In an Inquirer column, Eva Monheim of Temple's Department of Landscape Architecture and Horticulture offered seasonal gardening tips. In the Philadelphia region, you can plant bulbs until the first week in December as long as the ground isn't frozen. According to Monheim, it's also time to empty bird baths and other pottery, trim dried stems, protect potted rosemary plants, pile tree branches tepee-style to provide a structure for rambling vines, edge plant beds with metal strips and stakes and generally see what nature is up to.