Only two types of Hydrangeas can have their bloom color changed. Varieties in the Bigleaf (H. macrophylla) and Mountain (H. serrata) families can produce pink or blue blooms by adjusting the soil pH. When attempting to change hydrangea bloom color, remember color intensity will depend on the variety. Soft, pastel pink blooms will turn pastel blue or lavender, and vice versa. Vibrant, saturated pink blooms will change to a rich, saturated blue-purple, and vice versa.
changing bloom color
pink or blue
changing bloom color
mophead & mountain hydrangeas
As you experiment with the soil pH around your own hydrangeas, remember that patience is key. With a few simple adjustments to soil pH, mindful pruning techniques, and proper watering practices, the reward of beautiful blue or pink hydrangea blooms awaits. Happy gardening!
Complete Guide to Hydrangea Gardening