My Friend Elsa Though I haven’t read Dear Friend and Gardener I have my own great garden friend. When I moved to my Massachusetts hilltop, I found that one of our area’s most famous perennial gardeners, Elsa Bakalar, lived on a neighboring hilltop. She was a generation older, British, much more knowledgeable about flower gardens, and way more opinionated than I was about anything but happy to befriend a novice. She is a born teacher, and even now…