A mid-Atlantic design/build firm is converting homeowners into native plant advocates, one lawn at a time. By Jared Brey Refugia specializes in transforming lawns into pollinator-friendly habitats. Photo by Kayla Fell for Refugia. Jeff Lorenz stood under the mid-June sun at FDR Park, monitoring the final touches on his company’s exhibit for the Philadelphia Flower Show. The exhibit space, ordinarily an asphalt parking lot, had been covered in mulch and lined with displays, all in the final moments of construction. Teams of employees scuttled about in branded T-shirts—“REFUGIA: Functional Design for the American Landscape”—placing trees, shrubs, grasses, moss, and flowers in clumps for planting the next day. The plants were…