It’s September, so every garden I know of is bursting with Clara Curtis daisies. These pretty fall bloomers are a member of what was once the chrysanthemum family. (It’s been broken up by plant scientists and classifiers, and these are in the Dendranthema genus now.) Whatever their scientific name, these hardy mums are incredibly easy to grow. They also spread. About four years ago, I bought one plant. I now have Clara Curtis daisies in four flower beds. I can’t bear to get rid of them because just when other parts of the garden start to look droopy, these guys burst into their pink and yellow glory. Many of the catalogs and plant web sites will say Clara Curtis daisies bloom from June on, but not around here. They always wait until September.