Rol's vegetable garden is one of the wonders of Heath. His is one of two very different gardens that I visited last week. My neighbor Rol is the garlic and onion king. This spring he coordinated a group order of onions from Dixondale Farm. I  bought 60, and though we planted at the same time I can tell you that my onions look nothing like his. Weeding and watering seem to be  key elements to success. Many of…