Oasis’s researchers have taken years of growing experience and developed a fertilizer specifically designed for home owners and hobby growers for leafy greens, Vegetables, flowers and potted plants. The water-soluble formula instantly nourishes the plants and maintains the plants vigor. Fertilizer works with both standard soil medias as well as hydroponic environments. Each Fertilizer Sachet is measured to be mixed with one gallon of water and is ready to use. 20 sachets per package.