Build Your Nutrient Strategy Around Proven Science
General Hydroponics doesn't just sell nutrients—they engineer complete feeding programs backed by decades of commercial cultivation data. The modular approach lets growers scale complexity to match their experience: start with the 3-part FloraSeries foundation, add targeted supplements as skills advance, or jump straight to commercial-grade FloraPro powders for large-scale operations.
Why General Hydroponics Dominates Professional Growing
The FloraSeries 3-part system solves the fundamental problem plaguing fixed-ratio nutrients: plants don't need the same NPK balance during explosive vegetative growth as they do during flowering. General Hydroponics recognized this in 1976 and built a system that adapts.
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Customizable NPK Ratios: The
FloraGro,
FloraBloom, and
FloraMicro trio delivers complete nutrition through adjustable mixing ratios—seedlings get gentle feeding, vegetative plants receive nitrogen-heavy growth formulas, and flowering crops transition to phosphorus-dominant bloom nutrition without switching product lines.
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Media-Agnostic Performance: Whether running deep water culture, drain-to-waste coco, recirculating systems, or traditional soil beds, General Hydroponics formulas maintain pH stability and prevent lockout across every growing method—the calcium-to-magnesium balance in
CALiMAGic prevents the deficiencies that cripple fast-growing crops in inert media.
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Supplement Integration: Start basic or go advanced. The core 3-part system works standalone, but targeted additives like
Liquid KoolBloom for flowering acceleration,
Armor Si for cell-wall fortification, or
RapidStart for explosive root development let you fine-tune performance as cultivation expertise grows.
Matching Systems to Scale and Skill Level
General Hydroponics serves everyone from first-time growers to commercial operations processing thousands of plants. The key is selecting the right complexity tier for your operation.
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Beginner-Friendly Simplicity: New growers benefit from the
FloraNova Grow and
FloraNova Bloom one-part formulas—concentrated liquid nutrients that eliminate multi-bottle confusion while delivering complete nutrition through separate vegetative and flowering bottles, ideal for 4x4 tent operations or closet grows.
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Advanced Control for Experienced Cultivators: The full FloraSeries with supplements unlocks precision feeding schedules—adjust nitrogen ratios weekly as plants transition from vegetative to pre-flower, spike phosphorus during peak bloom with
Dry KoolBloom, and enhance terpene production using
Terpinator during the final ripening phase.
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Commercial Operations Need Commercial Solutions: Large facilities running hundreds of gallons weekly save substantially by switching to the FloraPro powder series—FloraPro Grow,
FloraPro Bloom, and
FloraPro Calcium + Micros in 25lb bags deliver the same proven ratios at commercial scale with dramatically reduced freight costs and storage requirements.
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Don't Forget pH Management: Nutrient uptake collapses outside the 5.5-6.5 pH range. General Hydroponics
pH Down and
pH Up solutions integrate seamlessly with all nutrient programs, preventing the lockout issues that waste expensive feeding schedules—commercial growers running 250+ gallon reservoirs should stock the 6-gallon
Pro pH Down to avoid constant reordering.
Maximizing Results Through Strategic Feeding
General Hydroponics formulas perform best when integrated into a complete feeding strategy rather than used in isolation. Apply these principles to extract maximum performance.
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Match Feed Strength to Growth Stages: Seedlings thrive on 400-600 PPM, vegetative plants demand 800-1200 PPM, and flowering crops perform best between 1000-1400 PPM—use the adjustable FloraSeries ratios to hit these targets precisely rather than diluting fixed formulas and creating nutrient imbalances.
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Layer Supplements Strategically: Start with the base 3-part system for the first grow to establish performance baselines, then introduce one supplement at a time (CALiMAGic first for deficiency prevention, then root enhancers, finally bloom boosters) so you can measure each additive's actual impact on yield and quality rather than guessing which product drove results.
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Monitor and Adjust Weekly: EC and pH drift signals when plants are actively feeding versus sitting idle—if reservoir EC drops while pH rises, plants are consuming nutrients faster than water (increase concentration); if EC rises while pH drops, you're overfeeding (reduce strength or increase solution changes).
Looking to explore nutrient strategies beyond General Hydroponics? Browse the complete
Nutrients and Supplements section to compare alternative feeding programs from brands like Botanicare, NPK Raw, and X Nutrients.
Frequently Asked Questions
What's the difference between the FloraSeries 3-part system and FloraNova one-part nutrients?
