You never expect your perennials to proliferate when you are a young gardener You carefully plant your first perennial bee balm or Siberian iris or coral bells.  You set out your plants neatly and sigh with accomplishment and pleasure expecting that these perennials will look just as they do that day forever. After caring for flower gardens for the past 40 years you would think I had outgrown this daydream. But, alas, as I evaluate my Greenfield garden,…