Blue Hydrangea Bloom: How Do I Keep My Hydrangea Blue?


Date: May 26th, 2016


To keep your blue hydrangea from turning pink, aluminum must be present in your soil. Additionally, a low soil pH level is ideal to make sure that the aluminum is readily available and able to be absorbed by your plant’s root system. Blue Hydrangea

Adding aluminum sulfate to your soil is a great way to accommodate for both of these requirements. It will ensure that aluminum is present in the soil and will also help lower the soil’s pH. Another way to lower the pH is to add organic matter to the soil. This can easily be done using Miracid or Hollytone. Composting your coffee grounds, fruit and vegetable peels, and grass clippings also works well.


Lastly, any fertilizer you use will greatly affect the color of your hydrangea. Fertilizers low in phosphorus and high in potassium are great for producing a beautiful blue color. For example, a 25-5-30 (nitrogen, phosphorus, potassium) fertilizer is a great choice for soil anywhere near your hydrangea plant.


If your soil tends to be naturally chalky (highly alkaline) without any significant amount of aluminum, you will have to be very diligent about conditioning your soil accordingly. Your best bet may be to grow your hydrangea plant in a large pot rather than in the ground. This would allow you to better control the soil conditions and maintain a healthy blue hydrangea plant.




If you have any further questions regarding hydrangeas, email me at, or visit your local CountryMax store today!



Additional Resources:

<< Back - Email this Page

Add your own comment:

Please login or sign-up to add your comment.

Comments (0): Subscribe by Email

There are no comments yet.

<< prev - comments page 1 of 1 - next >>