Plagron Hydro A+B bottles in multiple sizes on a white background

Plagron Hydro A+B 1 L bottle set on a white background

Plagron Hydro A+B

Hydro feed
Mix A and B separately
Mix A+B separately

Plagron Hydro A+B is a complete mineral feed for inert substrates and hydro systems, including advanced semi-hydro setups. It gives precise nutrition when the medium supplies almost nothing itself. Suitable for growers who are comfortable measuring nutrient strength and pH before watering.

Quick facts

Type: Hydro base fertilizer
Substrates: Hydro, Inert media, Passive semi-hydro, and LECA
Dosage: 2.5 ml/L A + 2.5 ml/L B
Frequency: Every watering as needed
Skill level: Advanced
pH/EC: Required

€16,50

VAT included · plus

Please note: Most fertilizers ship separately from plants. A separate shipping fee may apply, and the final cost is calculated at checkout by order weight. Free shipping does not apply.

Size:

1 L 5 L 10 L

Variant

4.6/5 store rating · 20,000+ customers served

Tracked shipping

Plagron Hydro A+B is a two-part mineral nutrient for hydro and inert substrates. It is for growers who manage nutrient solution rather than relying on potting mix.

Measured hydro-style care

It suits advanced houseplant growers running reservoirs, drain-to-waste systems or inert substrates where water management is part of the plan. This is more technical than ordinary plant food.

Match it to hydro setups

Hydro A+B makes sense when the growing method demands precision. Soil and organic containers are better served by Plagron’s Terra or Alga products.

Is it right for your plant?

Substrate HydroInert mediaPassive semi-hydroLECA
Best for Advanced setupsHydro setups
Helps with Active growthRegular feedingFlowering support
Choose another product for soil feedingOrganic reservoir feedingStagnant nutrient solutionssingle-bottle base feeding

Plagron Hydro A+B is a strong fit for hydroponic houseplants, LECA, clay pebbles and other inert media. It fits experienced semi-hydro growers who prefer a complete A+B system.

Soil and organic mixes are better served by Plagron Terra or Alga products.

What's inside:

NPK Ratio: Hydro A NPK 3-0-1 + Ca/Mg; Hydro B NPK 1-3-6 + Mg
Nutrient basis: Mineral two-part

Plagron Hydro A+B is a two-part mineral nutrient for hydro and inert media. It is built for plants that rely on the nutrient solution rather than the substrate.

Hydro A is NPK 3-0-1 with calcium and magnesium; Hydro B is NPK 1-3-6 with magnesium. The two parts need separate dilution before pH or EC fine-tuning.

How to use it

Use Plagron Hydro A+B up to 2.5 ml/L Hydro A and 2.5 ml/L Hydro B in fresh water. Mix A thoroughly before adding B, then adjust the final solution to pH 5.5-6.5.

Use for nutrient solutions in inert hydro media, refreshing the reservoir as needed.

➜ A few notes before measuring, mixing or applying :

Keep A and B concentrates apart until each has been diluted in water. Clean reservoirs regularly so roots are not sitting in old nutrient residue.

Adjust pH after both nutrient parts have been diluted and stirred through.

Plagron Hydro A+B

€16,50

Frequently Asked Questions about Plagron Hydro A+B

Is Plagron Hydro A+B suitable for LECA and semi-hydro?

Yes. It is a strong fit for hydroponic houseplants, LECA, clay pebbles and other inert media that rely on solution feeding.

Is Plagron Hydro A+B a complete fertilizer?

Yes. Hydro A and Hydro B work together as a complete mineral hydro feed. EC and pH control are part of using it properly.

How should I mix Plagron Hydro A+B?

Use up to 2.5 ml/L of Hydro A and 2.5 ml/L of Hydro B. Mix A thoroughly into water before adding B, then adjust pH to about 5.5-6.5.

Epipremnum aureum cutting, LECA, self-watering pot, water level indicator, and bottle of liquid fertilizer laid out separately on white background

Fertilizing

How to Fertilize Houseplants in Semi-Hydroponics (LECA, Pon & More)

Flatlay of various inert substrates on a white surface: LECA, pumice, Mapito, perlite, Pon, vermiculite, zeolite, Seramis, and lava rock.

Plant Care

The Science and Art of Non-Organic Plant Substrates for Semi-Hydroponic Systems

Close-up of a healthy white root system of a houseplant growing in mineral semi-hydroponic medium.

Plant Care

From Soil to Semi-Hydro: How to Convert Houseplants Safely

Experience you can count on

More than 20,000 customers, rated 4.6 out of 5 stars.

Quality first

Plants are hand-selected and checked before shipping.

Reliable shipping

Safe packaging and tracked shipping from DE and NL.

Small business

Support a small, independent, women-led family business.

Row of various potted baby plants (starter plants) on a white background

Shop Baby Plants ➜

Our Customers

rate us with 4.6 out of 5 Stars

★★★★★

Die Pflanzen waren prima verpackt und ein heatpack war im Paket enthalten. Die Lieferzeit hat 2 bis 3 Tagen gedauert, was aus meiner Sicht wirklich gut ist. Alle drei Pflanzen haben die Lieferung gut überstanden. Ich habe mich auf Hoyas spezialisiert und habe schon die nächsten Pflanzen meiner Wunschliste auf der Website gefunden. Daher wird die nächste Bestellung nicht lange auf sich warten lassen.

Marion

★★★★★

The plants are carefully packaged and arrive in great conditions (I’m based in Spain) and they’re always there to help in any way they can with your purchase.I have and will always recommend Foliage Factory to every friend I can. I’m not only satisfied with their plants and prices, but their customer service is exceptional.

José

★★★★☆

Very healthy and well packed plant. Unfortunately there was one plant that ordered couldn’t be delivered as it was out of stock hence 1 star less.

Sam

★★★★☆

Die Sendung kam leider in keinem guten Zustand bei mir an, kann passieren. Habe mich darauf hin sofort an Foliage Factory gewandt und habe selten einen so guten, schnellen, freundlichen und kulanten Kundendienst erlebt.

Frauke

★★★★★

Everything arrived in good condition and very well packed - it wasn't easy with a fragile plant and a heavy bag of substrate. I recommend it!

Lia

★★★★★

Bester online-Pflanzenhandel den ich kenne (habe davor 4 andere ausprobiert). Eine teure Pflanze wurde beim Transport beschädigt und mir ersetzt. Der Kontakt dabei war auch sehr nett (danke Jan) und hat mir gut geholfen. Die anderen Pflanzen sind in einem sehr guten Zustand, keine Schädlinge, super Bewurzelung. Nur zu empfehlen! :)

C L

★★★★★

Super Service, Gute Auswahl, Preise sind fair. Eine Pflanze kam kaputt an, hab sofort Ersatz bekommen. Danke an den unkomplizierten (und blitzschnellen) Kundenservice!!

Sarah

★★★★★

Envoie très rapide (2 jours), plantes parfaitement emballées et super offres ! Je suis une habituelle j'ai passé 6 ou 7 commandes et je n'en peut être plus satisfaite du service client et de la qualité et variété des plantes offertes

Iris

★★★★★

The plants have arrived in perfect condition, the roots and the foliage so so healthy! I had problem with 1 plant out of 16 and they have responded to my email almost instantly and the issue was resolved straight away. I'm really impressed and satisfied, definitely getting more plants from them again!

Patricija

★★★★★

I received perfectly heathy and absolutely beautiful plants, even bigger than expected. The delivery within Europe was really fast. I think Foliage Factory has one of the best plant web shops in the internet. It‘s just great to get so much informations about the plants. I will definitely order again :)

Walkerova