How Do You Change The Color Of A Hydrangea Blossom From Green To Blue?
Not all hydrangeas change color. Naturally white hydrangeas will say white no matter what. However, plants such as the variety known as Big Leaf Hydrangea will turn blue in soil with an acidic pH lower than 6.0, and red or pink in soil with an alkaline content. The color change is due to the amount of aluminum in the soil. There is more aluminum present in acidic soil than in alkaline soil. To change the color of your hydrangeas, change the pH of the soil. Determine the pH of your soil by taking a sample of soil from the drip line of your hydrangea bush. Most pH testing kits come with a liquid that will change color when added to a solution of soil and water. The color that the solution turns helps to determine what your soil pH is. Scratch a cupful of lime into the dripline of your soil beneath the hydrangeas to increase the pH of soil, or turn it more alkaline. Use aluminum sulfate to lower the pH, or make it more acidic. Water the soil well with a watering hose to soak the soil amen
