Name Different Types of Evergreen Trees
Trees that retain their foliage year round are called evergreen trees. From the polar regions to the tropics, there are trees or tree-like plants that hold onto foliage in a variety of shapes and textures. Leaves are still dropped from evergreen trees, but the amount of new, persistent leaves outnumber those that are shed when soil is seasonally dry or temperatures are cold.
Conifers, or cone-bearing trees, have evergreen foliage that is either needle-like in shape and form or scaled and linear. Needled evergreen examples include pine, spruce, fir, hemlock and yew. Scaled evergreens include junipers, false cypress and Japanese cedar, among others.
Broadleaf evergreen trees are those that have large, oval leaves, or simply do not have leaves that resemble needles or scales. Often broadleaf evergreens from temperate climates are glossy or waxy or leathery in texture to help retain moisture through winter. Tropical broadleaf evergreens possess a variety of leaf sizes and shapes. Some common broadleaf evergreen trees include the Southern magnolia, live oak, Japanese ligustrum and camellia.
Tropical broadleaf trees, such as the chocolate tree or soapberry from Tropical America, are most common where winters are mild and soil is always moist.
Although not true trees as defined by botanical growth processes in their trunks, palms commonly are dubbed "trees" because of their upright shape and large size. Palms retain their fanlike or featherlike fronds year around. Examples include the coconut palm, date palm, Florida cabbage palm, bottle palm and windmill palm.
Care Of Old Evergreen Trees
Healthy evergreen trees require little pruning regardless of age. Prune dead and damaged branches, remove suckers that impede with the canopy’s natural growth and cut away competing leaders, called water sprouts, that are growing from the base of the tree. Always irrigate your evergreen tree according to its needs rather than its age. This variation is not only dependent upon the evergreen tree’s age, but its species and natural growth habits. However, flowering evergreens that are hardy in the same climate, such as crapes and magnolias, require deep yet infrequent irrigation throughout their lifespan, regardless of age, and should never be allowed to dry out. Avoid watering the tree during wet, rainy periods, and increase the irrigation during long periods of dry, hot weather. To prevent a decline in vigor due to these nuisances, inspect your tree regularly for signs of infestation and infection. Treat signs of infestation and infection immediately to prevent permanent injury to the tree.
- "A-Z Encylopedia of Garden Plants"; Edited by Christopher Brickell and H. Marc Cathey; 2004
- "Tropical and Subtropical Trees"; Margaret Barwick; 2004
- University of California Cooperative Extension Fresco County: Tips for Growing and Maintaining Healthy Trees
- Virginia Cooperative Extension: A Guide to Successful Pruning, Evergreen Tree Pruning Calendar
- University of California The California Backyard Orchard: Fertilization
- University of California Agriculture and Natural Resources: Fertilizing Landscape Tree
- University of California IPM Online: Aphids
- University of California IPM Online: Powdery Mildew