Foxfarm Grow Big Hydroponic 3-2-6 1 Pint
Best liquid nutrient for hydroponic gardeners seeking vigorous vegetative growth.
Boost your hydroponic garden's vegetative stage with FoxFarm Grow Big Hydroponic Nutrient. This specialized liquid formula, featuring an NPK ratio of 3-2-6, is packed with earthworm castings and essential micronutrients to promote vigorous growth, enhance plant size, and improve structure. Designed for hydroponic systems, it ensures comprehensive feeding for abundant development. Maintain optimal pH levels between 5.8 and 6.3 for peak nutrient uptake. Transition to flowering-specific nutrients when plants show the first signs of bloom for a successful harvest.
$18.99
Owner Satisfaction
4.7
/ 5
Category Rank
50
/ 4348
#50 in Fertilizers
Price vs Category Average
-69%
Below average
NPK Ratio
326
/ --
Who it's for
- Hydroponic growers needing essential minerals for optimal plant health
- Indoor gardeners seeking vigorous stem and foliage development
- FoxFarm users wanting a streamlined, consistent feeding schedule
Who should skip it
- Novice growers prone to overfeeding or inconsistent dosing
- Organic purists maintaining living soil or microbial ecosystems
- Busy gardeners unable to perform regular reservoir pH adjustments
Performance breakdown
Vegetative Growth Support
High potassium levels drive rapid, robust structural development during early stages.
Hydroponic Compatibility
Formulated specifically to prevent clogging and ensure seamless nutrient delivery.
Nutrient Bioavailability
Quick-release synthetic formula ensures plants access essential minerals almost immediately.
Ease of Application
Liquid concentrate format makes precise dosing simple for any skill level.
Micronutrient Density
Earthworm castings provide a rich, organic boost to standard synthetic feeding.
pH Stability
Maintains consistent nutrient uptake when kept within the recommended range.
Key Specs
NPK Ratio
3-2-6
Recommended pH Range
5.8 to 6.3
Fertilizer Type
Hydroponic Nutrient
Fertilizer Form
Liquid Concentrate
Nitrogen Percentage
3%
Phosphorus Percentage
2%
Potassium Percentage
6%
Application Method
Foliar Spray, Soil Drench
Features
- Promotes vigorous vegetative growth
- Enhances plant size and structure
- Contains earthworm castings and micronutrients
- Optimized for hydroponic systems
- Supports abundant fruit and flower development
- Easy to use liquid concentrate
- Maintains optimal pH range
- Provides clear feeding instructions
What customers say
Growers consistently praise the exceptional quality and effectiveness of Foxfarm Grow Big. The primary sentiment highlights its ability to deliver rapid, vigorous growth and deep green foliage across various hydroponic setups. Consumers appreciate the straightforward liquid formulation, which simplifies nutrient mixing and application, making it highly accessible. This product is viewed as a reliable foundation for successful hydroponic gardening, justifying its cost through dependable, high performance results.
Know before you buy
While this formula is specifically optimized for hydroponic systems, it can be used as a soil drench or foliar spray for soil-grown plants. If using in soil, be sure to monitor your nutrient concentration carefully, as hydroponic formulas are often more potent.
To ensure your plants can effectively absorb the nutrients, maintain your reservoir or water solution between a pH of 5.8 and 6.3.
You should transition to a flowering-specific nutrient as soon as you see the first signs of blooms or buds. Grow Big is designed primarily for the vegetative stage, so switching early ensures your plants have the right nutrients for flower development.
Keep the bottle in a cool, dark place away from direct sunlight. It is important to prevent the liquid from freezing, as extreme temperatures can degrade the quality of the nutrients.
Yes, the 3-2-6 NPK ratio is versatile enough to support vigorous vegetative growth for both edible vegetables and ornamental houseplants.
Still have a question?
Ask Hayley anything about this product before you decide.