An unusual swelling on trunks of trees and occasionally on large branches are “burls”. They’re round, swollen-looking growths on tree trunks and large scaffold branches. Should or shouldn’t you be concerned? Burls are not uncommon and can be found on cherry, maple, oak, buckeye, ash, willow, locust and walnut in Eastern forests. Root burls may […]
Archive for the ‘Oaks (Quercus spp.)’ Category
Three Hybrid Oaks Grow Tall And Narrow
Where space is limited, such as along a narrow thoroughfare or snuggled up near a downtown building, here are three (plus two others pictured here) columnar oaks that you can depend upon. Beacon® is a hybrid swamp white oak (Quercus bicolor) discovered by famed plantsman Dr. Michael Dirr and introduced by J. Frank Schmidt Nursery in […]
Why My Tree Turns Yellow in Summer
Leaves of some landscape trees turn yellowish- green color in the summer. The common cause for this malady is a lack of minor nutrients (“micronutrients”) that are essential for plant growth. These nutrients are available in the soil in very small quantities. Nutrient deficiencies are not common, except in the high pH soils, particularly the […]
Bird Friendly Trees And Shrubs
Birds visit trees, shrubs, and vines for five things: fruits (berries), sweet nectar (flowers), insects (particularly caterpillars), nuts and seeds, and shelter. This list is a compilation from the North Carolina and Tennessee chapters of the Audubon Society of ornamental plants common in the Southern Appalachian region. Trees and Shrubs (26) Maples (Acer spp.) Downy Serviceberry […]
Shumard Oak
Shumard Oak (Quercus shumardii) is stately landscape tree in the red or black oak group (USDA hardiness zones 5-8). The species is native to moist bottomlands and slopes of the southeastern U.S. Typically, Shumard grows at a moderately fast rate to a height of 40-60 feet (30-40 feet wide) in the landscape. It has a […]
Plant Disease Warning: Phytophthora ramorum
Known as “sudden oak death”, this serious plant disease (Phytophthora ramorum) (Pr) from the West Coast kills oak and other species of trees. It has caused devastating effects on the oak populations in California, Oregon, and Washington, and is also present in Europe. Symptoms include bleeding cankers on the tree’s trunk and dieback of foliage. […]