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.

     
    1 - 153 of 153 items
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    Master-A, 16 oz. Master-A, 32 oz. Master-A, 1 gal.
    Master-A, 16 oz.Master-A, 32 oz.Master-A, 1 gal.

    Humboldt's advanced grower 2 part nutrient solution.

    Humboldt's advanced grower 2 part nutrient solution.

    Humboldt's advanced grower 2 part nutrient solution.

    $13.40

    $23.40

    $70.20

    Master-A, 2.5 gal. Master-A, 5 gal. Master-A 15 gal
    Master-A, 2.5 gal.Master-A, 5 gal.Master-A 15 gal

    Humboldt's advanced grower 2 part nutrient solution.

    Humboldt's advanced grower 2 part nutrient solution.

    Humboldt's advanced grower 2 part nutrient solution.

    $146.24

    $270.38

    $248.99

    $682.65

    $613.99

    Master-B 16 oz. Master-B, 32 oz. Master-B, 1 gal.
    Master-B 16 oz.Master-B, 32 oz.Master-B, 1 gal.

    Humboldt's advanced grower 2 part nutrient solution.

    Humboldt's advanced grower 2 part nutrient solution.

    Humboldt's advanced grower 2 part nutrient solution.

    $13.40

    $23.40

    $70.20

    Master-B, 2.5 gal. Master-B, 5 gal. Master-B 15 gal
    Master-B, 2.5 gal.Master-B, 5 gal.Master-B 15 gal

    Humboldt's advanced grower 2 part nutrient solution.

    Humboldt's advanced grower 2 part nutrient solution.

    Humboldt's advanced grower 2 part nutrient solution.

    $146.24

    $270.38

    $248.99

    $682.65

    $613.99

    Humboldt Nutrients Grow 16 oz. Humboldt Nutrients Grow 32 oz. Humboldt Nutrients Grow 1 gal.
    Humboldt Nutrients Grow 16 oz.Humboldt Nutrients Grow 32 oz.Humboldt Nutrients Grow 1 gal.

    Humboldt's vegetative portion of their 3 part nutrient solution.

    Humboldt's vegetative portion of their 3 part nutrient solution.

    Humboldt's vegetative portion of their 3 part nutrient solution.

    $6.60

    $11.70

    $29.84

    Humboldt Nutrients Grow 2.5 gal. Humboldt Nutrients Grow 5 gal. Humboldt Nutrients Grow 15 gal
    Humboldt Nutrients Grow 2.5 gal.Humboldt Nutrients Grow 5 gal.Humboldt Nutrients Grow 15 gal

    Humboldt's vegetative portion of their 3 part nutrient solution.

    Humboldt's vegetative portion of their 3 part nutrient solution.

    Humboldt's vegetative portion of their 3 part nutrient solution.

    $65.52

    $117.00

    $333.44

    $296.99

    Humboldt Nutrients Micro 16 oz. Humboldt Nutrients Micro 32 oz. Humboldt Nutrients Micro 1 gal.
    Humboldt Nutrients Micro 16 oz.Humboldt Nutrients Micro 32 oz.Humboldt Nutrients Micro 1 gal.

    Humboldt's Micro formula for their 3 part nutrient solution.

    Humboldt's Micro formula for their 3 part nutrient solution.

    Humboldt's Micro formula for their 3 part nutrient solution.

    $9.08

    $15.80

    $36.28

    Humboldt Nutrients Micro 2.5 gal. Humboldt Nutrients Micro 5 gal. Humboldt Nutrients Micro 15 gal
    Humboldt Nutrients Micro 2.5 gal.Humboldt Nutrients Micro 5 gal.Humboldt Nutrients Micro 15 gal

    Humboldt's Micro formula for their 3 part nutrient solution.

    Humboldt's Micro formula for their 3 part nutrient solution.

    Humboldt's Micro formula for their 3 part nutrient solution.

    $83.06

    $159.12

    $429.62

    $379.99

    Humboldt Nutrients Bloom 16 oz. Humboldt Nutrients Bloom 32 oz. Humboldt Nutrients Bloom 1 gal
    Humboldt Nutrients Bloom 16 oz.Humboldt Nutrients Bloom 32 oz.Humboldt Nutrients Bloom 1 gal

    Humboldt's bloom portion of their three part nutrient solution.

    Humboldt's bloom portion of their three part nutrient solution.

    Humboldt's bloom portion of their three part nutrient solution.

    $6.60

    $11.70

    $29.84

    Humboldt Nutrients Bloom 2.5 gal Humboldt Nutrients Bloom 5 gal Humboldt Nutrients Bloom 15 gal
    Humboldt Nutrients Bloom 2.5 galHumboldt Nutrients Bloom 5 galHumboldt Nutrients Bloom 15 gal

    Humboldt's bloom portion of their three part nutrient solution.

