Archive for the ‘Oaks (Quercus spp.)’ Category

Burls on Tree Trunks

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 […]

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 […]

Deciduous Trees With Yellow Fall Leaf Color

While there are numerous trees that offer wonderful yellow fall foliage, some make extraordinary specimens in residential and park landscapes. Enjoy the beautiful yellow and gold tones on a crisp fall day.  Caveat: the quality of fall color may vary from year to year. Big-leaf maple (Acer macrophyllum) – this West Coast Native grows 60-75 […]

13 Native Trees For Fall Color

1. Sweet gum (Liquidambar styraciflua) – large 60-80 feet tall tree whose fall color is a brilliant mixture of yellows, oranges, purples and reds. Zones (5b)6-9). 2. Black gum, tupelo (Nyssa sylvatica) – large 50-50 feet tall tree produces spectacular scarlet fall color. Lots of good cultivars including Green Gable®, ‘Wildfire’ and Red Rage® (Zones […]

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. […]

Downtown Street Trees With A Narrow Vertical Form

On the subject of land, Mark Twain wrote: “they’re not making any more of it”. This is particularly true in downtown urban areas where land to grow trees is usually very limited. Here are five tall trees that possess a striking vertical accent. Their upright branch habit does not take up much horizontal space. Trees […]

Trees That Age Gracefully

Trees transition from youth (seedling), middle age and old age (maturity) before requiring a chain saw and replacing. Some age gracefully, actually appreciating in $$ value. Many ginkgo, hickory, beeches, sugar maples, and Southern magnolias live 100 years plus. Oaks such as such as white (Q. alba) and live oak (Q. virginiana) mature in majesty  over several hundred years.   It’s […]