When brutal St. Louis summers end, a new season begins, marking the opening of?Sullivan Farms. Each autumn, the North County farm offers fall refreshments, hay rides, pumpkins, and decorative gourds. However, its work really begins in November, when the farm sets up Christmas-tree lots throughout the area. Stocked with eight precut varieties ranging in size from 3 feet to more than 16 feet, each lot's staff members bale and attach trees to vehicles for free. To complement holiday trees, Sullivan Farms offers an assortment of fresh wreaths and pine roping.