    Humboldt's bloom portion of their three part nutrient solution.

    Humboldt's bloom portion of their three part nutrient solution.

    $65.52

    $117.00

    $333.44

    $296.99

    Grow Natural 16 oz. Grow Natural 32 oz. Grow Natural 1 gal
    Grow Natural 16 oz.Grow Natural 32 oz.Grow Natural 1 gal

    Humboldt's natural grow formula for minimal salt build up, part of their natural 3 part solution.

    Humboldt's natural grow formula for minimal salt build up, part of their natural 3 part solution.

    Humboldt's natural grow formula for minimal salt build up, part of their natural 3 part solution.

    $15.14

    $26.32

    $93.60

    Grow Natural 2.5 gal. Grow Natural 5 gal. Grow Natural 15 gal
    Grow Natural 2.5 gal.Grow Natural 5 gal.Grow Natural 15 gal

    Humboldt's natural grow formula for minimal salt build up, part of their natural 3 part solution.

    Humboldt's natural grow formula for minimal salt build up, part of their natural 3 part solution.

    Humboldt's natural grow formula for minimal salt build up, part of their natural 3 part solution.

    $233.51

    $219.99

    $421.20

    $374.99

    $1,169.95

    $1,039.99

    Bloom Natural 32 oz. Bloom Natural 1 gal Bloom Natural 2.5 gal.
    Bloom Natural 32 oz.Bloom Natural 1 galBloom Natural 2.5 gal.

    Humboldt's natural Bloom formula for their three part nutrient solution.

    Humboldt's natural Bloom formula for their three part nutrient solution.

    Humboldt's natural Bloom formula for their three part nutrient solution.

    $27.65

    $25.99

    $98.31

    $89.99

    $233.51

    $214.99

    Bloom Natural 5 gal. Bloom Natural 15 gal Oneness 16 oz.
    Bloom Natural 5 gal.Bloom Natural 15 galOneness 16 oz.

    Humboldt's natural Bloom formula for their three part nutrient solution.

    Humboldt's natural Bloom formula for their three part nutrient solution.

    Humboldt's 1 part nutrient solution for beginner gardeners.

    $421.20

    $374.99

    $1,169.95

    $1,039.99

    $13.00

    Oneness 32 oz. Oneness 1 gal Oneness 2.5 gal.
    Oneness 32 oz.Oneness 1 galOneness 2.5 gal.

    Humboldt's 1 part nutrient solution for beginner gardeners.

    Humboldt's 1 part nutrient solution for beginner gardeners.

    Humboldt's 1 part nutrient solution for beginner gardeners.

    $24.00

    $85.08

    $195.00

    Oneness 5 gal. Oneness, 15 gal Big Up Powder 2 oz.
    Oneness 5 gal.Oneness, 15 galBig Up Powder 2 oz.

    Humboldt's 1 part nutrient solution for beginner gardeners.

    Humboldt's 1 part nutrient solution for beginner gardeners.

    Humboldt's bloom booster for robust fruits and flowers.

    $364.95

    $327.99

    $1,050.00

    $929.99

    $9.90

    Big Up Powder 4 oz. Big Up Powder 8 oz. Big Up Powder 1 lb.
    Big Up Powder 4 oz.Big Up Powder 8 oz.Big Up Powder 1 lb.

    Humboldt's bloom booster for robust fruits and flowers.

    Humboldt's bloom booster for robust fruits and flowers.

    Humboldt's bloom booster for robust fruits and flowers.

    $17.26

    $30.00

    $50.00

    Big Up Powder 5 lb. Big Up Powder 10 lb. Big Up Powder 20 lb.
    Big Up Powder 5 lb.Big Up Powder 10 lb.Big Up Powder 20 lb.

    Humboldt's bloom booster for robust fruits and flowers.

    Humboldt's bloom booster for robust fruits and flowers.

    Humboldt's bloom booster for robust fruits and flowers.

    $200.00

    $379.95

    $339.99

    $727.95

    $649.99

    Calyx Magnum, 32 oz. Calyx Magnum, 1 gal DeuceDeuce 16 oz.
    Calyx Magnum, 32 oz.Calyx Magnum, 1 galDeuceDeuce 16 oz.

    Multiple nutrient supplement for early growth, improves hardiness of plant and overall health.

    Multiple nutrient supplement for early growth, improves hardiness of plant and overall health.

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

    $19.32

    $48.02

    $11.50

    DeuceDeuce 32 oz. DeuceDeuce 1 gal. DeuceDeuce 2.5 gal.
    DeuceDeuce 32 oz.DeuceDeuce 1 gal.DeuceDeuce 2.5 gal.

    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.

