I have been waiting for the sun and more florets to show pink to capture the beauty of this plant. My grandmother or aunt had a blue one of these in the yard, as did many southern families. I have a blue one also. The soil’s pH determines whether the blooms are pink or blue or a combination.
To encourage blue hydrangea flowers, grow the plant in soil that has a pH of 5.2-5.5. If your soil is more alkaline, you can lower the pH by applying Soil Acidifier at the rate specified on the package. Soil pH can also be lowered (more gradually) by applying an acidic organic mulch, such as pine needles or pine bark.
My plants are within 10-yards od each other, yet the acidity of the soil is different. There are other factors with regard to the intensity of the color. Anyway, I am happy to see them in bloom here.