Humboldt Nutrients Master A & B

Humboldt Nutrients' Master A (NPK: 4.9-0-3.8) and Master B (NPK: 1.5-5.2-6.3) is a naturally derived two-part amino acid-based fertilizer program designed for all plants. 

Using essential amino acid chelates and other complex organic acids, Master A & B will provide your plants with higher absorption of nutrients, vitamins, minerals, and trace elements, resulting in a healthier, more robust garden.

Because amino acid chelates provide a lower salt-index, potential salt build-up is drastically reduced, helping prevent nutrient lock-out.

Also included in Master A & B nutrients are nitrogen, phosphorus, potassium, magnesium, calcium, complex organic compounds, and other trace elements. A scientific blend that allows your plants to effectively utilize ALL available nutrients.

Master A & B is suitable for coco, hydroponic, or conventional soil growing media.

Application rate: Use 1:1 Ratio with Master A & B as a two-part Base Nutrient, then add 2 - 10.5 mL per gallon. Adjust PPM higher in later stages of the bloom cycle to desired strength.

Humboldt Nutrients has both a light and a moderate Master A & B feeding schedule. Find them here.

Sold in sets - one each Master A and Master B.