Changing Color of Hydrangea
I bought a white hydrangea two years ago and it bloomed white until this year. It now has light blue blossoms and some white ones. How do I make it only bloom white?
Certified GKH Gardening Expert
Raising the pH of the soil should help. This article will help you with that: https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/lower-acid-soil.htm