Hydrangea Flower Color Change. It is much easier to change a hydrangea from pink to blue than it is from blue to pink. Hydrangeas are popular in gardens because they have a remarkable capacity to change their shade.
06052021 Hydrangeas are prized for their vibrant blooms. If aluminum is present and available as it is in more acidic soils flowers are blue. Macrophyllas can change colors.
The more alkaline the soil the pinker the flowers.
It is much easier to change a hydrangea from pink to blue than it is from blue to pink. More specifically its the presence of aluminum ions and the plants ability to absorb aluminum that impacts flower color. 04012021 As mentioned the soil pH determines the flower color. Hydrangeas change color except for the white ones based on the pH level of their soil.