I was told to apply a product to guarantee blue blooms. What is the name of this product and how and when do I apply it?

Happy to help! The product you are looking for is called Color me Blue – it contains minerals to acidify your soil which will turn your blooms blue. Read this article to learn how to apply this product to your Endless Summer^® Hydrangeas. If you’d like to learn more about the science behind this, our video on hydrangea soil science is a great resource.