Centuries ago there was tulipomania. More recently and on a larger stage, there was the dot-com bubble, followed by the housing bubble. We know what happened to them.
Gardeners now seem caught up in a hydrangea frenzy. There are mopheads, lacecaps, and Annabelle types, not to mention oakleaf and Japanese panicle hydrangeas. For the truly smitten, there are Japanese mountain hydrangeas (serrata), villosas, and other more tender species and varieties.
In today’s popular culture the only thing worse than bad publicity is no publicity at all.
That has been the fate of deutzias, June-flowering shrubs related to mock orange. Both members of the Saxifragaceae family seem to be hopelessly out of fashion, and undeservedly so.