If you select any attributes with or without a plant name, you will see a much narrower selection of results taken only from the old RHS Plant Selector database. These plants will have a lot more details displayed including an image. Our Botanical team are working hard to increase the number of plants. For the best prices on Mahonia Winter Sun plants and many other Easy to Grow Evergreen Trees and Shrubs, Shop online at Garden Goods Direct. Sign up for our newsletter and receive weekly tips and additional discounts today. 04/01/2018 · Mahonia x media ‘Winter Sun’ is small to medium-sized evergreen shrub capable of growing ten feet tall and five feet wide. It becomes a prized specimen when it blooms in the late fall or early winter, producing fragrant yellow flowers. These inflorescences develop into clusters of waxy blue berries eaten by many bird species.