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Dummer. ゛☀
2017年09月02日
Dummer. ゛☀
Northern red oak (Quercus rubra) is a handsome, adaptable tree that thrives in nearly any setting. Planting a red oak tree requires a bit of extra preparation, but the payoff is great; this American classic provides glorious summer shade and reliable fall color for many years to come. Read on for red oak tree information, then learn how to grow a red oak tree.
Red Oak Tree Characteristics and Info Red oak is a hardy tree suitable for growing in USDA plant hardiness zones 3 through 8. This moderately fast-growing oak tree reaches mature heights of 60 to 75 feet, with a spread of 45 to 50 feet. The tree is valued for its deep root system, which makes it useful for planting near urban streets and sidewalks.
How to Grow a Red Oak Tree Planting a red oak tree is best done in spring or fall so the roots have time to settle in before the arrival of hot, dry weather. Select a planting space carefully so the tree won’t interfere with buildings or power lines. As a general rule, allow at least 20 feet in each direction. Ensure the tree is exposed to at least six hours of direct sunlight every day. In its natural environment, red oak has a symbiotic relationship with various fungi, which provides the roots with moisture and minerals. The best way to replicate this natural soil environment is to dig generous amounts of manure and compost into the soil before planting. This step is especially important in urban areas where the soil may be depleted.
Plant the tree in a hole at least twice as wide as the root ball, then fill the hole with a soil/compost mixture. Water the tree deeply and slowly to ensure the area around the root ball is saturated. A thick layer of bark mulch will keep the roots cool and moist. Protect young red oak trees with a fence or cage if you have hungry rabbits or deer in the neighborhood.
Care of Red Oak Trees Care of red oak trees is minimal, but a new tree requires regular moisture, especially during hot, dry weather. Water the tree deeply once every week in the absence of rainfall. Established trees are relatively drought tolerant. Treat young red oak trees with a commercial fungicide if you notice powdery mildew during warm, humid weather. Watch for aphids, which are usually easy to remove by spraying the foliage with a strong stream of water. Otherwise, use an insecticidal soap spray.
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Dummer. ゛☀
2017年09月02日
Dummer. ゛☀
Almost everyone who lives near oak trees has seen the small balls hanging in the tree branches, yet many still may ask: “What are oak galls?” Oak apple galls look like small, round fruit but they are actually plant deformities caused by oak apple gall wasps. The galls generally do not damage the oak tree host. If you want to know how to get rid of oak galls, read on for oak apple gall treatment.
Oak Apple Gall Information So what are oak galls? Oak apple galls appear in oak trees, most often black, scarlet and red oaks. They get their common name from the fact that they are round, like small apples, and hang in the trees. Oak apple gall information tells us that galls are formed when a female oak apple gall wasp lays eggs in the central vein on an oak leaves. When the larvae hatch, chemical and hormone interaction between the wasp eggs and the oak causes the tree to grow the round gall.
Galls are essential to developing oak apple gall wasps. The gall provides a safe home as well as food for the young wasps. Each gall contains only one young wasp. If the galls you see are green with brown spots, they are still forming. At this stage, the galls feel a little rubbery. The galls get bigger as the larvae get bigger. When the galls dry out, the oak apple gall wasps fly from small holes in the galls.
Oak Apple Gall Treatment Many homeowners assume that the galls damage the oak trees. If you think so, you’ll want to know how to get rid of oak galls. It is true that oak trees look odd after their leaves fall and the branches are hung with galls. However, the oak apple galls do not injure the tree. At the worst, a severe infestation might make leaves fall early.
If you still want to know how to get rid of oak gall wasps, you can rid the tree of galls by snipping them off with a sterilized pruner before they are dry.
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Dummer. ゛☀
2017年09月02日
Dummer. ゛☀
If you want a graceful, spreading shade tree that is an American native, live oak (Quercus virginiana) might be the tree you are looking for. Live oak tree facts give you some idea of how impressive this oak might be in your backyard. The tree grows some 60 feet tall, but the strong, sinuous branches can spread to 120 feet wide. Read on for further information about how to grow a live oak tree and live oak tree care.
