Master-A, 32 oz.

NPK 4-0-3

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.

The Humboldt Nutrients team of chemists and agronomists emphasize balance and consistency with all our formulas. Master A&B is formulated to provide your favorite plants with higher absorption of nutrients, vitamins, minerals and trace elements.

The Master A&B series stands apart from your standard base nutrient line by making macro and micro nutrients more available to your plant.

Used in conjunction with Humboldt Nutrients powerful additives we assure that your yields and quality will increase so dramatically, that your friends will call you simply, “The Master.”

DIRECTIONS: Use 1:1 Ratio with Master A&B as a two-part Base Bloom Nutrient. Adjust PPM higher in later stages of the bloom cycle to desired strength.

DERIVED FROM: Ammonium Nitrate, Potassium Nitrate, Calcium Nitrate, Sodium Molybdate, Calcium Carbonate, Sodium Borate, Iron, Zinc, Manganese, Boron and Molybendum.

Frequently Asked Questions

Q: What does N-P-K stand for on my nutrient?

A: N-P-K is the abbreviated form of Nitrogen, Phosphorus and Potassium within a nutrient formula. The numbers labled on a specific formula represent the percentage of that compound. Ex. 2-6-6 is 2 percent Nitrogen and 6 percent Phosphorus and Potassium.