• Plagron Hydro A&B Set | Two-Part Liquid Hydroponic Base Nutrient
  • Plagron Hydro A&B Set | Two-Part Liquid Hydroponic Base Nutrient
  • Plagron Hydro A&B Set | Two-Part Liquid Hydroponic Base Nutrient
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Plagron Hydro A&B Set | Two-Part Liquid Hydroponic Base Nutrient

£15.00
£15.00
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size: 1ltr
Plagron Hydro A&B is a highly concentrated, premium two-part mineral base nutrient (\(A+B\)) engineered explicitly for the growth and flowering phases of plants grown in hydroponic systems. Formulated for professional and commercial applications, this balanced liquid feed delivers completely chelated, highly bioavailable primary, secondary, and trace elements. It is optimized for inert substrates such as clay pebbles (expanded clay), rockwool, and polyurethane slabs, dissolving completely sediment-free to guarantee problem-free operation in drippers, NFT systems, and run-to-waste systems.
Technical Specifications
Parameter Specification
Product Classification Two-part mineral base nutrient (\(A + B\) formulation)
Physical Form Liquid concentrate
Nutrient NPK Ratio (Hydro A) NPK: 3 - 0 - 1 (Total Nitrogen: 3.4%, Soluble Potash: 1.3%, Calcium: 4.2%)
Nutrient NPK Ratio (Hydro B) NPK: 1 - 3 - 6 (Total Nitrogen: 1.3%, Available Phosphate: 3.3%, Soluble Potash: 6.2%)
Target Growing Media Rockwool, Clay Pebbles, Perlite, Mapito, NFT, and DWC
pH Stability Range Optimized for 5.5 to 6.0 stability post-mixing
Solubility Profile 100% water-soluble; entirely sediment-free
Dosing Hardware Match Suitable for Dosatron injection and automated drip irrigation
Metric Dilution Rates & Feeding Chart
Plagron Hydro A&B must always be used in equal parts (\(1:1\) ratio). Never mix the concentrated Hydro A and Hydro B bottles directly together in their raw state, as this will cause immediate element lockout and irreversible nutrient precipitation.
The standard application rate maxes out at 1.6 mL per 1 Litre of water for each component:
Phase of Plant Cycle Hydro A Dosage per 1L Hydro B Dosage per 1L Combined Nutrient Strength (EC Guideline)
Early Vegetative Phase 0.8 mL / L 0.8 mL / L Low EC (\(\approx \) 1.0 – 1.2 mS/cm)
Peak Vegetative Phase 1.2 mL / L 1.2 mL / L Medium EC (\(\approx \) 1.3 – 1.6 mS/cm)
Early Flowering Phase 1.4 mL / L 1.4 mL / L High EC (\(\approx \) 1.6 – 1.8 mS/cm)
Peak Flowering Phase 1.6 mL / L 1.6 mL / L Maximum EC (\(\approx \) 1.8 – 2.2 mS/cm)
Late Flush (Final 1-2 Weeks) 0.0 mL / L 0.0 mL / L Plain water / flushing solution
Best Use Practices & Application Steps

1. Exact Order of Operations (Mixing Method)
  1. Fill your clean water reservoir with fresh water (ideally at an ambient temperature.
  2. Shake both Hydro A and Hydro B bottles vigorously before opening to homogenize the minerals.
  3. Calculate your dose, then add the Hydro A concentrate first. Stir the reservoir thoroughly for 1 minute.
  4. Add the Hydro B concentrate next in the exact same volume. Stir vigorously for another minute.
  5. Add any additional additives or bloom boosters (such as Plagron Green Sensation or Power Roots).
  6. Check and adjust the final pH level using a calibrated digital meter. Target 5.5 to 5.8 for optimal hydroponic absorption.
2. Run-to-Waste Drip Systems

Ensure your system triggers enough irrigation events to achieve a 10% to 20% runoff volume daily. This consistent flush prevents toxic mineral salts from crystallizing and building up inside the pore spaces of rockwool slabs or clay pebble containers.
3. Recirculating Systems (NFT, DWC, Flood & Drain)
Change out the entire reservoir solution every 7 to 10 days. Plants in active growth cycles selectively drink water and absorb specific minerals at varying speeds, causing the background pH and EC values to naturally fluctuate over time. Regular reservoir changes keep the nutrient profile perfectly balanced.
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  • Vendor:

    PLAGRON

  • Type:

    BASE NUTRIENTS

  • Tags: Plagron
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Precision Nutrition for Hydroponic Growing

Take control of your hydroponic feed with Plagron Hydro A & B, a highly concentrated two-part base nutrient designed to support plants through both vegetative growth and flowering.

The complementary A and B formulas provide a complete nutrient profile, including quickly absorbable chelated trace elements. Hydro A delivers calcium to support strong plant development, while Hydro B supplies magnesium to aid chlorophyll production and healthy growth.

Developed for inert substrates and hydroponic cultivation, Hydro A & B gives experienced growers precise control over nutrient strength, EC and pH while providing consistent mineral nutrition from start to finish.

Shop Hydro A & B

Frequently Asked Questions

Plagron Hydro A & B is a complete two-part mineral base nutrient for hydroponic growing. Unlike separate grow and bloom feeds, the A&B combination can be used throughout both the vegetative and flowering stages, providing plants with essential macro and micronutrients throughout the cycle.

Plagron recommends a maximum of 2.5 ml of Hydro A per litre of water, together with exactly the same quantity of Hydro B. This gives a mixing ratio of 1:400, making the concentrated formula economical to use.

The two components complement one another to create a complete nutrient solution while keeping certain concentrated mineral elements separate before dilution. Hydro A is particularly rich in calcium, while Hydro B supplies additional magnesium alongside its NPK nutrients. Always add equal quantities of A and B to your water as directed.

Hydro A & B is designed for inert substrates used in hydroponic cultivation. Plagron's 100% HYDRO programme pairs it with Euro Pebbles. While Hydro A & B can work with Plagron Cocos Perlite 70/30, Plagron recommends Cocos A & B as the base nutrient for that particular coco substrate.

Yes. Hydro A & B is designed for growers who want close control over their nutrient solution. Plagron recommends monitoring both EC and pH and advises a pH range of 5.5–6.5 for its 100% HYDRO programme. The appropriate EC will vary according to the plant and its stage of development.

Yes. Plagron's 100% HYDRO schedule combines Hydro A & B with selected Universal additives. Its recommended programme includes Hydro Roots during early development, Power Buds during flowering and Green Sensation later in bloom, allowing you to build a more complete hydroponic feeding schedule around the A&B base nutrients.