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

    $20.00

    $70.00

    $165.00

    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

    Myco Maximum Granular 10 lb Myco Maximum Granular 20 lb ProZyme 16 oz.
    Myco Maximum Granular 10 lbMyco Maximum Granular 20 lbProZyme 16 oz.

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

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

    Enzymatic formula that increases the rate of chemical reactions in the reservoir.

    $359.95

    $323.99

    $599.95

    $549.99

    $23.00

    ProZyme 32 oz. ProZyme 1 gal ProZyme 5 gal.
    ProZyme 32 oz.ProZyme 1 galProZyme 5 gal.

    Enzymatic formula that increases the rate of chemical reactions in the reservoir.

    Enzymatic formula that increases the rate of chemical reactions in the reservoir.

    Enzymatic formula that increases the rate of chemical reactions in the reservoir.

    $40.00

    $140.00

    $659.95

    $589.99

    ProZyme 15 gal ProZyme 55 gal Royal Flush 16 oz
    ProZyme 15 galProZyme 55 galRoyal Flush 16 oz

    Enzymatic formula that increases the rate of chemical reactions in the reservoir.

    Enzymatic formula that increases the rate of chemical reactions in the reservoir.

    Salt leeching flushing solution for healthier plants and a better finished product.

    $1,849.95

    $1,659.99

    $6,050.00

    $5,379.99

    This item ships freight.

    $8.33

    Royal Flush 32 oz Royal Flush 1 gal Royal Flush 2.5 gal
    Royal Flush 32 ozRoyal Flush 1 galRoyal Flush 2.5 gal

    Salt leeching flushing solution for healthier plants and a better finished product.

    Salt leeching flushing solution for healthier plants and a better finished product.

    Salt leeching flushing solution for healthier plants and a better finished product.

    $14.50

    $32.50

    $72.50

    Royal Flush 5 gal Sticky 8 oz Sticky 16 oz
    Royal Flush 5 galSticky 8 ozSticky 16 oz

    Salt leeching flushing solution for healthier plants and a better finished product.

    Increases effectiveness of foliar sprays.

    Increases effectiveness of foliar sprays.

    $135.00

    $11.10

    $18.50

    Sticky 32 oz Sticky 1/2 gal Structural Integrity 16 oz
    Sticky 32 ozSticky 1/2 galStructural Integrity 16 oz

    Increases effectiveness of foliar sprays.

    Increases effectiveness of foliar sprays.

    Silica additive for increased plant strength and hardiness against pests and diseases.

    $30.00

    $51.00

    $13.00

    Structural Integrity 32 oz Structural Integrity Gal Structural Integrity 2.5 Gal
    Structural Integrity 32 ozStructural Integrity GalStructural Integrity 2.5 Gal

    Silica additive for increased plant strength and hardiness against pests and diseases.

    Silica additive for increased plant strength and hardiness against pests and diseases.

    Silica additive for increased plant strength and hardiness against pests and diseases.

    $24.00

    $85.08

    $195.00

    Verde 16 oz. Verde 32 oz. Verde 1 gal
    Verde 16 oz.Verde 32 oz.Verde 1 gal

    Massive nitrogen boost, not recommended for recirculating systems.

    Massive nitrogen boost, not recommended for recirculating systems.

    Massive nitrogen boost, not recommended for recirculating systems.

    $12.92

    $22.50

    $80.00

    Verde 2.5 gal. Verde 5 gal. Verde 15 gal
    Verde 2.5 gal.Verde 5 gal.Verde 15 gal

    Massive nitrogen boost, not recommended for recirculating systems.

    Massive nitrogen boost, not recommended for recirculating systems.

    Massive nitrogen boost, not recommended for recirculating systems.

    $190.00

    $359.95

    $323.99

    $999.95

    $889.99

    Verde 55 gal White Widow 1 oz. White Widow 2 oz
    Verde 55 galWhite Widow 1 oz.White Widow 2 oz

    Massive nitrogen boost, not recommended for recirculating systems.

    Mycorrhizal inoculant, increases root surface area and nutrient uptake by the plant.

    Mycorrhizal inoculant, increases root surface area and nutrient uptake by the plant.

    $3,119.95

    $2,799.99

    This item ships freight.

    $18.11

    $31.50

    White Widow 4 oz. White Widow 8 oz. White Widow 1 lb
    White Widow 4 oz.White Widow 8 oz.White Widow 1 lb

    Mycorrhizal inoculant, increases root surface area and nutrient uptake by the plant.

    Mycorrhizal inoculant, increases root surface area and nutrient uptake by the plant.

    Mycorrhizal inoculant, increases root surface area and nutrient uptake by the plant.

    $54.60

    $97.50

    $185.26

    1 - 153 of 153 items