Continuing with the Northwest Perennial Alliance's Open Gardens tour on Vashon Island, which Peter The Outlaw Gardener, his partner Tom, and I checked out on Saturday, June 8. Mary and Whit Carhart Garden This garden, part of which is built into a steep hillside, overlooks Quartermaster Bay and was a lot of fun to explore and photograph, but also quite a workout. Peter mentioned that just walking the garden every day to check it out (every gardener does that, right?) would keep you in shape…