By Masie
United Kingdom 
Hi guys! Please can anyone please tell me why the petals on my white hydrangea heads are randomly turning brown, and also is there a way to change the colour of the blooms to pink or blue.many thanks, masie
7 Jun, 2015
Could be dryness or the recent gales.
You can't colour a white one. The colour change is only blue/pink, depending on the acidity or not of the soil.
7 Jun, 2015