Ooh your blue hydrangeas are so sweet ! I have blue ones in my garden that over time are colored pink, which give flowers going from blue to pink passing by very nice tones of mauve ! ^_^ But blue hydrangeas are very typical to Brittany, that's why I love them so much, as I adore Brittany ;-)
Yours are gorgeous,
upvoted and resteemed they are my dear !
The ones at our home in the UK are pink and white, I have planted blue but they always change to pink.
Yes they need a specific care to maintain the blue : make regular intake of alum, and every year a supply of heather soil that will maintain the acidity of the soil. @opheliafu ^_^