Mother Earth Subterra Root Booster 0-1-1 is an all-purpose liquid plant supplement that helps to establish a strong root system for seedlings, cuttings and vegetative plants. Its unique blend of kelp, brewers yeast, alfalfa meal and more provide your plants with the foundation they need to flourish and seek out necessary nutrients. The liquid supplement is designed to be used with a base fertilizer and all types of plants, soils, and potting mixes.