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Dummer. ゛☀
2017年08月30日
Dummer. ゛☀
Crown canker is a fungal disease that attacks flowering dogwood trees. The disease, also known as collar rot, is caused by the pathogen Phytophthora cactorum. It can kill the trees it attacks or can leave them vulnerable to lethal attack by other pathogens. For more information on crown canker on dogwood trees, read on.
Dogwood Tree Diseases Dogwood trees suffer from a variety of diseases and conditions, most of which result in only cosmetic damage. Some are caused by improper care, such as water stress, resulting from inadequate irrigation during dry periods. Other avoidable diseases include leafspot and sun scorch, which occur when this understory tree is planted in full sun. However, two dogwood tree diseases are potentially lethal to the trees. Both are canker diseases. One, dogwood anthracnose canker, kills leaves, twigs and branches, starting in the lowest branches. It often kills the tree within three to five years.
The other deadly canker is known as crown canker of dogwood. Crown canker on dogwood trees is the most serious of the dogwood tree diseases in the eastern United States. It is caused by a canker that, over several years, girdles the tree and kills it. What are the first visible symptoms of crown canker on dogwood trees? You may not see the canker immediately on an infected tree. Look for undersized leaves of a lighter color than normal on a tree that appears stressed. Over time, twigs and branches die on one side of the tree as the disease spreads.
Dogwood Crown Canker Treatment If you take steps to prevent dogwood tree bark problems, especially wounds, you are one step ahead of the game. Prevention of wounds is easier than dogwood crown canker treatment. As with many other canker diseases, crown canker of dogwood often enters through wounds on the base of the tree. Any dogwood tree bark problems that cause a break in the bark can allow in the disease. The most important step in dogwood crown canker treatment is prevention. Take care not to wound the tree with garden tools when you are transplanting it, or lawn mowers or weed whackers after it is planted. Insects or animals can also wound the tree bark and allow the disease to enter.
Once the fungus has infected a large section of the dogwood’s base, you can do nothing to save the tree. However, if only a small area is diseased, you can try to stop its spread by cutting out the canker, removing all discolored bark and sapwood and some 5 cm of healthy bark. Use a sharp knife to perform this excision. Protect the new wound from infections by painting the area with orange shellac. Use an asphalt-base wound paint on the exposed heartwood. If the tree dies anyway, don’t replace it with another dogwood.
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Dummer. ゛☀
2017年08月30日
Dummer. ゛☀
If you’ve ever seen an elaborate Japanese pagoda, you know how the structure’s roof spreads out in symmetrical layers. The branches of pagoda dogwood are dense and layered too, and pagoda dogwood information says the trees get their common names from this branch structure. Despite its common name, the pagoda dogwood is actually an American native shrub. For more pagoda dogwood information, including tips for pagoda dogwood care, read on.
Pagoda Dogwood Information Pagoda dogwood (Cornus alternifolia) is a large shrub or small tree for a garden or backyard. Native to the American East, the pagoda dogwood is hardy in U.S. Department of Agriculture plant hardiness zones 3 through 7. It is also an attractive plant. When you are growing pagoda dogwood trees, you’ll see that the branches are tiered and horizontal, turning up slightly at the tips. Pagoda dogwood information suggests that the blossoms are also a nice addition to a landscape. Although they are small, the creamy flowers are very fragrant and bloom in 2- to 3-inch groupings in late spring. These give way to berry-like drupes, the color of blueberries that appear on crimson stalks. The fruits mature in late summer. The long, oval leaves turn purple in autumn. This dogwood is of great benefit to wildlife. The flowers attract butterflies, and the dense foliage provides excellent nesting conditions for birds, while the drupes make meals for them too.
Pagoda Dogwood Growing Conditions When you are growing pagodas, you’ll be particularly interested in tips about pagoda dogwood growing conditions. In fact, the trees have quite specific requirements. Ideal pagoda dogwood growing conditions include a sunny planting site that gets some shade during the heat of the afternoon. You’ll want to find a spot with moist, fertile soil. The soil should also be acidic and well drained. If you find a great planting location, growing pagoda dogwood trees requires less effort. That doesn’t mean that no pagoda dogwood care is required, however.
Pagoda dogwood information suggests that these plants require regular irrigation. This is especially important in areas that do not get precipitation in the summer. It also helps your pagoda dogwood if you mulch the root area regularly. This locks in the moisture and also stabilizes the soil temperature.
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Dummer. ゛☀
2017年08月30日
Dummer. ゛☀
Dogwoods are beautiful trees with striking spring flowers. They are impressive trees to have around, but not every gardener has the space or the means to take care of a large tree. Other gardeners may not live in a zone warm enough to overwinter a dogwood outside. With some skill and attention, though, you can keep a dogwood tree in a container. Keep reading to learn more about caring for potted dogwood trees.
Can I Grow Dogwood In a Container? Can I grow dogwood in a container? Technically, yes. It’s possible, but there are certain requirements to be met, and it’s not for the casual gardener. Dogwood trees have very dense, fast growing root systems that are less than ideal for container growing. They also need extremely well-draining soil, but at the same time the plants need lots of water, particularly in the first few years of life. Containers dry out quickly, so you’ll probably have to mulch heavily and water it every day or so.
