Humboldt Nutrients

Click here to view the Humboldt Nutrients feed charts.

Unlike our competition, we never buy liquidated inventory or old, deeply-discounted, soon-to-be-expired nutrients. We receive new products every few days, so when you buy from GYOstuff, rest assured you’re buying only the freshest nutrients for your plants.

     
    61 - 120 of 153 items
    Sort By:
    DeuceDeuce 5 gal. DeuceDeuce 15 gal. Equilibrium Natural, 16 oz
    DeuceDeuce 5 gal.DeuceDeuce 15 gal.Equilibrium Natural, 16 oz

    Improves root health and mass resulting in increased blooms and a hardier plant.

    Improves root health and mass resulting in increased blooms and a hardier plant.

    Calcium and magnesium supplement for soil and hydroponics.

    $313.95

    $279.99

    $929.95

    $829.99

    $12.38

    Equilibrium Natural, 32 oz Equilibrium Natural, 1 gal Equilibrium Natural, 2.5 gal
    Equilibrium Natural, 32 ozEquilibrium Natural, 1 galEquilibrium Natural, 2.5 gal

    Calcium and magnesium supplement for soil and hydroponics.

    Calcium and magnesium supplement for soil and hydroponics.

    Calcium and magnesium supplement for soil and hydroponics.

    $21.56

    $75.00

    $178.12

    Equilibrium Natural, 5 gal FlavorFul 32 oz. FlavorFul 1 gal.
    Equilibrium Natural, 5 galFlavorFul 32 oz.FlavorFul 1 gal.

    Calcium and magnesium supplement for soil and hydroponics.

    Humic acid supplement, increases nutrient uptake resulting in better overall growth.

    Humic acid supplement, increases nutrient uptake resulting in better overall growth.

    $338.44

    $307.99

    $18.44

    $17.49

    $61.45

    $57.99

    FlavorFul 2.5 gal. FlavorFul 5 gal. FlavorFul 15 gal.
    FlavorFul 2.5 gal.FlavorFul 5 gal.FlavorFul 15 gal.

    Humic acid supplement, increases nutrient uptake resulting in better overall growth.

    Humic acid supplement, increases nutrient uptake resulting in better overall growth.

    Humic acid supplement, increases nutrient uptake resulting in better overall growth.

    $141.34

    $129.99

    $245.79

    $223.99

    $631.80

    $569.99

    Ginormous 16 oz. Ginormous 32 oz. Ginormous 1 gal.
    Ginormous 16 oz.Ginormous 32 oz.Ginormous 1 gal.

    Amazing foliar spray for early flowering, allows for quicker transition and larger fruits.

    Amazing foliar spray for early flowering, allows for quicker transition and larger fruits.

    Amazing foliar spray for early flowering, allows for quicker transition and larger fruits.

    $16.00

    $30.00

    $99.95

    Ginormous 2.5 gal. Ginormous 5 gal. Ginormous 15 gal
    Ginormous 2.5 gal.Ginormous 5 gal.Ginormous 15 gal

    Amazing foliar spray for early flowering, allows for quicker transition and larger fruits.

    Amazing foliar spray for early flowering, allows for quicker transition and larger fruits.

    Amazing foliar spray for early flowering, allows for quicker transition and larger fruits.

    $226.60

    $212.99

    $409.95

    $359.99

    $1,179.95

    $1,049.99

    Honey Hydro Carbs 16 oz. Honey Hydro Carbs 32 oz. Honey Hydro Carbs 1 gal.
    Honey Hydro Carbs 16 oz.Honey Hydro Carbs 32 oz.Honey Hydro Carbs 1 gal.

    Sugars and carbs for improved flavor and aroma in hydroponic plants.

    Sugars and carbs for improved flavor and aroma in hydroponic plants.

    Sugars and carbs for improved flavor and aroma in hydroponic plants.

    $7.40

    $12.88

    $43.28

    Honey Hydro Carbs 2.5 gal. Honey Hydro Carbs 5 gal. Honey Organic ES 16 oz.
    Honey Hydro Carbs 2.5 gal.Honey Hydro Carbs 5 gal.Honey Organic ES 16 oz.

    Sugars and carbs for improved flavor and aroma in hydroponic plants.

    Sugars and carbs for improved flavor and aroma in hydroponic plants.

    Organic source of sugar and carbs for soil and coco gardens. Improves flavor and aroma of plants.

    $93.60

    $163.80

    $13.40

    Honey Organic ES 32 oz. Honey Organic ES 1 gal. Honey Organic ES 2.5 gal.
    Honey Organic ES 32 oz.Honey Organic ES 1 gal.Honey Organic ES 2.5 gal.

    Organic source of sugar and carbs for soil and coco gardens. Improves flavor and aroma of plants.

    Organic source of sugar and carbs for soil and coco gardens. Improves flavor and aroma of plants.

    Organic source of sugar and carbs for soil and coco gardens. Improves flavor and aroma of plants.

    $23.40

    $73.72

    $168.48

    Honey Organic ES 5 gal. Honey Organic ES 15 gal Honey Organic ES, 55 gal
    Honey Organic ES 5 gal.Honey Organic ES, 15 galHoney Organic ES, 55 gal

    Organic source of sugar and carbs for soil and coco gardens. Improves flavor and aroma of plants.

    Organic source of sugar and carbs for soil and coco gardens. Improves flavor and aroma of plants.

