White Widow is an exciting and powerful new product from Humboldt. This soluble powder Mycorrhizal contains extremely high and diverse amount of mycological spores. Humboldt made this special formula to increase the speed and aggressiveness of your plant's root development. You will notice that root transformation is unprecedented in horticultural and hydroponic systems alike. It is also bacteria free! White Widow is a must have for all gardeners! Quantity: 8 oz.