An architectural expansion to this traditional lakeside cottage led to an extraordinary garden. Nestled into a steep woodland dune, the garden climbs 15 feet up a hillside and surrounds the home. At its summit, the garden blends seamlessly with a green roof that blankets a new screened porch. The layered network of annuals and perennials growing through permanent shrubs and ground cover enhances the feeling that this is a natural and mature garden.