Humboldt Nutrients Master A&B is a premium two-part fertilizer program designed for all plants made with non-toxic, high quality ingredients.

Humboldt Nutrients has formulated this vigorous 2-part nutrient solution for use on any plant, in any growing medium and contains no EDTA’s.

Master A&B is formulated to provide your favorite plants with higher absorption of nutrients, vitamins, minerals and trace elements.

The Humboldt Nutrients team of chemists and agronomists emphasize balance and consistency with all our formulas. The nitrogen and potassium present in Master A are combined with calcium and molybdenum, allowing your plants to effectively utilize all available nutrients.