Nutrients & Additives

Mad Farmer’s BE ONE is the most comprehensive B1 additive on the market. In addition to vitamin B1, it is derived from Ascophyllum Nodosum and is infused with Humic Acids and Protein Hydrolysate. BE ONE will assist in all phases of plant growth and help...

Mad Farmer’s BE ONE is the most comprehensive B1 additive on the market. In addition to vitamin B1, it is derived from Ascophyllum Nodosum and is infused with Humic Acids and Protein Hydrolysate. BE ONE will assist in all phases of plant growth and help...

Mad Farmer’s BE ONE is the most comprehensive B1 additive on the market. In addition to vitamin B1, it is derived from Ascophyllum Nodosum and is infused with Humic Acids and Protein Hydrolysate. BE ONE will assist in all phases of plant growth and help...

Mad Farmer’s BE ONE is the most comprehensive B1 additive on the market. In addition to vitamin B1, it is derived from Ascophyllum Nodosum and is infused with Humic Acids and Protein Hydrolysate. BE ONE will assist in all phases of plant growth and help...

Mad Farmer’s BE ONE is the most comprehensive B1 additive on the market. In addition to vitamin B1, it is derived from Ascophyllum Nodosum and is infused with Humic Acids and Protein Hydrolysate. BE ONE will assist in all phases of plant growth and help...

Mad Farmer’s BE ONE is the most comprehensive B1 additive on the market. In addition to vitamin B1, it is derived from Ascophyllum Nodosum and is infused with Humic Acids and Protein Hydrolysate. BE ONE will assist in all phases of plant growth and help...

Rainbow Mix PRO™ Bloom pushes the boundries of what is possible in a powder/granular plant nutrient.A powerful blend of all natural ingredients & 29 different strains of mycorrhizae & beneficial microbes designed fortoday's demanding "High Performance...

Rainbow Mix PRO™ Grow pushes the boundaries of what is possible in a powder/granular plant nutrient.A powerful blend of all natural ingredients & 29 different strains of mycorrhizae & beneficial microbes designed for today’s demanding “High...

Designed for today's high performance gardening. A powerful blend of all natural ingredients and 29 different strains of mycorrhizae and beneficial microbes. Can be used as a pre-mix, booster, and top/side application, and brews a mean plant...

Concentrated Water-Soluble Plant Food with marine bird fossilized guano and steamed bone meal. Bloom Master™ is a concentrated water-soluble bud & bloom plant food supplement designed to increase the vigor and production of flowers and fragrances in...

Water-Soluble Plant Food with seaweed, marine bird fossilized guano, steamed bone meal and micronutrients. SeaBlast Bloom™ is a water-soluble plant food formulated for flowering and fruiting plants. Specifically designed to encourage bountiful yields...

Water-Soluble Plant Food with seaweed, marine bird fossilized guano, steamed bone meal and micronutrients. SeaBlast Grow™ is a water-soluble plant food that will promote vigorous vegetative growth. Ideal for both foliage plants and for the growth phase...

Earth Juice® Hi-BrixTM "Molasses for Plants" -N0.00% -P0.00% -K3.00%This rare and highly prized molasses is a natural source of carbohydrates (sugars) and plant nutrients that has been specially tailored into liquid formulation for indoor and outdoor...

Earth Juice® Hi-BrixTM "Molasses for Plants" -N0.00% -P0.00% -K3.00% This rare and highly prized molasses is a natural source of carbohydrates (sugars) and plant nutrients that has been specially tailored into liquid formulation for indoor and outdoor...

Earth Juice® Hi-BrixTM "Molasses for Plants" -N0.00% -P0.00% -K3.00% This rare and highly prized molasses is a natural source of carbohydrates (sugars) and plant nutrients that have been specially tailored into liquid formulation for indoor and outdoor...

This rare and highly prized molasses is a natural source of carbohydrates (sugars) and plant nutrients that have been specially tailored into liquid formulation for indoor and outdoor plants in soil and hydroponics. It can be used in conjunction with a...

Earth Juice® Hi-BrixTM "Molasses for Plants" -N0.00% -P0.00% -K3.00% This rare and highly prized molasses is a natural source of carbohydrates (sugars) and plant nutrients that has been specially tailored into liquid formulation for indoor and outdoor...

Verde 16-1-2 It's Spanish for green. Lush green colors and vigorous growth are what you can expect with Verde. Used as a foliar spray or as a growth enhancer for hydroponic or soil crops, Verde keeps plants healthy throughout their life cycle.Verde is a...

Verde 16-1-2 It's Spanish for green. Lush green colors and vigorous growth are what you can expect with Verde. Used as a foliar spray or as a growth enhancer for hydroponic or soil crops, Verde keeps plants healthy throughout their life cycle.Verde is a...

Verde 16-1-2 It's Spanish for green. Lush green colors and vigorous growth are what you can expect with Verde. Used as a foliar spray or as a growth enhancer for hydroponic or soil crops, Verde keeps plants healthy throughout their life cycle.Verde is a...

