SUPERthrive can be used for: trees, houseplants, potted plants, hydroponics, hanging plants, orchids, plumerias or any kind of plant you want. Safe and non toxic. Durable under a wide range of conditions. Easy and simple to use. We currently stock the following sizes: 2 ounces, 4 ounces, 1 pint, 1 quart and 1 gallon. Other sizes are available by special order: 1/2 ounce and 1 ounce.