Humboldt Starter Kit-Master AB Humboldt Nutrients Master A&B is a premium two-part fertilizer program designed for all plants made with non-toxic, high quality ingredients. Our Premium Two-Part Basic Starter Kit provides the core nutrients in our Master A and B schedule along with two other important products for successful gardeningGinormous, a bloom booster, and White Widow, a powerful mycorrhizal inoculant This kit acts as a solid base for new or experienced gardeners who want more control over the primary additives and can be expanded with other superb Humboldt Nutrients additives and products. Kit contains the Following: Master A  16oz. Master B  16oz. Ginormous - 16oz. White Widow - 1oz. Humboldt Starter Kit-Master AB