RX Green Technologies Dry Part A (4-16-21), 25 lb Bag

RX Green Technologies Dry Part A (4-16-21) is a premium water-soluble fertilizer designed as the foundation of a three-part nutrient program for hydroponic and soilless systems. Developed with pharmaceutical-grade ingredients, it dissolves fully for consistent delivery in recirculating reservoirs, drip lines, or stock tanks—no sludge, no clogs.
Independent lab analysis confirms no detectable heavy metals, even at extremely low detection limits, ensuring a cleaner nutrient profile for sensitive crops.

This Part A formula delivers the phosphorus and potassium needed for root development and flowering, plus magnesium for chlorophyll production and enhanced photosynthesis. Use in combination with Part B and PK for a balanced feeding program from vegetative growth through late bloom.

Guaranteed Analysis

Derived From

Monopotassium phosphate, potassium sulfate, magnesium sulfate, ammonium sulfate, ammonium phosphate, magnesium nitrate, potassium nitrate, boric acid, copper EDTA, iron DTPA, manganese EDTA, sodium molybdate, zinc EDTA.

Mixing Instructions

For Hydroponic Reservoirs

• Vegetative: 2.5 g Part A + 4.5 g Part B per gallon

• Flowering: 2.5 g Part A + 4.5 g Part B per gallon
  Mix Part A completely in water before adding Part B to prevent precipitation.

For Stock Tanks (1:100 Injection)

• Dissolve 250 g Part A per gallon in a separate tank from Part B.

• Do not exceed recommended concentrations to ensure full solubility.

Pro Tip: Adjust source water pH to below 7.0 before mixing for best stability. Compatible with RO and filtered water sources.

Key Benefits

• Hydroponic-grade purity – dissolves completely with no sediment.

• Zero detectable heavy metals – tested to stringent industry standards.

• High magnesium content for strong leaf color and enzyme activation.

• Balanced phosphorus and potassium to support both root and bloom stages.

• Chelated micronutrients for maximum uptake in a wide pH range.