Live Oak Tree Facts If you are thinking of a live oak tree growing in your garden, consider the size, shape and other live oak tree facts before you jump in. With its deep, inviting shade, the live oak looks like it belongs in the Old South. It is, in fact, the state tree of Georgia. This mighty tree’s crown is symmetrical, rounded and dense. The leaves grow in thickly and hang on the tree until spring, when they yellow and fall. Its beauty aside, the live oak is a tough, enduring specimen tree that can live for several hundred years if planted and cared for correctly. However, the tree is vulnerable to the fatal oak wilt disease, spread by insects and infected pruning tools.
Live Oak Tree Growing Learning how to grow a live oak tree is not difficult. Perhaps, the most important thing is finding a site with sufficient space to accommodate the tree at its mature size. In addition to the height of the tree and spread of the branches, the trunk itself can grow to 6 feet in diameter. The wide surface roots might in time lift sidewalks, so plant it away from the house. The live oak tree is undemanding. You can start a live oak tree growing in partial shade or sun. And don’t fret about soil. Although live oaks prefer acidic loam, the trees accept most types of soil, including sand and clay. They grow in alkaline or acidic soil, wet or well-drained. You can even grow live oak by the ocean, as they are tolerant of aerosol salt. Live oaks resist strong winds and are drought tolerant once established.
Caring for Live Oaks When you get your live oak tree growing, you need to think about live oak care. This includes regular irrigation while the tree is establishing its root system. It also includes pruning. It is critical for this giant oak to develop a strong branch structure while it is young. Prune out multiple leaders to leave one trunk, and eliminate branches that form sharp angles with the trunk. Caring for live oaks properly means pruning the trees each year for the first three years. Never prune in early spring or the first month of summer to avoid attracting the insects that spread oak wilt disease.
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Dummer. ゛☀
2017年09月02日
Dummer. ゛☀
If you think your yard is too small for oak trees, think again. Columnar oak trees (Quercus robur ‘Fastigiata’) offer the magnificent green lobed foliage and ridged bark that other oaks have, without taking up all that space. What are columnar oak trees? They are slow-growing, slender oaks with a tight, upright and narrow profile. Read on for more columnar oak information.
What are Columnar Oak Trees? These unusual and attractive trees, also called upright English oak trees, were first found growing wild in a forest in Germany. These types of columnar oaks were propagated by grafting. Columnar oak tree growth is moderately slow and the trees grow up, not out. With these trees, you don’t have to worry about the spreading lateral branches you associate with other oaks. Columnar oak trees might grow to 60 feet tall, but the spread will remain about 15 feet. The dark green leaves turn brown or yellow in autumn and remain on the tree for months before they fall in winter. The trunk of the columnar oak is covered in dark brown bark, deeply ridged and very attractive. The tree has small acorns hanging on the branches most of the winter that attract squirrels.
Columnar Oak Information These ‘fastigata’ types of columnar oaks are easy-care trees with outstanding ornamental qualities. Because the columnar oak tree growth direction is up, not out, they are useful in areas where you don’t have room for wide trees; the crown of the columnar oak remains tight and no branches break out of the crown and wander out from the trunk. Ideal columnar oak tree growth conditions include a sunny location. Plant these oaks in direct sun on well-drained acidic or slightly alkaline soil. They are extremely adaptable and very tolerant of urban conditions. They also tolerate drought and aerosol salt.
Caring for Columnar Oak Trees You will find that caring for columnar oak trees is not difficult. The trees tolerate drought, but do best with occasional irrigation. These are good trees for cooler climates. They thrive in U.S. Department of Agriculture plant hardiness zones 4 or 5 through 8.
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Dummer. ゛☀
2017年09月02日
Dummer. ゛☀
Sudden oak death is a deadly disease of oak trees in coastal areas of California and Oregon. Once infected, trees can’t be saved. Find out how to protect oak trees in this article.
