I have 4 hydrangeas 2 are blooming and 2 are not. I treat them all the same. one of the non blooming ones did have 1 bloom early in the spring and someone picked it off. I never got any more on that plant.. I did use miricle grow fertilizer on it, and also at another time I added some , aluminum sulphate so my flowers would be blue. It bloomed really heavy lalst year. The other non bloomer I replanted last year from my mothers yard after her death . It has grown very well but never bloomed. It is in almost same position to the sun as the one that is blooming 2 feet away from it.
any help would be apprec iated. Betty