Grow Green 4-2-6 Concentrate – Complete Vegetative N‑P‑K
- Regular Price
- $ 27.99
- Sale Price
- $ 27.99
- Regular Price
- $ 27.99
- Unit Price
- per
Grow Green 4-2-6
Premium vegetative growth formula for our complete 4-part hydroponic system. This macro-rich concentrate delivers higher potassium than typical liquid "grow" formulas, promoting thicker stems and denser canopy development. Powder efficiency means you pay for nutrients, not water—saving 50-70% versus liquid alternatives while reducing your carbon footprint.
Vegetative Growth Timeline
(roots developing)
(increase rates)
(maximum rates)
(taper Grow Green)
⚡ Quick Dose Guide (Late Vegetative)
Select your reservoir size for instant dosing at 15 ml/gal. Always add Cal-Mag Plus first!
FEATURES
- Optimized 4-2-6 NPK: Higher potassium than typical 2-1-6 liquid formulas for superior stem strength and canopy density
- Pure Macronutrients: Focused formula allows precise micronutrient customization with Micro Green
- 100% Water-Soluble: Dissolves instantly for all hydroponic systems—DWC, NFT, drip, aeroponics
- Heavy Metal Free: CDFA registered and third-party tested for purity
- Powder Concentrate: No sticky bottles, no water weight, indefinite shelf life when dry
- System Compatible: Safe for drip, NFT, DWC, aeroponics, ebb & flow, and soil applications
- Professional Grade: Trusted by commercial growers worldwide since 1989
- Cost-Effective: 50-70% savings versus liquid nutrients—pay for nutrients, not water
DERIVED FROM
Potassium Nitrate • Monopotassium Phosphate • Potassium Sulfate • Magnesium Sulfate
Premium-grade mineral salts ensure rapid dissolution and maximum nutrient availability in all growing systems. Our refined ingredients provide consistent, reliable nutrition without the impurities found in lower-grade fertilizers.
PERFECT FOR THESE APPLICATIONS
COMMON PROBLEMS? WE HAVE SOLUTIONS
WHY GROWERS CHOOSE THIS FORMULA
💪 Superior Stem Strength
Higher potassium (6%) vs. typical 2-1-6 liquid grow formulas promotes thicker stems and denser canopy development.
🎯 Precision Nutrition
Pure macros let you dial in exact ratios when combined with Micro Green, Cal-Mag Plus, and Blossom Green.
💰 50-70% Cost Savings
Concentrated powder means you ship nutrients, not water. One package makes gallons of stock solution.
🌍 Reduced Carbon Footprint
90% less shipping weight than liquids. Minimal packaging waste. Sustainable choice for eco-conscious growers.
⚠️ Important Mixing Guidelines
- Never mix concentrates directly—always dilute each component in water first
- Mixing order matters: Cal-Mag → Micro → Grow → Bloom → pH adjust last
- Do not combine with nutrients from other manufacturers (causes lockout)
- Store dry powder in cool, dark location—indefinite shelf life when kept dry
- Stock solutions last 6+ months when stored properly
NPK FORMULA EXPLAINED
N-P-K: 4-2-6 Vegetative Growth Formula
Optimized for vigorous vegetative growth with double the nitrogen of typical 2-1-6 liquid formulas, plus extra potassium for stem strength.
N - 4%
Nitrogen
Double the N of typical 2-1-6 formulas. Drives chlorophyll production, amino acid synthesis, and rapid vegetative growth.
P - 2%
Phosphorus
Supports energy transfer (ATP), root development, and prepares plants for the transition to flowering.
K - 6%
Potassium
Higher K builds thicker cell walls, stronger stems, and improves water regulation and stress resistance.
APPLICATION RATES & DIRECTIONS
Grow Green 4-2-6 is designed to work as part of our complete 4-part hydroponic nutrient system. Always use with Micro Green, Cal-Mag Plus, and transition to Blossom Green during flowering.
