USDA Zones: 5 - 11
Height: 12 - 24 inches
Bloom Season: Late spring to mid summer
Bloom Color: White
Environment: Partial shade
Soil Type: Varying soil types as long as they are saturated, pH 6.5 - 7.5
Temperature: 50 - 60F
Average Germ Time: 7 - 14 days
Light Required: No
Depth: 1/4 inch
Sowing Rate: 15 - 20 seeds per plant
Moisture: Keep seeds moist until germination
Plant Spacing: 9 - 12 inches
Watercress (Nasturtium Officinale) - Watercress seeds are grown for both a culinary and medicinal herb. It is a succulent, leafy plant that thrives in marshes, bogs and water gardens. The lobed leaves can be eaten raw, cooked or dried. They have a pungent flavor and are crisp. It needs to be harvested before the buds appear as the leaves turn bitter after flowering. It is a fast-growing plant that prefers partial shade. It produces white flowers in mid-summer which are very attractive to bees. Watercress plants are highly ornamental.
As a medicinal herb, it has long been used to treat sore throats and sinus congestion. It is very rich in vitamins and minerals and in alternative medicine, it is used for a wide variety of ailments. Some other common names that watercress is called are: water rocket, water radish, and hedge mustard. It is in the mustard family.
How To Grow Watercress From Seeds: Start seeds for an indoor herb garden. Place the containers in a tray of water and keep the water constantly supplied. Fluorescent lamps or growing lights are needed. The seeds can be started indoors 6 weeks before the last expected frost and then transplanted outdoors. The ideal setting is along a pond or stream bank.