Humboldt Master B is one of a two-part fertilizer designed for all plants. Used in conjunction with Master A it is formulated to provide your plants with higher absorption rates of nutrients, vitamins, minerals, and trace elements.
Humboldt Master B is one of a two-part fertilizer designed for all plants. Used in conjunction with Master A it is formulated to provide your plants with higher absorption rates of nutrients, vitamins, minerals, and trace elements.