Evergreen trees include species other than pines and cedars. Fir, hemlock, holly, spruce and even species of oak trees also live as evergreen trees, surviving the winter in an active state. Evergreen trees grow in special shapes and include other determining factors that help in classifying the tree species. The two main shapes seen in evergreen trees include rounded cone shapes and the pointier, pyramid shape. Oaks that exist as evergreens generally produce in the same growing pattern as regular oak trees but survive through the winter, earning them the nickname "live oaks." Trees growing in rainforests and similar warm climates are also considered as evergreen trees because the growing season, temperature and weather patterns allow the trees to grow year-round.
Ideal for privacy fences, evergreen shrubs offer year-round isolation from the world outside your home. Evergreen shrubs and bushes naturally grow into different shapes and pattern. Natural shapes include dome shaped shrubs as well as those shrubs that spread or fan outward. Despite their natural shapes, homeowners may prune evergreen shrubs into various shapes, including the forms of animals. The dense growth of leaves and stems on evergreen shrubbery prevents outsiders from seeing into your home and prevent harsh weather and piling snow from penetrating to the shrubs interior growth.
Various other plants fall into the category of an evergreen, by simply surviving the winter without going into a dormant state. Most of these plants live in tropical climates, away from the threat of cold weather and where sunshine allows abundant growth year-round. However, some plants survive as evergreens in deciduous forests and harsher climates. Mistletoe, the plant frequently hung from arches and doorways around Christmastime, is a parasitic evergreen plant that grows high in various trees. During the winter, the green mistletoe remains on the tree tops, surviving on nutrients drawn from the victimized tree during the growing season.