The FloraSeries (FloraGro, FloraBloom, FloraMicro) provides complete customization through adjustable mixing ratios—you control exact NPK balance throughout every growth stage by changing how much of each bottle you add. FloraNova (separate Grow and Bloom bottles) simplifies feeding with fixed ratios optimized for vegetative or flowering phases, trading customization for convenience. Choose FloraSeries if you want precision control over nutrient ratios, or FloraNova if you prefer straightforward one-bottle-per-stage feeding. Both deliver complete nutrition; the difference is control versus simplicity.
Do I really need CALiMAGic if I'm already using the complete FloraSeries?
It depends on your water source and growing media. RO water users and coco growers almost always need supplemental calcium and magnesium because RO removes these minerals and coco naturally binds calcium. Tap water growers in regions with hard water (150+ PPM) can often skip it. Watch for deficiency symptoms: rust spots on leaves, yellowing between veins, or slow growth signal calcium-magnesium deficiency even with complete base nutrients. CALiMAGic prevents these issues before they impact yields, particularly critical during rapid vegetative growth when demand spikes.
When should I switch from Liquid KoolBloom to Dry KoolBloom during flowering?
Use Liquid KoolBloom (0-10-10) during early-to-mid flowering to accelerate flower development and increase flower sites—typically weeks 1-5 of an 8-week bloom cycle. Switch to Dry KoolBloom during the final 2-3 weeks to drive ripening and essential oil production through its concentrated 2-45-28 formulation. The Liquid version builds flower structure; the Dry version finishes and hardens flowers while enhancing aroma. Don't run them simultaneously—Dry KoolBloom's extreme phosphorus levels can lock out other nutrients if combined with Liquid KoolBloom.
Can I mix General Hydroponics nutrients with other brands' supplements?
Yes, General Hydroponics formulas work with most third-party supplements, but verify compatibility before mixing. The FloraSeries is designed to integrate with additives—many growers successfully combine it with enzymatic cleaners, beneficial bacteria, or specialized bloom enhancers from other manufacturers. However, avoid mixing with incompatible calcium or sulfate sources that can cause precipitation. Always add nutrients to water in the correct order (base nutrients first, then supplements), never mix concentrates directly, and monitor pH after adding each component since some additives dramatically shift solution pH.
What's the benefit of Armor Si silica supplement for plant growth?
Armor Si strengthens cell walls through silica supplementation, creating thicker stems that support heavier flower loads without staking while improving drought resistance and heat tolerance. Plants supplemented with silica show increased resistance to pests and diseases because stronger cell walls create physical barriers to penetration. The 0-0-4 formula also provides potassium without nitrogen, making it valuable during flowering. Add Armor Si first to plain water before other nutrients since its high pH (11+) helps buffer against pH crashes as you add acidic base nutrients—this prevents the pH rollercoaster that stresses plants.
How do I prevent pH drift when using General Hydroponics in hydroponic systems?
pH drift comes from plant nutrient uptake changing solution chemistry—as plants consume specific ions, pH shifts up or down. Maintain stability by changing nutrient solution every 7-14 days rather than just topping off with water, which concentrates unconsumed elements. Use both pH Up and pH Down to make small adjustments (0.2-0.3 pH units at a time) rather than large swings that shock plants. FloraSeries includes pH buffers that resist drift better than unbuffered nutrients, but recirculating systems still need daily monitoring. If pH swings wildly within 24 hours despite adjustments, you're likely overfeeding—reduce nutrient concentration and drift will stabilize.
Should commercial growers use FloraPro powders instead of liquid FloraSeries?
Operations mixing 50+ gallons weekly benefit significantly from FloraPro powders. A single 25lb bag of FloraPro Bloom replaces approximately 75 gallons of liquid FloraBloom, dramatically reducing freight costs, storage space, and per-gallon feeding expenses. The powder formulations deliver identical nutrient ratios to their liquid counterparts but require accurate scales and proper mixing procedures—undissolved powder clogs drip lines and creates nutrient imbalances. Small-scale growers (under 20 plants) usually find liquid concentrates more convenient despite higher per-gallon costs because they eliminate mixing errors and store indefinitely without caking.
What does Terpinator actually do, and is it worth the cost?
Terpinator increases terpene production and intensifies aroma profiles through a potassium-based formula (0-0-4) that enhances essential oil synthesis during flowering. Results vary by genetics—some cultivars show dramatic aroma improvements while others respond minimally, making strain testing essential before committing to full-scale use. Cost-effectiveness depends on your market: if premium pricing rewards superior aroma (craft cannabis, specialty herbs), Terpinator's expense justifies itself through higher product value. Commodity production focused purely on yield may not see sufficient ROI. Use during weeks 3-7 of flowering for best results, and combine with proper environmental controls (60-65°F nighttime temps) that naturally preserve terpenes.