How to Grow Dogwoods in a Container When growing dogwood trees in pots, it’s important to give the roots plenty of room. This means you should opt for as big of a container as you can manage. Even so, you’ll want to remove the tree from its container to prune the roots back on occasion to keep it from becoming root bound. Again, container grown dogwoods will require plenty of moisture so you’ll have to water the tree frequently. You can also add a bit of mulch to the top of the soil, which should help it retain some of that moisture.
Caring for potted dogwood trees in the winter is also tricky. The plants need cold temperatures in order to go dormant during the winter. If you want to bring it inside, it’s best to put it somewhere protected but unheated, like a shed or a garage.
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Dummer. ゛☀
2017年08月30日
Dummer. ゛☀
Evergreen dogwoods are beautiful tall trees grown for their fragrant flowers and remarkable fruit. Keep reading to learn more Cornus capitata information, including tips on evergreen dogwood care and how to grow an evergreen dogwood tree.
Cornus Capitata Information Evergreen dogwood trees (Cornus capitata) are hardy down to USDA zone 8. They are native to east and Southeast Asia but can be grown in warm climates all over the world. They can grow as high as 50 feet (15 m.) in height, though they tend to top out between 20 and 40 feet (6-12 m.). In the summer, they produce very fragrant flowers, which are very small and surrounded by 4 to 6 bracts that are often mistaken for petals. The bracts come in shades of white, yellow, and pink. These flowers give way to very distinctive fruits that are actually dozens of tiny fruits fused together. These fruits are pink to red, about an inch in diameter (2.5 cm.) and round but bumpy. They are edible and sweet, but they can cause a litter problem if the tree is planted near a walkway. The leaves are dark and evergreen, though they are sometimes known to turn red to purple and partially drop in autumn.
How to Grow an Evergreen Dogwood Tree Like many dogwood varieties, evergreen dogwood trees can thrive in both sun and shade. They do best in moist, clay to loam soil. They prefer acidity, but they can tolerate light alkalinity. They need a lot of water.
The trees are monoecious, which means they can self-pollinate. It’s important to bear in mind, however, that they will not flower for 8 to 10 years if they are grown from seed. It’s best to start the trees from cuttings if you want to see flowers or fruit within the decade.
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Dummer. ゛☀
2017年08月30日
Dummer. ゛☀
Flowering dogwoods (Cornus florida) are deciduous trees native to the eastern half of the United States. These trees can add year-round beauty to the landscape. Let’s look at how to grow dogwood trees. Flowering dogwoods range in color from white to pink or red and generally bloom for about two to four weeks in early spring. They also add summer and fall color, with rich green foliage color in summer and reddish purple leaves during fall. This is oftentimes followed by brilliant red berries in winter. Proper dogwood care will bring these lovely trees to their height of beauty.
How to Grow Dogwood Trees In their natural habitat, dogwoods are understory trees, which are generally surrounded or protected by other larger trees. Therefore, when caring for dogwood trees, this should be considered carefully before placement in the landscape. Locating these trees on the edge of wooded areas or in groups is oftentimes more suitable to their natural surroundings. They can also be used as a backdrop for azaleas or other spring-flowering shrubs. Flowering dogwoods can be grown in sun or shade; however, trees planted in partial shade generally perform better. Trees planted in full sun can be stressful, making them more susceptible to dogwood borers and heat stress. For care of flowering dogwood trees, dogwoods that are planted in full sun must also rely on frequent watering, especially during hot conditions. While dogwoods will grow in a variety of climates and soil conditions, they typically grow best in, and even prefer, well-drained, humus-rich soil that is slightly acidic.
Planting Dogwood Care Bare root and burlap dogwood trees should be transplanted in late fall or early spring. Container grown trees can be transplanted anytime of the year, provided they are watered regularly after planting. A dogwood should be planted about two-thirds the depth of its root ball. The soil should be gently mounded around the sides of the root ball. Do not place soil directly over the top of the root ball, as this should be left slightly above ground level. It is acceptable to apply a layer of mulch to help conserve water; however, for good dogwood care, keep this a couple inches away from the trunk. Be sure to water the tree thoroughly after planting and on a regular basis until the tree establishes itself.
Care of Flowering Dogwood Most dogwoods require supplemental water during summer and fall, especially during hot, dry spells. For care of flowering dogwood trees, regular watering once a week to a depth of 6 inches should suffice. However, adding a generous layer of mulch will help retain moisture, minimizing watering chores. Most established trees do not require fertilizer. However, if you do choose to fertilize young dogwoods, use only a small amount of slow-release fertilizer. Dogwood trees seldom need pruning; however, it may be necessary to remove dead or injured branches, suckers, and diseased or insect-infested parts on occasion. Shaping trees may also help keep them more attractive looking.
