Rowayton mornings smell of low tide and boat varnish, and the yards along the Five Mile River are small, sloped and particular about how they are handled. J. Cardenas Landscaping treats them accordingly — mowing tight lawns without tearing the corners, trimming along seawalls, fences and stone, edging the driveways, clearing beds in spring and fall. Salt wind is hard on grass in this part of Norwalk, so patience and a steady cutting schedule accomplish more than anything else can. On a June afternoon with the tide up and the lawn just cut, a property sits a little brighter against the water.