Is there some sort of chemical reaction that happens between something in the hydrangea and the added substances? or what is the cause for the color change?
Why do hydrangeas change color when dolomitic lime is added (pink) or when aluminum sulfate is added (blue)?
Hydrangeas will be red in acidic soil, and become blue in base soil.
dolomitic acid produces acid, and it'll decrease the pH of the soil. Thus it'll be pink.
Aluminium Sulphate will increase the pH of the soil and make it become basic, and it'll turns hydrangeas flower into blue.
Reply:Different chemical compounds have different colors because different wavelengths of light are absorbed and/or reflected by their molecules.
When you add stuff to the soil, it often causes changes in the chemical composition of the pigments in the flowers.
Wisdom Teeth
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