What is Sudden Oak Death? The fungus that causes sudden oak death (Phytophthora ramorum) results in a quick death for tanoaks, California black oaks, and live oaks along the coast of California and Oregon. The fungus also infects the following landscape plants: Bay laurel Huckleberry California buckeye Rhododendron
Here are the symptoms of sudden oak death: Cankers on the stems and branches. Leaves in the crown that turn pale green, then yellow, then brown. Cankers that bleed and ooze. In the alternative species, it causes non-fatal leaf spot or twig dieback instead of the bleeding cankers it causes in oaks. Sudden oak death can infect other species of oak, but those species don’t grow in habitats where the fungus is found, so for now, it isn’t a problem. Since P. ramorum has been identified in nursery stock in California, Oregon and Washington, there is a possibility of the disease spreading to other parts of the country.
Sudden Oak Death Information This disease is always fatal in susceptible oak species and there is no cure. Sudden oak death treatment focuses on prevention and protection. Here are a few things you can do to protect your susceptible oaks: Allow 15 feet between the trunk of an oak tree and other susceptible species, such as bay laurel and rhododendron. Spray the fungicide Agri-fos to protect oak trees. This is a preventative spray, not a cure. Don’t plant new oak trees in areas with known infection.
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Dummer. ゛☀
2017年09月02日
Dummer. ゛☀
Water oaks are native to North America and found across the American South. These medium sized trees are ornamental shade trees and have an ease of care that makes them perfect in the landscape. Try growing water oak trees as street plants or primary shade trees, but be aware that these plants are short lived and can be assumed to survive 30 to 50 years. Read the article below for more water oak information.
Water Oak Information Quercus nigra is a tolerant plant that can grow in partial shade or sun to full sun. These elegant trees are deciduous to semi-evergreen and an important part of ecosystems from New Jersey to Florida and west to Texas. Water oaks grow at a fantastic rate of up to 24 inches per year. Caring for a water oak is easy, but it is a weak wooded tree prone to many diseases and insect pests.
Water oaks produce copious quantities of acorns, which are a favorite food of squirrels, raccoons, turkeys, pigs, ducks, quail and deer. Deer also browse young stems and twigs in winter. The trees tend to develop hollow stems, which are habitat for a host of insects and animals. In the wild, it is found in lowlands, flood plains and near rivers and streams. It has the capacity to thrive in compact or loose soil, provided there is adequate moisture. Water oaks may be short lived but their rapid growth makes them an excellent shade tree for decades. However, special water oak tree care when young is essential to produce a strong scaffold. Both pruning and staking may be necessary to help the tree develop a sturdy skeleton.
Growing Water Oak Trees Water oaks are so adaptable they are often used as residential, reclamation or even drought zone trees. They may be planted in areas with pollution and poor air quality and the tree still thrives. The trees are reliably hardy in United States Department of Agriculture zones 6 to 9. Water oaks get 50 to 80 feet tall with a nice cone shaped crown. Bark ages to brownish black and thickly scaled. Male flowers are insignificant but female catkins appear in spring and become wide ½ inch long acorns. The leaves are oblong, spatulate and deeply tri-lobed or entire. Foliage may grow 2 to 4 inches long. These trees are extremely adaptable and, once established, caring for a water oak is reduced to handling any pest or disease issues and providing supplemental water during extremely dry periods.
Water Oak Tree Care Water oaks must be trained when young to prevent the crotch from splitting due to poor collar formation and the weight of the side limbs. Young trees should be trained to a central trunk for best plant health. The rapid growth of the plant contributes to its weak wood, which is often hollow by its 40th year. Provide young trees with plenty of water to ensure good cell development and thick wood. Oaksare host to a number of pest and disease issues. Caterpillars, scale, galls, and borers are the insects of most concern.
Oak wilt is the most serious disease but many fungal issues are often present. These might include powdery mildew, canker, leaf blight, anthracnose, and fungal leaf spot. A common deficiency in iron causes chlorosisand yellowing of the leaves. Most issues aren’t serious and can be combated by good cultural care.
