Westland Hydrangea Colourant is designed to change the flower colour of pink hydrangea varieties, turning them blue, while deeper pink varieties shift to a mauve blue shade. The colour change works by adjusting soil conditions, allowing hydrangeas to absorb the nutrients required to influence flower colour naturally. This colourant is most effective when used on hydrangeas growing in acidic soil conditions. In gardens with naturally alkaline soil, using an ericaceous compost or increasing the application rate will help achieve the best results. The formulation also supports overall plant health, helping maintain greener leaves and encouraging strong flowering alongside colour development. Features Changes pink hydrangea flowers to blue Turns darker pink varieties to a mauve blue shade Acidifies soil to support blue flower colour Contains iron and aluminium salts for effective colour change Includes potassium to support and boost flowering Helps maintain greener leaves during the growing season Best results achieved in acidic soil conditions
