2kg of Aluminium Sulphate Al2(S04)3 Iron Free - Mordant/Purifier/PH reducer

Turns my pink hydrangeas blue

The product arrived very quickly and was packed in a water proof resealable clear plastic bag. I’ve used it and looking forward to the results in a few weeks time.

Have not been able to test produce at the moment, it takes time for the substance to work in garden. Everything else as per the title.

Easy to use

We got this to change the colour of hydrangeas in the garden. You need to handle it with care. It is cheaper to buy it this way than specialist gardening products.

Good product. Using it to speed up the setting time of plaster. Works a treat

As expected

Dissolves easily in water to give a nice clear solution. Ideal for maintaining or developing the blue colour of hydrangeas. Also useful for improving the colour of a variety of plants. Water your hydrangeas with a solution of 30 grammes of hydrated aluminium sulphate per gallon of water .