How do Hydrangea plants help us to find the nature of the soil ?

Explanation

1. Hydrangea plants have different colours of flowers based on the pH of the soil.
2. If the pH of the soil is below 5.5, it gives blue flowers.
3. If the pH of the soil is below 6.5, it gives pink flowers.
3. If the pH of the soil is below 6.5, it gives pink flowers.
4. In this way, it helps us to find the nature of soil