The colour of hydrangea flowers - whether blue, red, or white - is largely influenced by the pH level of the soil they grow in. Acidic soil encourages blue tones, while alkaline soil tends to produce pink hues.

Bridal Bouquet, a beautiful white hydrangea, can develop a pink tinge if the soil is more alkaline. This colour change typically appears towards the end of the flowering season, though in some cases, the flowers may start pink from the beginning.

To help maintain its white colour and prevent future discolouration, apply sulphate of potash every six weeks from early spring until mid-December. Potash enhances the natural colour of flowers, including hydrangeas and roses. Be sure to water the fertiliser in well so the plant’s roots can absorb the nutrients effectively.

For further advice on caring for your hydrangeas, read our How to Grow Acid-Soil Loving Plants Guide.

For issues with hydrangeas, read our helpful Q&A's for more advice.