📦 Stock Solution Preparation
| Product | Package → Water | Concentration | Shelf Life |
|---|---|---|---|
| Cal-Mag Plus 2-0-0 | 2.5 lbs → 1 gallon | 2.5 lbs/gallon | 6+ months |
| Grow Green 4-2-6 | 1.7 lbs → 1 gallon | 1.7 lbs/gallon | 6+ months |
| Micro Green 2-0-3 | 1.5 lbs → 1 gallon | 1.5 lbs/gallon | 6+ months |
| Blossom Green 2-6-8 | 1.8 lbs → 1 gallon | 1.8 lbs/gallon | 6+ months |
📦 Grow Green Package Sizes
| Package Size | Water Needed | Stock Solution Yield |
|---|---|---|
| 1.7 lbs | 1 gallon | 1 gallon concentrate |
| 3.4 lbs | 2 gallons | 2 gallons concentrate |
| 8.5 lbs | 5 gallons | 5 gallons concentrate |
| 17 lbs | 10 gallons | 10 gallons concentrate |
🌱 Complete 4-Part System Feeding Schedule (ml per gallon)
| Growth Stage | Cal-Mag Plus | Grow Green | Micro Green | Blossom Green | EC Target |
|---|---|---|---|---|---|
|
Seedlings/Clones Week 1-2 |
2.5 | 1.25 | 1.25 | 1.25 | 0.5-0.8 |
|
Early Vegetative Week 3-4 |
5 | 5 | 5 | 5 | 1.0-1.4 |
|
Late Vegetative Week 5-6 |
7.5 | 15 | 10 | 5 | 1.4-1.8 |
|
Transition Week 7-8 |
10 | 10 | 10 | 10 | 1.6-2.0 |
|
Early Bloom Week 9-10 |
10 | 5 | 10 | 15 | 1.8-2.2 |
|
Peak Bloom Week 11-13 |
10 | 0 | 10 | 20 | 2.0-2.5 |
|
Late Bloom/Flush Week 14+ |
5 | 0 | 7.5 | 15 | 1.5-2.0 |
⚠️ Critical Mixing Order
Never mix concentrates directly together!
- Cal-Mag Plus FIRST — Always add to water before other nutrients
- Micro Green SECOND — Add after Cal-Mag is fully dissolved
- Grow Green THIRD — During vegetative stage
- Blossom Green FOURTH — During flowering stage
- Adjust pH LAST — Target 5.5-6.5 after all nutrients added
💧 Application Methods
| System Type | Application Method | Special Considerations |
|---|---|---|
| DWC/RDWC | Add to reservoir | Change weekly, monitor pH daily |
| NFT/Aeroponics | Continuous feed | Filter solution, check emitters |
| Ebb & Flow | Flood cycles | Adjust concentration for frequency |
| Drip/DTW | Multiple daily feeds | 10-20% runoff recommended |
| Coco/Soilless | Daily feeding | Never let media dry completely |
- Higher K formula promotes thicker stems vs standard 2-1-6 ratios
- Reduce Grow Green gradually when transitioning to bloom
- Increase rates for fast-growing, heavy-feeding crops
- Monitor runoff EC to prevent salt buildup
GROW GREEN CALCULATOR
COMPARE WITH ALTERNATIVES
See how Greenway Biotech's powder concentrate stacks up against popular liquid nutrient systems.
| Feature | Greenway Biotech 4-Part | General Hydroponics Flora Series | Advanced Nutrients pH Perfect |
|---|---|---|---|
| Format | Concentrated Powder | Pre-mixed Liquid | Pre-mixed Liquid |
| Cost (Entry Kit) | ~$100 (makes 400+ gal) | ~$45-50 (quart trio) | ~$50-70 (liter trio) |
| Cost per Gallon | ~$0.25/gallon | ~$0.75-1.00/gallon | ~$1.00-1.50/gallon |
| Shelf Life | Indefinite (dry powder) | 1-2 years (liquid) | 1-2 years (liquid) |
| Shipping Weight | ~7 lbs (full system) | ~25+ lbs (gallon trio) | ~25+ lbs (gallon trio) |
| Heavy Metal Testing | ✅ Third-party verified | Not specified | Not specified |
| CDFA Registered | ✅ Yes | Varies by state | Varies by state |
| Separate Cal-Mag | ✅ Included in system | ❌ Extra purchase (CALiMAGic) | ❌ Extra purchase (Sensi Cal-Mag) |
| pH Buffering | Manual (precise control) | Manual | Auto pH Perfect™ |
| Environmental Impact | ✅ 90% less packaging/shipping | Heavy plastic bottles | Heavy plastic bottles |
| Made in USA | ✅ California | ✅ USA | ❌ Canada |
| Annual Savings (100 gal/week) | $2,600-3,900/year | Baseline | Higher than GH |
COMPLETE YOUR 4-PART SYSTEM
Grow Green works best as part of our complete hydroponic nutrient system—all four components ensure balanced nutrition from seed to harvest.
