General Hydroponics FloraMicro 3-Part Hydroponic Nutrient

General Hydroponics FloraMicro

Micronutrient deficiencies sabotage yields long before most growers notice yellowing leaves or stunted growth. FloraMicro delivers a complete chelated micronutrient package with 5% nitrogen, 1% potassium, and 5% calcium—the foundation of the legendary FloraSeries 3-part system that's been the hydroponic industry standard since 1976.

This isn't a standalone product. FloraMicro is the essential building block of the FloraSeries system, providing trace elements and calcium that General Hydroponics FloraGro Nutrients and General Hydroponics FloraBloom Nutrients lack. The chelated iron, manganese, copper, zinc, cobalt, and molybdenum remain plant-available across pH ranges from 5.0 to 7.5, preventing the lockout that plagues inferior micronutrient supplements. Combined with FloraGro and FloraBloom in varying ratios, FloraMicro allows you to customize nutrition for every growth stage—from aggressive vegetative growth to heavy flowering—across hydroponics, soil, and soilless media.

For over 40 years, FloraSeries has proven itself in operations from hobbyist tents to commercial greenhouses. The 3-part system gives you complete control over N-P-K ratios and micronutrient delivery, allowing you to dial in custom feeding programs for specific cultivars or adjust mid-cycle with General Hydroponics CALiMAGic Nutrients when plants show unexpected responses. FloraMicro's precisely balanced formula eliminates the deficiencies and toxicities that come from guesswork nutrition, delivering consistent results batch after batch.

Features

🔬

Complete Micronutrient Package

Chelated iron, manganese, copper, zinc, cobalt, and molybdenum for full-spectrum nutrition

🦴

5% Calcium Foundation

Essential calcium for cell wall strength and nutrient transport throughout growth

⚙️

3-Part System Building Block

Combines with FloraGro and FloraBloom for complete customizable nutrition

🔗

Chelated for pH Stability

EDTA chelation ensures micronutrient availability across variable pH conditions

🌱

Universal Media Compatible

Works in hydroponics, soil, coco, rockwool, and all soilless growing systems

🏆

40+ Years Proven

Industry-standard 3-part system trusted since 1976 by hobbyists and professionals

What's Included

1x bottle of FloraMicro (size varies by selection)

Specifications

Specification	Value
Total Nitrogen (N)	5.0%
Ammoniacal Nitrogen	0.3%
Nitrate Nitrogen	4.7%
Soluble Potash (K₂O)	1.0%
Calcium (Ca)	5.0%
Boron (B)	0.01%
Cobalt (Co)	0.0005%
Copper (Cu) - Chelated	0.01%
Iron (Fe) - Chelated	0.1%
Manganese (Mn) - Chelated	0.05%
Molybdenum (Mo)	0.0008%
Zinc (Zn) - Chelated	0.015%
Derived From	Ammonium Molybdate, Ammonium Nitrate, Calcium Carbonate, Calcium Nitrate, Cobalt Nitrate, Copper EDTA, Iron DTPA, Iron EDDHA, Iron EDTA, Manganese EDTA, Potassium Borate, Potassium Nitrate, Urea, Zinc EDTA
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 FloraMicro by itself without FloraGro and FloraBloom?+

No, FloraMicro is designed to work as part of the complete FloraSeries 3-part system. While it provides essential micronutrients and calcium, it lacks adequate nitrogen, phosphorus, and potassium for complete plant nutrition. You must use it in combination with General Hydroponics FloraGro Nutrients and General Hydroponics FloraBloom Nutrients in the ratios specified in the feed charts to deliver balanced nutrition throughout the plant lifecycle.

How do I adjust FloraSeries ratios for different growth stages?+

The beauty of the 3-part system is customization. During vegetative growth, use higher ratios of FloraGro and FloraMicro with less FloraBloom. As plants transition to flowering, reduce FloraGro and increase FloraBloom while maintaining FloraMicro for micronutrients and calcium. Download the appropriate feed chart (3-part, 6-part, or 10-part system) for specific mixing ratios tailored to your growing method and crop type.

What's the difference between the 3-part, 6-part, and 10-part systems?+

The 3-part system uses just FloraGro, FloraBloom, and FloraMicro for complete nutrition. The 6-part system adds supplements like General Hydroponics CALiMAGic Nutrients and General Hydroponics Liquid KoolBloom Nutrients for enhanced performance. The 10-part system includes the full General Hydroponics lineup with additional boosters and additives. All three use FloraMicro as the micronutrient foundation—choose the system complexity that matches your experience level and performance goals.

Why does FloraMicro contain nitrogen if it's a micronutrient product?+

The 5% nitrogen comes from calcium nitrate and other nitrogen sources used to deliver the calcium and trace elements. This nitrogen is factored into the FloraSeries feed charts, so when you follow the recommended ratios of all three parts, you get the correct total nitrogen levels for each growth stage. The dual benefit is providing both essential nitrogen and micronutrients in one product.

Do I need to pH adjust after mixing FloraSeries nutrients?+

Yes, always check and adjust pH after mixing your nutrient solution. FloraSeries will affect your water's pH, so using General Hydroponics Liquid pH Down Nutrients or the corresponding pH Up formula is necessary to keep the chelated micronutrients in FloraMicro plant-available. The chelation helps maintain micronutrient availability across variable ranges, but you'll still get optimal results by keeping pH in the sweet spot for your growing medium.

Can I use FloraSeries in organic growing systems?+

No, FloraSeries including FloraMicro is a synthetic nutrient system and is not certified for organic production. However, it works exceptionally well in conventional hydroponics, soilless systems, and standard soil growing. If you need organic-certified nutrients, consider General Organics products instead, though FloraSeries remains the gold standard for growers prioritizing consistency and precision over organic certification.

How long does FloraMicro last once opened?+

When stored properly in a cool, dark place with the cap tightly sealed, FloraMicro maintains its potency for years. The liquid concentrate is shelf-stable, though you may notice some settling of minerals over time—shake well before use. Avoid temperature extremes and direct sunlight. If you see unusual color changes or precipitation that doesn't remix with shaking, the product may have degraded and should be replaced.

What size bottle should I buy for my grow?+

Calculate based on your reservoir size and feeding schedule. A 1-quart bottle works for small hobbyist setups (1-4 plants), 1-gallon serves medium grows (5-15 plants), 2.5-gallon suits larger operations (15-40 plants), and 6-gallon is for commercial or very large grows (40+ plants). Since you'll use FloraMicro throughout the entire crop cycle in combination with FloraGro and FloraBloom, buy all three products in matching sizes to avoid running out mid-grow.

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