On a June evening the meadow edges at Caleb Smith State Park Preserve go loose and humming — bee balm, milkweed, black-eyed Susan leaning in the last warm air that drifts up from Smithtown Bay. Wildflower Landscape Designs Inc brings that same feeling into yards around Smithtown, planting beds and borders that bloom in sequence and mixing them with lawn care so the grass and the gardens frame one another instead of competing. Salt-touched wind, sandy soil and the bright open light this stretch of the North Shore gets all narrow what will actually thrive here, and the plant list follows the place rather than a catalog. Mulched beds, clean bed lines, mowing and trimming on schedule, deadheading through the long middle of summer. By August the borders are full and the lawn holds its shape right up to them, and the yard is somewhere a person wants to sit until the light goes.