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Dummer. ゛☀
2017年09月02日
Dummer. ゛☀
“Today’s mighty oak is just yesterday’s nut, that held its ground,” said author David Icke. Pin oak trees are mighty oaks that have held their ground as a fast growing, native shade tree in the eastern part of the United States for hundreds of years. Yes, that’s right, I did just use “fast growing” and “oak” in the same sentence. Not all oaks are as slow growing as we generally think they are. Continue reading to learn about pin oak growth rate and using pin oaks in landscapes.
Pin Oak Information Native east of the Mississippi River and hardy in zones 4-8, Quercus palustris, or pin oak, is a large full, ovate shaped tree. With a growth rate of 24 inches or more per year, it is one of the faster growing oak trees. Tolerant of wet soils, pin oak trees usually grow 60-80 feet high and 25-40 feet wide – though in the right soil conditions (moist, rich, acidic soil), pin oaks have been known to grow over 100 feet tall. A member of the red oak family, pin oaks will not grow in areas of high elevation or on slopes. They are usually found in damp lowlands and near rivers, streams or lakes. Pin oak acorns are often dispersed far from the parent plant and germinated by spring flooding. These acorns, as well as the tree’s leaves, bark and flowers, are a valuable food source to squirrels, deer, rabbitsand various game and songbirds.
Growing Pin Oaks in Landscapes During the summer, pin oak trees have dark green, glossy leaves that turn a deep red to bronze color in the fall, and hang on throughout winter. The beautiful foliage hangs from thick, dense branches. Having a rather ovate shape that turns more pyramidal with age, pin oaks’ lower branches hang down, while the middle branches reach out horizontally and the upper branches grow upright. These pendulous lower branches can make pin oak a not-so-good choice for street trees or small yards. What makes pin oak an excellent tree for large landscapes is its quick growth, beautiful fall color and winter interest. It also has the ability to provide dense shade, and its shallow fibrous roots make planting a pin oak tree easy. On young trees, the bark is smooth, with a red-gray color. As the tree ages, the bark becomes darker gray and deeply fissured.
Pin oaks can develop iron chlorosis if soil pH is too high or alkaline, which causes leaves to turn yellow and drop prematurely. To correct this, use acidic or iron rich soil amendments or tree fertilizers. Other problems pin oaks can develop are: Gall Scale Bacterial leaf scorch Oak wilt Borers Gypsy moth infestations Call a professional arborist if you suspect any of these conditions with your pin oak.
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Dummer. ゛☀
2017年09月02日
Dummer. ゛☀
White oak trees (Quercus alba) are North American natives whose natural habitat extends from southern Canada down to Florida, over to Texas and up to Minnesota. They are gentle giants that can reach 100 feet in height and live for centuries. Their branches provide shade, their acorns feed wildlife, and their fall colors dazzle everyone who sees them. Keep reading to learn some white oak tree facts and how to include white oak trees in the landscape of your home.
White Oak Tree Facts White oak trees get their name from the whitish color of the undersides of their leaves, distinguishing them from other oaks. They are hardy from USDA zone 3 through 9. They grow at a moderate rate, from 1 to 2 feet per year, reaching between 50 and 100 feet tall and 50 to 80 feet wide at maturity. These oak trees produce both male and female flowers. The male flowers, called catkins, are 4-inch long yellow clusters that hang down from the branches. The female flowers are smaller red spikes. Together, the flowers produce large acorns that reach over an inch long. The acorns are a favorite of a wide variety of native North American wildlife. In the fall, the leaves turn striking shades of red to deep burgundy. Especially on young trees, the leaves may stay in place all through the winter.
White Oak Tree Growing Requirements White oak trees can be started from acorns sown in the fall and heavily mulched. Young seedlings can also be planted in the spring. White oak trees have a deep taproot, however, so transplanting after a certain age can be very difficult. White oak tree growing conditions are relatively forgiving. The trees like to have at least 4 hours of direct sunlight per day, though in the wild young trees will grow for years in the forest understory.
White oaks like deep, moist, rich, slightly acidic soil. Because of their deep root system they can tolerate drought reasonably well once they are established. They do not, however, do well in poor, shallow or compacted soil. Plant the oak tree somewhere where the soil is deep and rich and the sunlight is unfiltered for the best results.
