FoxFarm Grow Big Liquid Concentrate, 1 Gallon

SKU: FXF790300
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Sale Price$96.12

Give Your Plants The Boost They Need, Growing Thick Stocks, Lush Leaves, & Sturdy Branches, Preparing Your Plant For Giant Blooms & Buds


Get your garden going with Grow Big®, Fox Farm's fast-acting, water-soluble fertilizer for lush, vegetative, compact growth.

Use Grow Big® early in the season when young plants need an extra boost. We add earthworm castings and Norwegian kelp into this special brew to encourage sturdier, healthier stems and leaves, but we also provide enough nutrients and trace minerals to create the kind of healthy branching that you’ll need later in the season for more abundant buds and blooms.

Garden Tip: Allow new plantings a few days to settle in, then begin using at the rate of two teaspoons per gallon of water every other time you water.


How To Use:

Begin application within two weeks of sprouting or transplanting. Give plants a jump start with foliar feeding. When plants have reached their peak of vegetative growth and are starting to show first signs of flowering, switch to one of FoxFarm’s blooming fertilizers. For best results refer to one of our Feeding Schedules.

GENERAL FEEDING:

  • 2-3 teaspoons (10-15 mL) per gallon (4 L) of water every other watering.

HEAVY FEEDING:

  • 4 teaspoons (20 mL) per gallon (4 L) of water every other watering.

FOLIAR FEEDING:

  • 1/2 teaspoon (2.5 mL) per gallon (4 L).
  • Use a pump sprayer and apply to both sides of leaves.
  • Do not apply while plants are in direct light.

HOSE END SPRAYER:

  • Fill sprayer with concentrate, do not dilute.
  • Follow manufacturer’s instructions for recommended application rates.

Available Sizes: Pint / Quart / Gallon / 2.5 Gallon / 5 Gallon / 15 Gallon / 55 Gallon / 250 Gallon

Brand Fox Farm
SKU FX14007
Weight (lb.) 9.7000
Height (in.)
Width (in.)
Length (in.)
Hazardous Material false
UPC 752289790300
Lead Time 2-3
N-P-K 6 - 4 - 4
Nutrient Application Hydroponic and Soil Nutrient
Nutrient Type Organic Based
OMRI Certified No
Nutrient Material Type ["Liquid"]

What does FoxFarm Grow Big Liquid Concentrate do for plants during the vegetative stage?

FoxFarm Grow Big Liquid Concentrate is a fast-acting, water-soluble fertilizer formulated to promote lush vegetative growth, thicker stems, and healthier leaves during the early and mid-season growth phase. The formula includes earthworm castings and Norwegian kelp to encourage sturdy branching, which prepares plants for more abundant buds and blooms later in the season.

When should growers start using FoxFarm Grow Big, and when should they stop?

Growers should begin applying FoxFarm Grow Big within two weeks of sprouting or transplanting, allowing new plantings a few days to settle in first. Once plants have reached peak vegetative growth and show the first signs of flowering, growers should switch to a FoxFarm blooming fertilizer rather than continuing with Grow Big.

What are the dilution rates for FoxFarm Grow Big Liquid Concentrate?

FoxFarm Grow Big offers three dilution options depending on feeding method. For general feeding, mix 2 to 3 teaspoons (10 to 15 mL) per gallon of water every other watering. For heavy feeding, use 4 teaspoons (20 mL) per gallon every other watering. For foliar feeding, dilute to 1/2 teaspoon (2.5 mL) per gallon, apply with a pump sprayer to both sides of leaves, and avoid applying while plants are in direct light.

Is FoxFarm Grow Big compatible with hydroponic systems as well as soil gardens?

Yes, FoxFarm Grow Big Liquid Concentrate is suitable for both hydroponic and soil applications, making the fertilizer a versatile choice for growers using different growing media.

What is the N-P-K ratio of FoxFarm Grow Big Liquid Concentrate, and is the formula organic?

FoxFarm Grow Big Liquid Concentrate carries an N-P-K ratio of 6-4-4, delivering a nitrogen-forward profile suited to vegetative growth. The formula is organic-based, though it is not OMRI certified.

Can FoxFarm Grow Big Liquid Concentrate be applied through a hose-end sprayer?

Yes, FoxFarm Grow Big can be used with a hose-end sprayer by filling the sprayer with the undiluted concentrate and following the sprayer manufacturer's recommended application rates, so no additional dilution is needed before loading the sprayer.

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