regular cutting keeps it bushy and delays flowering. In hot weather it may bolt—shade, cool water, and frequent harvest help. Pests are usually minor, but watch for aphids and flea beetles; rinse with water or use gentle soap sprays. For best flavor and tenderness, grow and harvest in cool weather, then resow every few weeks for a steady supply.

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