Hydrangea (Hydrangea macrophylla) http://www.durgan.org/ShortURL/?VYEXX 13 Juyly 2008 Hydrangea (Hydrangea macrophylla) Thjis pretty plant usually gets touch by frost in May, but still blooms. It is cut back to ground level in the early Spring. The flower colour may be changed from pink to blue by modifying the pH by adding aluminium sulphate to the soil.
