WANT BLUE HYDRANGEAS AND GOT PINK?

Most hydrangea varieties are capable of growing flowers in shades of pink or blue it is just the white ones that are always white. It is the amount of aluminium present in the plants sap that gives it its colour. Aluminium is most easily absorbed from acid soils and so you will find it hard to get really blue hydrangeas on limey or chalky alkaline soils. If you have pink hydrangeas in an acidic soil you need to add more aluminium and so buy some hydrangea colourant from your gaden centre like St Bridget Nurseries. Apply it weekly throughout the growing season every year and you should get blue blooms!