I just bought some BloomStruck Endless Summer hydrangeas. I always thought hydrangeas were blue or pink regards to the soils Ph. Now will the BloomStruck hydrangeas always be a purple color or will they turn blue or pink if I don’t have the correct Ph?
BloomStruck will be blue-purple in acidic soil. It will not be the Carolina blue of The Original, so you are on the right track. You’ll want your pH to be closer to 5.5, so if you need to lower it you’ll need to add aluminum sulfate: https://www.youtube.com/watch?v=IY6Sb0dPl3g.