Until further notice, I vote Tuff Stuff Ah-Ha as the most beautiful hydrangea no one knows about. I know that is an exaggeration, especially in light of the fact it is Proven Winners' National Hydrangea of the Year. If I showed you a blossom, you might think it's a lacecap hydrangea. But I will bet most of the lacecap hydrangeas you’ve seen are selections of bigleaf hydrangea, known botanically as Hydrangea macrophylla. These are also often called French hydrangea, though they are not from France. Tuff Stuff Ah-Ah is a mountain hydrangea known botanically as Hydrangea serrata. It is from the h...