If I could only choose one plant to grow in my garden, apart from being a dreadful choice to have to make, I would choose the genus Hydrangea. It has over 70 species and two main flower arrangements, Mophead and Lacecap. Beyond that I know very little except that from a photography point of view you get year round photos. This is of some of the remaining flower heads of one of my Hydrangea petiolaris, which climbs with abandon over a shed.