Superthrive helps plants grow faster by stimulating the production of natural hormones. Works great with hydroponics and soil gardening. It is also ideal for young plant seedlings to get a quick start on life or for reviving older and sickly plants back to health. Superthrive can be used every time you water your plants. Superthrive is not a fertilizer therefore you may use it in addition to your normal fertilizer or plant food. Restricted states: ID, MN, OK, OR, WI.