URBN, the parent company of Terrain, Urban Outfitters and Anthropologie, has filed plans to the Zoning Board of Appeals to convert the former Whole Foods plaza at 297–311 Boston Post Road into a destination complex. The proposal is composed of a 4,500-square-foot farm-to-table restaurant, a 9,000-square-foot event hall for 175 guests, a second 120 seat dining room and about 6,500 square feet of indoor retail for home décor and specialty gardening. Seasonal merchandise would occupy up to 6,000 square feet outdoors.The company is working with Grossman Development Group of Framingham, which has the site under agreement and would lease it