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Dummer. ゛☀
2017年09月02日
Dummer. ゛☀
Oak leaf gall mites are more of a problem for humans than for oak trees. These insects live inside the galls on oak leaves. If they leave the galls in search of other food, they can be a true nuisance. Their bites are itchy and painful. So exactly what are oak leaf mites? What is effective in treating for oak mites? If you want more information on how to get rid of oak mites, also called oak leaf itch mites, read on.
What are Oak Leaf Mites? Oak tree gall mites are tiny parasites that attack gall larvae on oak leaves. When we say tiny, we mean tiny! You may not be able to spot one of these mites without a magnifying glass. The female and male oak tree gall mites mate. Once the females are fertilized, they enter the gall and paralyze the larvae with their venom. The female mites then feed on the larvae until their offspring emerge. An entire generation of oak mites can emerge in a single week, which means that the mite population can swell rapidly. Once the oak tree gall mites have eaten the gall larvae, they leave in search of other food. Even if they don’t run out of food, mites may leave the galls. They may fall from the tree or be blown off by a breeze. This usually happens late in the season when the mite population is very large. Some 300,000 mites can fall from each tree every day.
Oak Mite Control Oak tree gall mites can enter a house through open windows or screens and bite people inside. More often, however, the mites bite people while working outdoors in the garden. The bites usually occur on the upper body or wherever clothing is loose. They are painful and itch a lot. People who are not aware of oak tree gall mites think they have been bitten by bed bugs. You might think that spraying the oak tree would be an effective oak mite control, but this is not the case. The oak tree gall mites actually live inside the galls. Since tree sprays do not penetrate the galls, the mites are safe from sprays.
If you are wondering how to get rid of oak mites, there is no perfect solution. You can try to exercise oak mite control by using DEET, a commercially available mosquito and tick repellent. But in the end, you can only protect yourself best by being vigilant. Stay away from oak trees with galls toward the end of summer. And when you do go into the garden or near the trees, shower and wash your clothes in hot water when you come in from gardening.
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Dummer. ゛☀
2017年09月02日
Dummer. ゛☀
Mighty and majestic, the bur oak (Quercus macrocarpa) is a survivor. Its massive trunk and rough bark help it exist in a very broad natural range in a variety of habitats – from bottomlands to dry uplands. What is a bur oak? Read on for bur oak information and tips on bur oak care.
What is a Bur Oak? Bur oaks, also called mossycup oak, are decidedly impressive oak trees native to North America. They grow in the wild in central and eastern sections of the continent. The common names comes from a mossy scale, or bur, on the acorn cup rim.
Bur Oak Information Bur oak trees are medium to large sized trees. They are deciduous members of the white oak group and grow to heights between 60 and 150 feet tall (18 to 46 m.). If you are thinking of planting a bur oak, you’ll want to take height into account when selecting a site. Keep in mind that the trees also have broad, rounded crowns. Bur oak trees produce yellow catkin flowers in springtime, but they are not particularly showy. The acorns are oval with fringed cups, and offer a good food source for wildlife, including both birds and mammals. Don’t expect brilliant fall color in bur oak tree leaves. The green leaves turn a dull yellow-brown before they fall.
Planting a Bur Oak Planting a bur oak is only a good idea for homeowners with very large backyards, given the size of the trees. The massive oak grows best in U.S Department of Agriculture zones 3 through 8. Be sure you site the tree with enough room to grow and in a permanent location. Bur oak information says that these native trees can live up to 300 years. If you do decide to start planting a bur oak, site the tree in full direct sun. Be sure the tree gets at least six hours of unfiltered sunlight every day. For best bur oak care, plant the tree in soil that is well drained and loamy. It will grow in either acidic or alkaline soil, and tolerates sandy, wet and clay soils too.
And speaking of bur oak care, don’t forget to water the tree regularly, especially during its first year in your garden. Bur oak trees have some drought tolerance, but they will grow faster and healthier with moderate moisture. Note that bur oak trees tolerate city smoke and other air pollutants as well as compacted soil. They are often used as shade tree on U.S. city streets.
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