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How to Grow Watercress & Upland Cress
How to grow cress from seed: wrinkled crinkled cress, upland cress and watercress, with sowing methods, harvest stages, moisture needs and packet sizes.
Covers wrinkled crinkled cress, upland cress and watercress. DIRECT SEEDING: Wrinkled crinkled cress: from early spring to early fall outdoors, or indoors in a flat any time of year, sow shallowly in a band 2–4" wide at about 20 seeds per inch. Start cutting in 7–10 days when it's 2" tall, and sow every 2 weeks for a steady supply. Upland cress: for full rosettes, sow outdoors from mid-spring on, about 15 seeds per foot, 1/4" deep. Germination is slow, so keep the soil moist. Thin to 4–6" apart and cut rosettes below the basal plate. For baby leaf, sow 3–5 seeds per inch in rows 2" or more apart and cut above the basal plate once leaves reach the size you want. Watercress: it needs so much moisture that direct sowing is tricky. Sow about ½" apart and ¼" deep, thin to 4", and water generously; or start seed indoors in constantly moist mix. Move plants to large pots, a cold frame or a field bed with fertile, humus-rich, well-limed soil near pH 7.0. Keep the soil wet, or stand pots in trays of water and change the water daily.
SEED SPECS:
Average seeds per oz.: wrinkled crinkled cress 11,600; upland cress 22,800; watercress 133,700.
PACKET:
Packets: wrinkled crinkled cress, 250 seeds for about 12 sq. in.; upland cress, 250 seeds for about 15'; watercress, 250 seeds.
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