What will happen to the hydrangea if it is doused with coagulant for the pool

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Hydrangeas were and are favorites in many gardens. But there is only one moment that is not always liked. Hydrangeas bloom pink, and the purple or blue color is quickly lost. There is an unusual method that will help you return the color of the flowers you want.

About the colors of hydrangeas

Garden hydrangeas can change color because the leaves contain special substances called anthocyanins. It is they who react to changes in soil acidity and change the color of inflorescences. By the way, white and panicled varieties do not change color.

Globular flowers of garden hydrangea are a kind of litmus paper, by which you can understand the level of soil acidity. If it blooms pink, the soil is alkaline or neutral — above pH 6.5. When it changes to blue, it is lower than pH 5.5. Inflorescences of purple color – slightly acidic soil pH 5.5 – 6.5.

How to change the color to purple

It is for this purpose that you need a pool coagulant. According to some gardeners, it can replace aluminum salts to change the inflorescences of hydrangeas from pink to purple. Dissolve 2 tbsp. l per 1 l of water. Pour under the root. After a certain time, hydrangeas will bloom with flowers with a changed color.