Turning pink hydrangeas blue can be a lengthy process, often taking several months or even an entire growing season. It’s important to note that not all hydrangea varieties can change color, so it’s crucial to choose the right type for your desired outcome. The color change is influenced by the pH level of the soil, with acid soil resulting in blue flowers and alkaline soil producing pink flowers.
To turn pink hydrangeas blue, you need to lower the pH of the soil. This can be done by adding amendments such as aluminum sulfate or elemental sulfur. However, it’s important to be patient and not expect immediate results. The process may take some time, and it’s not uncommon to see only a few flowers changing color at a time while others remain pink.
The first step in the process is to test the pH level of your soil. This can be done using a soil testing kit, which is easily available at gardening stores. Once you have determined the pH level, you can take appropriate measures to adjust it.
If your soil is alkaline (pH above 7), you will need to make it more acidic to achieve blue flowers. One method is to apply aluminum sulfate to the soil. This can be done by sprinkling it around the base of the plant and watering it in. Follow the instructions on the packaging for the recommended amount to use.
Another option is to use elemental sulfur, which gradually acidifies the soil over time. This can be added to the soil in the fall or early spring, as it takes time to break down and lower the pH. Again, it’s important to follow the instructions on the product for the correct application rate.
Once you have amended the soil, it’s important to continue monitoring the pH level and making adjustments as needed. This may require multiple applications of aluminum sulfate or elemental sulfur over the course of several months.
It’s worth noting that the color change may not be immediate or uniform. Some flowers may turn blue while others remain pink, especially if the plant is not evenly absorbing the amendments. In such cases, it’s important to be patient and continue to amend the soil as needed.
Additionally, it’s essential to maintain proper care and maintenance for your hydrangeas throughout the growing season. This includes regular watering, mulching, and fertilizing according to the specific needs of your hydrangea variety.
Turning pink hydrangeas blue can be a lengthy process that requires patience and ongoing soil amendments. It’s important to test the pH of your soil, make appropriate adjustments using aluminum sulfate or elemental sulfur, and continue monitoring and amending as needed. Remember that not all hydrangea varieties can change color, so choose the right type for your desired outcome.
