Soil moist 3 ounces water management granules are designed to reduce plant watering by absorbing 200 times their weight in water and releasing a steady supply of water to the plant as needed. they are excellent for annuals and new transplants. these granules are effective in the soil for 3 to 5 years and are ideal for interior and exterior plantings such as trees, shrubs, containers, baskets, flower beds, vegetables, and turf. soil moist acts as a form of insurance for the plant and is environmentally friendly.