Grow indoor. Grow outdoor. Grow with us.Providing superior results in both soil and hydroponic gardens, GENERAL HYDROPONIC nutrients offer total nutrition as a mineral-based plant food. Since they lack soil, hydroponic systems rely on nutrient solution to provide the essential elements that plants need. Unlike most commonly available plant food, hydroponic fertilizers must contain the entire spectrum of necessary elements. That makes them a robust and complete nutrient source suitable for all gardens.