Vitax Hydrangea Colourant 500g Hydrangeas growing in the presence of iron or aluminium salts which will tend to change colour and produce blue flowers Varieties naturally pale pink tend to blue best, the darker pink varieties turning to mauve/blue Best results are obtained with plants growing in acid soil Available in pack size: 250g

Due to geographical locations we are unable to deliver to: Isle of Wight, Isle of Man and Ireland.