![]() Growth Rate: They are slow growers (10 to 15 feet in 10 to 12 years) and can live several hundred years. They are pyramidal in youth, with a rounded head in maturity. Mature Height/Spread: White oaks grow 50 to 100 feet tall, with an equal or greater spread. For more information on problems with oaks, refer to the fact sheet HGIC 2006, Oak Diseases & Insect Pests. Disease and insect control is generally not warranted on large trees. Chlorosis (yellowing of the leaves) can occur from iron deficiency in high-pH soils. Severe mistletoe infestations may damage some oaks. Oak wilt occurs in only six counties in South Carolina: Chesterfield, Kershaw, Lancaster, Lee, Darlington and Barnwell. Problems include galls, scale insects, borers, leaf spots, bacterial leaf scorch and oak wilt. ![]() ![]() Problems: Oaks are subject to many pests, depending on the species. Evergreens work well in screens and, because they are often smaller, work well on smaller properties. Most oaks need considerable space, and they are generally not well-suited for small home grounds. Landscape Use: Oaks are valuable as shade trees, specimens and street trees. They bear acorns that mature that same fall. The “white oaks” have leaves with rounded ends and points, with no bristly tips. This group includes water oak, willow oak, black oak, Japanese evergreen oak, Southern red oak and pin oak. The “red oak” group is characterized by having bristles or points on the leaf and acorns that mature in two growing seasons and sprout in the spring after maturity. Leaves are variable, depending on the species.Įvergreen species have dark, glossy leaves. The deciduous species are large and often attractive with their massive trunks and limbs, even in winter without their leaves. Growth Rate: Growth rate depends on the species.Ornamental Features: Each species brings its own value to the landscape. Sizes range from the smaller Japanese evergreen oak (20 to 30 feet tall) to the massive white oak (50 to 100 feet tall). Mature Height/Spread: The height and spread varies depending on the species. There is a brief discussion of southern red oak ( Q. There are many species common throughout the state, but this fact sheet will focus on the following: white oak ( Quercus alba), water oak ( Q. In general, the deciduous species are more common from the Midlands north, while the evergreens favor conditions in the Coastal Plains. Wendy VanDyk Evans, Oaks ( Quercus species) are important trees in South Carolina. This means sometimes they are outcompeted by other trees like the elm or sweetgum.Mature water oak ( Quercus nigra) leafing out in spring. This allows the tree to conserve resources and energy.Īn interesting fact about Pin Oaks is that they are intolerant to shade. It begins shedding its leaves in October in preparation for a long winter. The Pin Oak follows a similar annual cycle to many other north american trees. It takes another twelve months before the fallen acorn has reached its full ripeness, making it vulnerable to rodents and small animals who want to snack on it. ![]() The Zygote does not reach maturity as an acorn until a few months later, when it falls off of the tree. Then, pollen tube formation begins and there is double fertilization. The pollen capsules released by the catkins travel through the air to reach the ovaries of neighboring Pin Oaks or of twigs on the same tree, as Pin Oaks are monoecious (aka hermaphroditic). The male gametophyte, or the catkin, reaches maturity at a different time of the year than the female ovaries.
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