Master Premium 2-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.

1 - 43 of 43 items
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Master-A, 32 oz. Master-A, 1 gal. Master-A, 2.5 gal.
Master-A, 32 oz.Master-A, 1 gal.Master-A, 2.5 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.

$24.58

$22.89

$73.73

$65.99

$153.60

$137.99

Master-A, 5 gal. Master-B, 32 oz. Master-B, 1 gal.
Master-A, 5 gal.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.

$270.38

$248.99

$24.58

$22.89

$73.73

$66.99

Master-B, 2.5 gal. Master-B, 5 gal. Big Up Powder 4 oz.
Master-B, 2.5 gal.Master-B, 5 gal.Big Up Powder 4 oz.

Humboldt's advanced grower 2 part nutrient solution.

Humboldt's advanced grower 2 part nutrient solution.

Humboldt's bloom booster for robust fruits and flowers.

$153.60

$137.99

$270.38

$248.99

$18.14

$16.99

Big Up Powder 8 oz. Big Up Powder 1 lb. Big Up Powder 5 lb.
Big Up Powder 8 oz.Big Up Powder 1 lb.Big Up Powder 5 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.

$31.51

$28.99

$52.52

$47.99

$210.80

$191.99

Big Up Powder 10 lb. Big Up Powder 20 lb. Calyx Magnum, 32 oz.
Big Up Powder 10 lb.Big Up Powder 20 lb.Calyx Magnum, 32 oz.

Humboldt's bloom booster for robust fruits and flowers.

Humboldt's bloom booster for robust fruits and flowers.

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

$399.15

$356.99

$727.95

$649.99

$19.51

$17.49

Calyx Magnum, 1 gal Ginormous 1 gal. Ginormous 2.5 gal.
Calyx Magnum, 1 galGinormous 1 gal.Ginormous 2.5 gal.

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

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.

$48.50

$44.99

$104.95

$93.99

$226.60

$212.99

Ginormous 5 gal. FlavorFul 32 oz. FlavorFul 1 gal.
Ginormous 5 gal.FlavorFul 32 oz.FlavorFul 1 gal.

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

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

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

$409.95

$359.99

$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

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.

$42.02

$38.99

$147.06

$131.99

$693.26

$619.77

ProZyme 15 gal ProZyme 55 gal Humboldt Roots, 50 ml
ProZyme 15 galProZyme 55 galHumboldt Roots, 50 ml

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

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

Highly concentrated organic root stimulant.

$2,048.28

$1,839.99

$6,110.50

$5,439.99

This item ships freight.

$23.11

$21.49

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.

$44.12

$40.99

$73.53

$65.99

$120.80

$107.99

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

Highly concentrated organic root stimulant.

Highly concentrated organic root stimulant.

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

$404.45

$359.99

$735.28

$659.25

$18.84

$17.49

White Widow 2 oz White Widow 4 oz. White Widow 8 oz.
White Widow 2 ozWhite Widow 4 oz.White Widow 8 oz.

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.

$32.76

$30.49

$57.48

$53.49

$101.40

$90.99

White Widow 1 lb Honey Hydro Carbs 32 oz. Honey Hydro Carbs 1 gal.
White Widow 1 lbHoney Hydro Carbs 32 oz.Honey Hydro Carbs 1 gal.

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

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

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

$192.68

$169.99

$13.80

$12.99

$46.37

$42.99

Honey Hydro Carbs 5 gal.
Honey Hydro Carbs 5 gal.

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

$175.47

$156.99

1 - 43 of 43 items