Verde 16-1-2 It's Spanish for green. Lush green colors and vigorous growth are what you can expect with Verde. Used as a foliar spray or as a growth enhancer for hydroponic or soil crops, Verde keeps plants healthy throughout their life cycle.Verde is a...

Verde 16-1-2 It's Spanish for green. Lush green colors and vigorous growth are what you can expect with Verde. Used as a foliar spray or as a growth enhancer for hydroponic or soil crops, Verde keeps plants healthy throughout their life cycle.Verde is a...

Verde 16-1-2 It's Spanish for green. Lush green colors and vigorous growth are what you can expect with Verde. Used as a foliar spray or as a growth enhancer for hydroponic or soil crops, Verde keeps plants healthy throughout their life cycle.Verde is a...

NOT FOR SALE IN OREGON OR HAWAII Bacterial Complex with Biological Nitrogen Fixation (BNF) Mayan MicroZyme is a 100% organic and ecologically safe beneficial bacterial complex with multiple species of soil microorganisms that will increase fertility...

NOT FOR SALE IN OREGON OR HAWAII Bacterial Complex with Biological Nitrogen Fixation (BNF) Mayan MicroZyme is a 100% organic and ecologically safe beneficial bacterial complex with multiple species of soil microorganisms that will increase fertility...

NPK 1-5-6 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...

NPK 1-5-6 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...

Humboldt Roots is a highly concentrated organic root growth supplement that expands the root zone during the critical growth stage. The soul of every plant resides in the roots. Many gardeners neglect this fact and concentrate on the visual aspects of...

Humboldt Roots is a highly concentrated organic root growth supplement that expands the root zone during the critical growth stage. The soul of every plant resides in the roots. Many gardeners neglect this fact and concentrate on the visual aspects of...

Humboldt Roots is a highly concentrated organic root growth supplement that expands the root zone during the critical growth stage. The soul of every plant resides in the roots. Many gardeners neglect this fact and concentrate on the visual aspects of...

Humboldt Roots is a highly concentrated organic root growth supplement that expands the root zone during the critical growth stage. The soul of every plant resides in the roots. Many gardeners neglect this fact and concentrate on the visual aspects of...

Humboldt Nutrients Humboldt Honey ES is a premium blend of cane molasses, yucca, kelp and ocean fish. This carb source is as unique as it is strong. The ES means Extra Strength. It increases brix levels by providing sugars to beneficial bacteria, fungi,...

Humboldt Nutrients Humboldt Honey ES is a premium blend of cane molasses, yucca, kelp and ocean fish. This carb source is as unique as it is strong. The ES means Extra Strength. It increases brix levels by providing sugars to beneficial bacteria, fungi,...

With an available 2% (N), 3.4% (Ca), and 1.4% (Mg) + micronutrients, Calyx Magnum gives gardeners vital nutrients needed for plant development and growth. Another huge benefit is that we created Calyx Magnum without the use of chemical chelates like...

Big Up Powder 0-33-23 A local legend in Humboldt County: Big Up Powder is a premium bloom booster. Humboldt Nutrients agronomists and chemists have developed Big Up Powder after years of research and local trials. Many similar products contain...

House & Garden Top Shooter Top Shooter is the liquid version of Shooting Powder for growers that prefer liquids to powders.  

House & Garden Top Shooter Top Shooter is the liquid version of Shooting Powder for growers that prefer liquids to powders.  

House & Garden Top Shooter Top Shooter is the liquid version of Shooting Powder for growers that prefer liquids to powders.  

House & Garden Top Shooter Top Shooter is the liquid version of Shooting Powder for growers that prefer liquids to powders.  

House & Garden Top Booster Top Booster provides nutrients needed for ripening and helps set the stage for Bud-XL and Shooting Powder.  

House & Garden Top Booster Top Booster provides nutrients needed for ripening and helps set the stage for Bud-XL and Shooting Powder.  

House & Garden Top Booster Top Booster provides nutrients needed for ripening and helps set the stage for Bud-XL and Shooting Powder.  

House & Garden Top Booster Top Booster provides nutrients needed for ripening and helps set the stage for Bud-XL and Shooting Powder.  

House & Garden Top Booster Top Booster provides nutrients needed for ripening and helps set the stage for Bud-XL and Shooting Powder.

House & Garden Top Booster Top Booster provides nutrients needed for ripening and helps set the stage for Bud-XL and Shooting Powder.

House & Garden Roots Excelurator, (silver bottle) Classic formula that is compatible in hydroponic and recirculating systems.  

House & Garden Roots Excelurator, (silver bottle) Classic formula that is compatible in hydroponic and recirculating systems.  

House & Garden Roots Excelurator, (silver bottle) Classic formula that is compatible in hydroponic and recirculating systems.  

House & Garden Roots Excelurator, (silver bottle) Classic formula that is compatible in hydroponic and recirculating systems.