Humboldt Conventional 3-Part 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.

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Humboldt Nutrients Grow 32 oz. Humboldt Nutrients Grow 1 gal. Humboldt Nutrients Grow 2.5 gal.
Humboldt Nutrients Grow 32 oz.Humboldt Nutrients Grow 1 gal.Humboldt Nutrients Grow 2.5 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.

$12.28

$11.99

$31.35

$29.99

$68.82

$61.99

Humboldt Nutrients Micro 32 oz. Humboldt Nutrients Micro 1 gal. Humboldt Nutrients Micro 2.5 gal.
Humboldt Nutrients Micro 32 oz.Humboldt Nutrients Micro 1 gal.Humboldt Nutrients Micro 2.5 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.

$16.60

$15.49

$38.12

$35.49

$87.24

$78.99

Humboldt Nutrients Micro 5 gal. Humboldt Nutrients Micro 15 gal Humboldt Nutrients Bloom 32 oz.
Humboldt Nutrients Micro 5 gal.Humboldt Nutrients Micro 15 galHumboldt Nutrients Bloom 32 oz.

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

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

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

$167.13

$149.99

$451.27

$419.99

$12.28

$11.99

Humboldt Nutrients Bloom 1 gal Big Up Powder 4 oz. Big Up Powder 8 oz.
Humboldt Nutrients Bloom 1 galBig Up Powder 4 oz.Big Up Powder 8 oz.

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

Humboldt's bloom booster for robust fruits and flowers.

Humboldt's bloom booster for robust fruits and flowers.

$31.35

$30.49

$18.14

$16.99

$31.51

$28.99

Big Up Powder 1 lb. Big Up Powder 5 lb. Big Up Powder 10 lb.
Big Up Powder 1 lb.Big Up Powder 5 lb.Big Up Powder 10 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.

$52.52

$47.99

$210.80

$191.99

$399.15

$356.99

Big Up Powder 20 lb. Calyx Magnum, 32 oz. Calyx Magnum, 1 gal
Big Up Powder 20 lb.Calyx Magnum, 32 oz.Calyx Magnum, 1 gal

Humboldt's bloom booster for robust fruits and flowers.

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.

$727.95

$649.99

$19.51

$17.49

$48.50

$44.99

Ginormous 1 gal. Ginormous 2.5 gal. Ginormous 5 gal.
Ginormous 1 gal.Ginormous 2.5 gal.Ginormous 5 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.

$104.95

$93.99

$226.60

$212.99

$409.95

$359.99

FlavorFul 32 oz. FlavorFul 1 gal. FlavorFul 2.5 gal.
FlavorFul 32 oz.FlavorFul 1 gal.FlavorFul 2.5 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.

$18.44

$17.49

$61.45

$57.99

$141.34

$129.99

FlavorFul 5 gal. FlavorFul 15 gal. ProZyme 32 oz.
FlavorFul 5 gal.FlavorFul 15 gal.ProZyme 32 oz.

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

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

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

$245.79

$223.99

$631.80

$569.99

$42.02

$38.99

ProZyme 1 gal ProZyme 5 gal. ProZyme 15 gal
ProZyme 1 galProZyme 5 gal.ProZyme 15 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.

$147.06

$131.99

$693.26

$619.77

$2,048.28

$1,839.99

ProZyme 55 gal Humboldt Roots, 50 ml Humboldt Roots, 125 ml
ProZyme 55 galHumboldt Roots, 50 mlHumboldt Roots, 125 ml

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

Highly concentrated organic root stimulant.

Highly concentrated organic root stimulant.

$6,110.50

$5,439.99

This item ships freight.

$23.11

$21.49

$44.12

$40.99

Humboldt Roots, 250 ml Humboldt Roots, 500 ml Humboldt Roots, 1/2 gal
Humboldt Roots, 250 mlHumboldt Roots, 500 mlHumboldt Roots, 1/2 gal

Highly concentrated organic root stimulant.

Highly concentrated organic root stimulant.

Highly concentrated organic root stimulant.

$73.53

$65.99

$120.80

$107.99

$404.45

$359.99

Humboldt Roots, 1 gal White Widow 1 oz. White Widow 2 oz
Humboldt Roots, 1 galWhite Widow 1 oz.White Widow 2 oz

Highly concentrated organic root stimulant.

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

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

$735.28

$659.25

$18.84

$17.49

$32.76

$30.49

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.

$57.48

$53.49

$101.40

$90.99

$192.68

$169.99

Honey Hydro Carbs 32 oz. Honey Hydro Carbs 1 gal. Honey Hydro Carbs 5 gal.
Honey Hydro Carbs 32 oz.Honey Hydro Carbs 1 gal.Honey Hydro Carbs 5 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.

$13.80

$12.99

$46.37

$42.99

$175.47

$156.99

1 - 45 of 45 items