Why Do Hydrangeas Change Color?
Hydrangeas turn blue in acidic soil and pink in alkaline soil — but only certain species do, and only because of aluminum. Here is the actual chemistry, and how to control the color yourself.
General home and garden guidance spanning indoor and outdoor living.
Hydrangeas turn blue in acidic soil and pink in alkaline soil — but only certain species do, and only because of aluminum. Here is the actual chemistry, and how to control the color yourself.