what do you put in the soil for hydrangeas to keep their color
To change the color of your hydrangeas, add the following to the soil: CHANGE TO PINK. For hydrangea blooms to be pink, the plants must not take up aluminum from the soil. If the soil naturally contains aluminum, one must try to keep it away from the hydrangea's system. Following are a few tricks that might work:
The addition of lime to the soil around the hydrangea wonât change the flowerâs color overnight. Depending on the soilâs texture, it may take months or even up to three years, according to Reeves. Monitor the soilâs pH twice a year.
Many people will quickly respond it is the pH of the soil. On one hand they are correct, soil pH definitely plays a role in flower color. However, it is the availability of Aluminum (AL) to the plant that affects flower color. Aluminum is a naturally occurring mineral that is found in most of our native soils.