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Included in the A-Grade Rewards Program

PLAGRON Hydro A/B Set - A-Grade Hydroponics


“A dedicated hydroponic nutrient, perfect for those running recirculating reservoirs, unique hydro systems and (DWC) Deep Water Culture growing.”

What is the difference between Plagron Hydro A/B and any other A/B nutrient?

When growing hydroponically most of the substrates we use are inert, meaning the nutrient value of that substrate is 0, this nutrient takes that into consideration by having a greater concentration of calcium available. Inert substrates take on the EC of the solution they are irrigated with, this A/B is buffered with a higher amount of calcium to avoid underfeeding problems later on.

Plagron Hydro A/B is a highly concentrated mineral plant nutrient for use during the plant’s growth and flowering phase. Containing all trace elements in a readily available (chelated) form.

The same dose of Hydro A/B from each bottle together in water results in a complete nutrient. Hydro A/B can be used on all types of inert substrates (Clay, Grow wool & perlite for example)

Instructions & Dose:

  • Shake well before use.
  • Add a maximum of 2.5ml Hydro A2.5ml of Hydro B per 1 litre of water.
  • With every application of Hydro A use the same quantity of Hydro B.
  • Use this nutrient set each time the plants are irrigated.
Hydro A: NPK (3-0-1) Calcium 4.2% Magnesium 0.4%
Hydro B: NPK (1-3-6) Magnesium 1.4%


*All orders are dispatched in unmarked boxes to maintain your privacy.*


Orders are shipped via Australia Post or Big Post. Orders are generally dispatched on Tuesday, Wednesday and Friday. Please allow for additional delivery time for remote areas. If you require express delivery, please contact our sales representatives at 03 9555 6667 or email to obtain a quote. 

Couriers will attempt delivery to the specified address. If no one is home to receive the delivery, the couriers will leave your parcel somewhere safe. If there is no safe place, re-delivery or collection will be organised.

We reserve the right to charge for any redeliveries if they occur. You are welcome to call us if special arrangements need to be made.  

Due to the increasing frequency of online fraud and theft, we are unable to ship to P.O. Boxes and Parcel Lockers.


All freight charges are calculated on weight, dimensions and location. We are committed to keeping shipping charges at a minimum and do not charge handling fees.

Please note: Freight costs are subject to change. Regional areas, large and bulky orders, and tail-lift delivery occasionally incur an additional levy. Should these costs need to be amended it will be to reflect the actual charges, and not incur additional ‘shipping and handling’ fees.

We will notify you if this rare situation occurs.



All payments must be cleared before dispatch. Payments can be made online via PayPal, AfterPay or Electronic Funds Transfer. Payments can also be accepted via credit card by phoning 03 9555 6667.

Please allow at least 24 hours for payments to clear.


You will be notified immediately if an item is permanently unavailable, with options for a replacement item at equal or higher value, refund or store credit.

All refunds will clear within 3-5 business days. Store Credits will be issued as an electronic Gift Card to be used online or in-store.


We comply with all necessary restrictions and guidelines when shipping any products classified under the Dangerous & Prohibited Goods & Packaging Post Guide.

If, for any reason in compliance with these guidelines, we are unable to fulfil an order a refund will be issued immediately.