General Hydroponics FloraBloom 3-Part Hydroponic Nutrient

General Hydroponics FloraBloom

Flowering plants demand precise phosphorus and potassium ratios that shift throughout bloom development—ratios impossible to achieve with static single-bottle formulas. FloraBloom delivers 0-5-4 NPK as the flowering component of the legendary FloraSeries 3-part system, providing the phosphorus-heavy nutrition that drives flower initiation, development, and ripening when combined with General Hydroponics FloraGro Nutrients and General Hydroponics FloraMicro Nutrients in customizable ratios.

This isn't a standalone bloom booster. FloraBloom is the essential third component of the FloraSeries system that's been the hydroponic industry standard since 1976. The zero-nitrogen, high-phosphorus formula allows you to manipulate N-P-K ratios throughout flowering by adjusting the proportions of all three parts. Early flowering requires balanced nutrition, mid-flowering needs phosphorus-heavy feeding, and late flowering benefits from potassium dominance. For those seeking an extra boost in the final weeks, adding General Hydroponics Liquid KoolBloom Nutrients can significantly enhance flower weight and essential oil production.

For over 40 years, FloraBloom has proven itself across every growing method—hydroponics, coco, soil, rockwool, and water culture. When mixed with FloraMicro (providing calcium and micronutrients) and FloraGro (supplying nitrogen), you create complete, customizable nutrition. To support these metabolic processes, many growers integrate supplements like General Hydroponics RapidStart Nutrients for root vitality or General Hydroponics CALiMAGic Nutrients to prevent common deficiencies in coco-based or RO water setups.

Features

🌸

Flowering-Optimized Formula

0-5-4 NPK ratio delivers phosphorus and potassium without nitrogen for bloom control

⚙️

3-Part System Component

Combines with FloraGro and FloraMicro for customizable complete nutrition

🎯

Ratio Flexibility

Adjust proportions with Grow and Micro to dial in strain-specific nutrition

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Magnesium Enhanced

1.5% magnesium supports photosynthesis and essential oil production during flowering

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Universal Media Compatible

Works across hydroponics, soil, coco, rockwool, and all soilless systems

🏆

40+ Years Proven

Industry-standard 3-part system trusted since 1976 by professionals worldwide

What's Included

1x bottle of FloraBloom (size varies by selection)

Specifications

Specification	Value
Total Nitrogen (N)	0%
Available Phosphate (P₂O₅)	5.0%
Soluble Potash (K₂O)	4.0%
Magnesium (Mg)	1.5%
Sulfur (S)	1.0%
Derived From	Magnesium Carbonate, Magnesium Phosphate, Magnesium Sulfate, Phosphoric Acid, Potassium Carbonate, Potassium Phosphate, Potassium Sulfate
Available Sizes	1 Quart, 1 Gallon, 2.5 Gallon, 6 Gallon
Compatible Crops	Hemp, Cannabis, Vegetables, Herbs, Fruits, Flowers, All High-Value Crops
Compatible Media	Hydroponics, Rockwool, Coco, Peat-lite Mix, Potting Mix, In-ground Soil, Water Culture

Support & Manuals

📄FloraSeries Feed Chart (10-Part System)📄FloraSeries Feed Chart (6-Part System)📄FloraSeries Feed Chart (3-Part System)📄Product Label

FAQ

Can I use FloraBloom by itself without FloraGro and FloraMicro?+

No, FloraBloom is designed as one component of the complete FloraSeries 3-part system. It provides phosphorus, potassium, magnesium, and sulfur but lacks nitrogen, calcium, and micronutrients essential for plant health. You must use it in combination with FloraMicro and FloraGro in the ratios specified in the feed charts to deliver balanced, complete nutrition.

How do I adjust FloraBloom ratios throughout the flowering phase?+

Increase FloraBloom proportions as flowering progresses. Early flowering (weeks 1-2) uses moderate FloraBloom with higher FloraGro for stretch support. Mid-flowering (weeks 3-5) increases FloraBloom while reducing FloraGro as flower development accelerates. Late flowering (weeks 6+) maximizes FloraBloom with minimal FloraGro to prioritize ripening over vegetative growth. The feed charts provide specific ml-per-gallon ratios for each stage.

Why does FloraBloom have zero nitrogen?+

The zero-nitrogen formulation gives you precise control over nitrogen levels throughout flowering by adjusting FloraGro ratios. Early flowering needs more nitrogen for stretch and flower initiation, while late flowering benefits from reduced nitrogen to trigger natural senescence and enhance quality. If FloraBloom contained nitrogen, you couldn't reduce it during finishing without also reducing essential phosphorus and potassium.

What's the difference between FloraSeries and FloraNova Bloom?+

FloraSeries (FloraBloom, FloraGro, FloraMicro) is a three-part system offering maximum customization through adjustable ratios, while General Hydroponics FloraNova Bloom Nutrients is a complete one-part formula with fixed ratios. FloraSeries provides more control for experienced growers who want to fine-tune nutrition, whereas General Hydroponics FloraNova Grow Nutrients and its Bloom counterpart offer simplicity for those who prefer convenience.

Do I need to buy all three FloraSeries bottles in the same size?+

Not necessarily, but it's recommended. During flowering, you'll typically use more FloraBloom and FloraMicro than FloraGro since nitrogen requirements decrease. Some growers buy FloraBloom and FloraMicro in larger sizes and FloraGro in smaller sizes to match consumption rates. However, buying matching sizes initially is safest—you can adjust on subsequent purchases once you understand your specific usage patterns.

Can I use FloraBloom with other nutrient brands?+

While technically possible, mixing brands isn't recommended. FloraSeries is formulated as a complete system with each part balanced to work together. Substituting components with other brands creates unpredictable nutrient ratios. Ensure you maintain a stable environment by using General Hydroponics Liquid pH Down Nutrients to keep your solution within the ideal range for absorption.

How does FloraBloom support essential oil and terpene production?+

FloraBloom's phosphorus drives metabolic processes that produce secondary metabolites, while potassium regulates stomatal function and nutrient transport. When combined with proper lighting and terpene enhancers like General Hydroponics Terpinator Nutrients, FloraBloom provides the nutritional foundation for maximum aroma and potency.

Should I continue using FloraBloom all the way to harvest?+

Most growers continue using the complete FloraSeries system (including FloraBloom) until the final 1-2 weeks before harvest, then either flush with plain water or use FloraKleen to mobilize accumulated salts. Some growers gradually reduce all three parts during the final week rather than abrupt flushing. The feed charts provide finishing recommendations, but monitor trichome development and plant fade to determine optimal harvest timing rather than following rigid schedules.

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General Hydroponics FloraBloom Nutrients