How To Keep Blue Hydrangeas Blue 12 Steps With Pictures
The scientific reason behind this is that different levels of aluminum become available to the plant depending on the soil’s acidity level (also known as pH). Acidic soils have a high aluminum content, turning the flowers blue. An alkaline soil will produce pink blooms in hydrangeas; an acid soil will cause the same plant to bear blue flowers. The exception to this is white or green hydrangeas, which are unique varieties and don’t change color....