No matter how devoted we are to our gardens, most of us would admit that the most important crop we tend is the children in our lives. The Major and I are happy to let the gardens take a back seat to grandson pleasures on these cool summer days.  We had to say farewell to Tynan, but we met our daughter Betsy and her older son, Rory, in Amherst for lunch and a 'backyard circus at the Emily Dickinson…