    Organic source of sugar and carbs for soil and coco gardens. Improves flavor and aroma of plants.

    $301.86

    $269.99

    $848.24

    $749.99

    $2,749.95

    $2,439.99

    This item ships freight.

    Hum-bolt humic 32 oz. Hum-bolt Humic 1 gal. Hum-bolt Humic 2.5 gal.
    Hum-bolt Humic 32 oz.Hum-bolt Humic 1 gal.Hum-bolt Humic 2.5 gal.

    Humic acid supplementation for increased nutrient uptake, resulting in better overall plant growth.

    Humic acid supplementation for increased nutrient uptake, resulting in better overall plant growth.

    Humic acid supplementation for increased nutrient uptake, resulting in better overall plant growth.

    $18.44

    $17.29

    $61.45

    $56.99

    $141.34

    $128.99

    Hum-bolt humic 5 gal. Hum-bolt Humic 15 gal Humboldt Roots, 50 ml
    Hum-bolt Humic 5 gal.Hum-bolt Humic 15 galHumboldt Roots, 50 ml

    Humic acid supplementation for increased nutrient uptake, resulting in better overall plant growth.

    Humic acid supplementation for increased nutrient uptake, resulting in better overall plant growth.

    Highly concentrated organic root stimulant.

    $245.79

    $223.99

    $631.80

    $569.99

    $21.95

    Humboldt Roots, 125 ml Humboldt Roots, 250 ml Humboldt Roots, 500 ml
    Humboldt Roots, 125 mlHumboldt Roots, 250 mlHumboldt Roots, 500 ml

    Highly concentrated organic root stimulant.

    Highly concentrated organic root stimulant.

    Highly concentrated organic root stimulant.

    $42.95

    $71.95

    $118.95

    Humboldt Roots, 1/2 gal Humboldt Roots, 1 gal Hydro Deuce 16 oz
    Humboldt Roots, 1/2 galHumboldt Roots, 1 galHydro Deuce 16 oz

    Highly concentrated organic root stimulant.

    Highly concentrated organic root stimulant.

    Great potassium booster for hydroponic systems.

    $399.95

    $354.99

    $724.95

    $649.99

    $12.62

    Hydro Deuce 32 oz Hydro Deuce 1 gal Hydro Deuce 2.5 gal
    Hydro Deuce 32 ozHydro Deuce 1 galHydro Deuce 2.5 gal

    Great potassium booster for hydroponic systems.

    Great potassium booster for hydroponic systems.

    Great potassium booster for hydroponic systems.

    $21.94

    $76.28

    $181.16

    Hydro Deuce 5 gal Mayan Microzyme 8 oz. Mayan Microzyme 16 oz.
    Hydro Deuce 5 galMayan Microzyme 8 oz.Mayan Microzyme 16 oz.

    Great potassium booster for hydroponic systems.

    Beneficial microbes for improved root zone and nitrogen uptake.

    Beneficial microbes for improved root zone and nitrogen uptake.

    $344.20

    $309.99

    $31.62

    $28.99

    $57.20

    $52.99

    Mayan Microzyme 32 oz. Mayan Microzyme 1 gal. Myco Madness Soluble 2 oz
    Mayan Microzyme 32 oz.Mayan Microzyme 1 gal.Myco Madness Soluble 2 oz

    Beneficial microbes for improved root zone and nitrogen uptake.

    Beneficial microbes for improved root zone and nitrogen uptake.

    A soluble blend of mycorrhizae, beneficial bacteria, Trichoderma and humic acid.

    $95.34

    $87.99

    $345.80

    $317.99

    $14.95

    Myco Madness Soluble 4 oz Myco Madness Soluble 8 oz Myco Madness Soluble 1 lb
    Myco Madness Soluble 4 ozMyco Madness Soluble 8 ozMyco Madness Soluble 1 lb

    A soluble blend of mycorrhizae, beneficial bacteria, Trichoderma and humic acid.

    A soluble blend of mycorrhizae, beneficial bacteria, Trichoderma and humic acid.

    A soluble blend of mycorrhizae, beneficial bacteria, Trichoderma and humic acid.

    $25.95

    $49.95

    $89.95

    Myco Madness Soluble 5 lb Myco Madness Soluble 20 lb Myco Madness Soluble 120 lb
    Myco Madness Soluble 5 lbMyco Madness Soluble 20 lbMyco Madness Soluble 120 lb

    A soluble blend of mycorrhizae, beneficial bacteria, Trichoderma and humic acid.

    A soluble blend of mycorrhizae, beneficial bacteria, Trichoderma and humic acid.

    A soluble blend of mycorrhizae, beneficial bacteria, Trichoderma and humic acid.

    $399.95

    $354.99

    $1,346.95

    $1,209.99

    $6,919.95

    $5,999.99

    Myco Maximum Granular 8 oz Myco Maximum Granular 1 lb Myco Maximum Granular 5 lb
    Myco Maximum Granular 8 ozMyco Maximum Granular 1 lbMyco Maximum Granular 5 lb

    A granular blend of mycorrhizae, beneficial bacteria, Trichoderma and humic acid.

    A granular blend of mycorrhizae, beneficial bacteria, Trichoderma and humic acid.

    A granular blend of mycorrhizae, beneficial bacteria, Trichoderma and humic acid.

    $29.95

    $49.95

    $199.95

    61 - 120 of 153 items