Cress Seeds - WatercressNasturtium officinale Perennial. Watercress thrives in cold running water along streambanks in temperate zones. Can also be grown in moist soil with a little shade in the garden or in containers. Healthy and nutritious the sharp, peppery leaves can be frequently but lightly harvested. Seeds Per Package: 1 oz Approximately 22,800 Seeds 4 oz Approximately 91,200 Seeds 1 lb Approximately 364,800 Seeds 5 lb Approximately 1,824,000 Seeds 25 lb