Cal-Mag Plus 2-0-0
Foundation of the system. Provides calcium, magnesium, and chelated iron. Always add FIRST to prevent precipitation. Critical for RO water and coco coir.
EssentialMicro Green 2-0-3
Complete 7-element micronutrient blend with chelated minerals. Use consistently throughout ALL growth stages—micronutrients are the catalysts that make macros work.
EssentialBlossom Green 2-6-8
High-phosphorus flowering formula for abundant blossoms and maximum yields. Increase as you reduce Grow Green during transition to bloom.
Save $17Complete 4-Part Bundle
Get all four products together and save! Makes 4 gallons of stock solution, treats up to 400 gallons of nutrient solution.
GROW WITH CONFIDENCE
Product Quality Guaranteed
- All products manufactured in California, USA since 1989
- Tested by independent third-party laboratories for quality assurance
- Registered with the California Department of Food and Agriculture (CDFA)
- Rigorously tested to ensure products are free from heavy metals
- Specifically formulated for hydroponic and soilless growing systems
Environmental Responsibility
- Powder format reduces shipping weight by 90% vs. liquids
- 50-70% lower carbon footprint per nutrient unit delivered
- Minimal packaging waste compared to liquid bottles
- Precise formulation reduces nutrient runoff and waste
- Supports efficient water use in hydroponic systems
Hassle-Free Return Policy
If you're not completely satisfied, we offer a 90-day money-back guarantee. Simply return the unused portion in its original packaging, and we'll process a full refund.
Charitable Contributions
1% of all profits go to our foundation, focused on improving educational opportunities for children.
FREQUENTLY ASKED QUESTIONS
Q Can Grow Green replace my liquid grow bottle?
Yes! Grow Green 4-2-6 delivers the same nutrients as premium liquid grow formulas but at 50-70% less cost per finished gallon. Match the ppm-N of your current product and you'll see equal or better results, with no heavy metals and a much smaller carbon footprint. The higher potassium ratio (6% vs typical 3%) promotes stronger stems and denser growth.
Q Do I still need a micro formula?
Yes—Grow Green provides only macronutrients (NPK). You must pair it with Micro Green 2-0-3 to supply essential trace elements like iron, manganese, zinc, copper, boron, and molybdenum. This separation allows you to customize micronutrient levels based on your water source and crop needs.
Q How does the 4-2-6 ratio compare to standard 2-1-6?
Our 4-2-6 formula contains double the nitrogen and slightly more phosphorus than typical 2-1-6 liquid grow formulas. This means you'll use less product to achieve the same nitrogen levels, further reducing costs. The enhanced ratio promotes faster vegetative growth and stronger cell development.
Q Why powder instead of liquid?
Powder nutrients offer multiple advantages: no water weight to ship (saving 50-70% on costs), indefinite shelf life when kept dry, no pH drift or precipitation in bottles, easier storage, and significantly reduced environmental impact. You're paying for pure nutrients, not water and plastic bottles.
Q Can I use this in soil?
While optimized for hydroponics, Grow Green works excellently as a soil drench when properly diluted. Use the early vegetative rate (5 ml/gal) for soil applications and water when the top inch is dry. Always test runoff EC to prevent salt buildup in containers.
Q Can I mix Grow Green with other brands?
We strongly recommend using only our 4-part system together. Mixing with other manufacturers' nutrients can cause nutrient lockout, pH instability, precipitation, and reduced effectiveness. Our products are specifically formulated to work together.
Q How long does the stock solution last?
Stock solutions stored in a cool, dark place last 6+ months. The dry powder has an indefinite shelf life when kept dry and sealed. Always shake stock solutions before use as some settling may occur.
DISCOVER MORE GROWING WISDOM
HAVE QUESTIONS?
Our hydroponic experts are here to help you succeed with personalized advice on using our 4-part system.