I have hydrangeas they were planted 3 yrs ago, first year they bloomed . They have not bloomed since .Ifeel that I have taken good care with them , they are growing taller with lots of leaves. No blooms.
This is pretty difficult to answer without knowing what type of hydrangea you have. The only clue I get is that they are getting taller which means that it is possible that they are getting leggy due to too little direct sun or maybe not enough enough phosphorus is being provided. Espoma Flower-Tone would help with that. The best suggestion I have is for you to visit this website to figure out what type of hydrangea you have and how to properly care for it: . . http://www.hydrangeashydrangeas.com/