High-phosphorus, high-potassium bloom formula with complete micronutrients. MasterBlend 0-20-42 Cannabis Bloom Formula is a water-soluble fertilizer designed for the flowering stage of cannabis cultivation. This updated formulation replaces the previous 0-12-24 blend with increased phosphorus and potassium levels optimized for bud development.
Formulated for Flowering Stage
Zero nitrogen content allows precise control of vegetative vs. reproductive growth during bloom. The 0-20-42 NPK ratio delivers high phosphorus for flower initiation and potassium for bud density, terpene production, and stress tolerance. Complete with chelated micronutrients essential for enzyme function and metabolic processes.
Key Features
- NPK formula: 0-20-42 with complete micronutrients
- Zero nitrogen for bloom-stage control
- High purity, fully water-soluble
- Compatible with all continuous feed programs
- Suitable for hydroponic and soil-based systems
- Ideal for concentrated stock solutions and fertigation
- Pair with your preferred calcium nitrate and magnesium sulfate sources
Application
Use as the bloom-stage component in a multi-part nutrient program. Combine with calcium nitrate and magnesium sulfate according to your crop protocol and growth stage. Suitable for drip irrigation, NFT, DWC, and other hydroponic methods, as well as soil-based fertigation systems.
Specifications
- Package size: 25 lb bag
- SKU: MB-BLOOM-25lb.-2
- Replaces previous 0-12-24 formulation
Technical Documentation
- Easy to use: Use with any calcium nitrate and magnesium sulfate to make a complete cannabis nutrient solution.
- High Analysis: 0-20-42 water soluble fertilizer complete with all essential micronutrients.
- Pure: Manufactured from the highest quality technical grade materials, MasterBlend water-soluble fertilizers for greenhouse and controlled environment agriculture provide the highest level of balanced nutrition available for flowering cannabis and hemp grown in a soil medium or hydroponic system.
- Water Soluble: High solubility, ideal for making concentrated stock solutions for automatic fertilizer injection systems.
Guaranteed Analysis:
| Total Nitrogen (N) | 0% |
| Available Phosphate (P2O5) | 20% |
| Soluble Potash (K2O) | 42% |
| Magnesium (Mg) (Total) | 0.0% |
| 0% Water Soluble Magnesium (Mg) | |
| Sulfur (S) | 9% |
| Boron (B) | 0.03% |
| Copper (Cu) | 0.02% |
| 0.01% Chelated Copper (Cu) | |
| Iron (Fe) | 0.35% |
| 0.20% Chelated Iron (Fe) | |
| Manganese (Mn) | 0.09% |
| 0.05% Chelated Manganese (Mn) | |
| Molybdenum (Mo) | 0.01% |
| Zinc (Zn) | 0.02% |
| 0.01% Chelated Zinc (Zn) | |
Plant nutrients derived from:
potassium phosphate, potassium sulfate, boric acid, copper EDTA, copper sulfate, iron DTPA, manganese EDTA, sodium molybdate, zinc EDTA
Potential Basicity:
Lbs. calcium carbonate equivalent per ton.
Maximum Solubility:
1 lb. per gallon
CAUTION: Some crops may be injured by application of Boron.
This fertilizer is to be used only on soils that respond to Molybdenum. Crops high in Molybdenum are toxic to ruminant animals.
Mixing rates:
FLOWERING plants: Mix 10.7 oz. of Master Blend 0-20-42 in 100 gallons of water, along with 14.1 oz. of calcium nitrate and 8.3 ounces of magnesium sulfate(epsom salt). For small volumes use 3-grams of Mater Blend 0-20-42- and 4-grams of calcium nitrate and 2.3-grams magnesium sulfate per gallon of final volume working solution. This will give a nutrient profile of approximately:
164ppm N - 69ppm P - 276ppm K - 60ppm Mg - 201ppm Ca - 150ppm S
2.8ppm Fe - 0.159ppm Zn - 0.238ppm B - 0.159ppm Cu - 0.079ppm Mo - 0.7ppm Mn
With an estimated EC of 2.2 mS/cm.
MasterBlend 0-20-42 Cannabis Bloom Formula - 25 lb
MasterBlend 0-20-42 Cannabis Bloom Formula - 25 lb
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