I love Hydrangea and in the garden I have several (paniculata, petiolaris, macrophylla....). I've always been intrigued by the "mystery" of their color changes. I have a macrophylla '"Blaumeise" that was given to me in pot 12 years ago as "pink" but since I put it in the ground it has changed, slowly, slowly, its color and today it is a decided blue. A 2009 cutting of H. macrophylla that grew up with pink and celestial flowers in the past three years is flourishing in white that is veering slightly to light blue. And this year is in this way Everything normal will be said, matter of water and soil! On this I do not discuss but I wonder why another macrophylla in the same soil, irrigated with the same water does exactly the opposite? In 2016 it was as in the picture on the left in the past three years it has begun to turn bright pink and this year it is like in the other picture. Moreover why two cuttings of 2011 from Hydrangea macrophylla white white (and to what I know the "whites" would not bleach color except in some cases of rather old plant) have both produced flowers of color? I can't give reason for what is happening! Can anyone help me understand? Thank you! Note - I'm not sure if this is the section suitable for my discussion but I read that it will eventually be moved.