Seed Needs, True Watercress (Nasturtium officinale) 500 Seeds Non-GMO Quality Watercress seeds packaged by Seed Needs. Intended for the current and the following growing season. Packets are 3.25" wide by 4.50" tall and come with a full colored illustration on the front side, as well as detailed sowing instructions on the reverse. Watercress is an aquatic, or semi-aquatic plant that establishes itself in shallow bodies of water, such as ponds, streams and on the edge of rivers. They are known to grow to a mature height of roughly 18 to 24 inches tall, producing delicious green leaves. The leaves are rounded and the stems are hollow. Both are edible when harvested, and can be added to salads as a Spinach alternative. You might consider harvesting the leaves prior to flowering as they hold the best flavor when young. Watercress is categorized as an annual herb / vegetable. Annuals will establish themselves in a single growing season, producing stems, leaves and flowers prior to wilting away during the first killing frost. All Watercress seeds sold by Seed Needs are Non-GMO based seed products and are intended for the current & the following growing season. All seeds are produced from open pollinated plants, stored in a temperature controlled facility and constantly moved out due to popularity.