I haven’t always liked hydrangeas. As a child living in the Bronx, I saw a number of houses on our street wirh tiny yards that held a blue hydrangea or two. In spite of the interesting color and flower heads that everyone called ‘snowballs’ I did not like them.  Who can explain dislikes? And the things a child takes against are even more mysterious. Though I rarely saw hydrangeas in gardens as a new gardener,  over the past…