Humboldt Nutrients Master-B
Best two-part base nutrient for growers seeking maximized bloom yields.
Humboldt Nutrients Master-B is a premium, two-part fertilizer designed for all plants and compatible with any growing medium. This vigorous formula, part of the Master A&B program, is crafted with high-quality, non-toxic ingredients to ensure superior nutrient availability. It focuses on providing enhanced absorption of essential macro and micro nutrients, vitamins, minerals, and trace elements compared to standard base nutrient lines. For best results, use Master-B in a 1:1 ratio with Master A as a base bloom nutrient. Growers can adjust the PPM in later bloom stages to meet specific plant needs, aiming for dramatically increased yields and quality.
$81.99
Owner Satisfaction
4.5
/ 5
Category Rank
3091
/ 4425
#3091 in Fertilizers
Price vs Category Average
+33%
Above average
NPK Ratio
156
/ --
Who it's for
- Gardeners managing plants through heat waves or transplanting
- Growers seeking faster growth and improved plant vitality
- Cultivators wanting a simple addition to existing nutrient programs
Who should skip it
- Indoor gardeners with limited climate-controlled storage space
- Budget-conscious growers maintaining already thriving, healthy gardens
- Hobbyists looking to minimize recurring monthly fertilizer costs
Performance breakdown
Nutrient Bioavailability
Advanced formulation ensures rapid uptake of essential macro and micro nutrients.
Yield Potential
Designed to push plant productivity to its maximum genetic capacity.
Ease of Application
Simple 1:1 mixing ratio makes complex feeding schedules feel effortless.
Medium Versatility
Performs consistently across soil, coco, and hydroponic growing environments.
Ingredient Purity
High-quality synthetic inputs minimize risk of toxic buildup or contamination.
Bloom Support
Optimized NPK ratio drives robust flower development and structural integrity.
Key Specs
NPK Ratio
1-5-6
Package Size
1 Gallon
Formulation
Liquid Concentrate
Fertilizer Source
Synthetic
Nitrogen Percentage
1.0%
Phosphorus Percentage
5.0%
Potassium Percentage
6.0%
Application Method
Use 1:1 Ratio with Master A&B
Features
- Premium two-part fertilizer program
- Formulated for all plants and mediums
- Enhances nutrient absorption
- Made with high-quality ingredients
- Promotes balance and consistency
- Designed for increased yields and quality
- Contains essential trace elements
- Synthetic nutrient source
What customers say
Growers consistently praise this product for its reliable efficacy and noticeable improvements in plant health. It significantly aids stress recovery and promotes vigorous growth, establishing itself as a trusted component in advanced feeding schedules. Users value how easily it integrates into their existing regimen. This strong performance justifies the investment, making it a high value additive for serious cultivation efforts focused on quality results.
Know before you buy
Yes, Master-B is designed as part of a two-part system. For optimal results and to maintain the correct nutrient balance, it must be used in a 1:1 ratio with Master-A.
Yes, Master-B is formulated to be compatible with all growing mediums, including hydroponics, soil, and coco coir.
Humboldt Nutrients Master-B has an NPK ratio of 1-5-6, providing a higher concentration of phosphorus and potassium to support the bloom phase.
Master-B is a synthetic nutrient source. It is engineered for quick release and high bioavailability to ensure plants can absorb essential minerals and trace elements rapidly.
No, this formula is specifically crafted without the use of EDTA, focusing on high-quality, non-toxic ingredients for nutrient delivery.
Master-B is versatile and safe for all plant types, including houseplants, vegetables, flowers, trees, and shrubs.
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