Flowering dogwood trees are considered “bleeders,” which means they bleed sap, if pruned during late winter. Summer is an ideal time to take care of any pruning tasks that may be needed since these plants do not bleed sap during this time. Once established in the landscape, caring for dogwood trees is relatively easy. As long as they have been planted in the proper conditions and location, the overall care of flowering dogwoods is minimal.
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Dummer. ゛☀
2017年08月30日
Dummer. ゛☀
Cypress trees are fast-growing North American natives that deserve a prominent place in the landscape. Many gardeners don’t consider planting cypress because they believe it only grows in wet, boggy soil. While it’s true that their native environment is constantly wet, once they’re established, cypress trees grow well on dry land and can even withstand occasional drought. The two types of cypress trees found in the U.S. are bald cypress (Taxodium distichum) and pond cypress (T. distichum).
Cypress Tree Info Cypress trees have a straight trunk that tapers at the base, giving it a soaring perspective. In cultivated landscapes, they grow 50 to 80 feet tall with a spread of 20 to 30 feet. These deciduous conifers have short needles with a feathery appearance. Most varieties have needles that turn brown in winter, but a few have lovely yellow or gold fall color. Bald cypress has a tendency to form “knees,” which are pieces of root that grow above the ground in odd and sometimes mysterious shapes. Knees are more common for trees grown in water, and the deeper the water, the taller the knees. Some knees reach a height of 6 feet. Although no one is sure about the function of knees, they may help the tree get oxygen when they are underwater. These projections are sometimes unwelcome in the home landscape because they make mowing difficult and they can trip passers-by.
Where Cypress Trees Grow Both types of cypress trees grow well in areas with lots of water. Bald cypress grows naturally near springs, on lake banks, in swamps or in bodies of water that flow at a slow to moderate rate. In cultivated landscapes, you can grow them in almost any soil. Pond cypress prefers still water and doesn’t grow well on land. This variety is rarely used in home landscapes because it needs boggy soil that is low in both nutrients and oxygen. It grows naturally in Southeastern wetlands, including the Everglades.
How to Care for Cypress Trees Growing cypress trees successfully depends on planting the in the right location. Choose a site with full sun or partial shade and rich, acid soil. Cypress trees are hardy is USDA zones 5 through 10. Drench the soil around the tree after planting and cover the root zone with 3 to 4 inches of organic mulch. Give the tree a good soaking every week for the first few months. Cypress trees need water most in spring when they enter a growth spurt and in fall just before they go dormant. They can withstand occasional drought once established, but it’s best to water them if you haven’t had a drenching rain for more than a month.
Wait a year after planting before fertilizing a cypress tree for the first time. Cypress trees growing in a regularly fertilized lawn don’t generally need additional fertilizer once established. Otherwise, fertilize the tree every year or two with a balanced fertilizer or a thin layer of compost in fall. Spread a pound of balanced fertilizer for each inch of trunk diameter over an area approximately equal to the spread of the canopy.
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Dummer. ゛☀
2017年08月30日
Dummer. ゛☀
Rejuvenating a cypress tree necessarily means trimming, but you have to be careful how you wield those clippers. Cutting back cypress trees too drastically results in dead wood and unattractive trees. Read on for more information on pruning cypress trees.
Can You Prune a Cypress? Cypress trees are narrow-leaf evergreens. Like other narrow-leaf evergreens, cypress do not develop new buds on the older wood. That means that cutting new shoots back to the branch may result in bare spots on the tree. On the other hand, cypress tree trimming is entirely feasible if you know what you are doing. Cypress are one of several species classified as “scale-leaf” needled evergreens. Unlike pine trees, with leaves that look like needles, cypress leaves appear more like scales. Both cypress and false-cypress are included in this category. Rejuvenating a cypress tree that is overgrown or unshapely involves trimming. Although excess pruning is destructive to a cypress, cutting back cypress trees at the right time and in the right way creates a better, stronger tree.
Rejuvenating a Cypress Tree If you are thinking of rejuvenating a cypress tree, it is important to prune at the correct time of year. Dead, broken and diseased branches should be removed as soon as possible after you notice the damage. However, pruning to shape the tree or reduce its size must wait for the appropriate season. When you are rejuvenating a cypress tree that is overgrown, begin cypress tree trimming just before new growth begins in the springtime. You can pick up the pruners again in late spring or early summer if necessary to control growth or maintain an attractive tree shape.
Tips on Cutting Back Cypress Trees The rule when pruning cypress trees is to work slowly and gently. Proceed branch by branch to determine what cuts are necessary. Cut back each overly-long branch to a branch fork with a green shoot growing from it. This is the most important rule for cutting back cypress trees: never cut all green shoots from any branch since the branch will not be able to grow more. Proceed from the underside of the branches, slanting the cuts up.
When you are pruning cypress trees, aim for a natural look by pruning some branches deeper into the foliage than others. The tree should not look “pruned” when you are done.
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Dummer. ゛☀
2017年08月30日
Dummer. ゛☀
The lemon cypress tree, also called Goldcrest after its cultivar, is a variety of Monterey cypress. It gets its common name from the powerful strong lemon scent that its branches exude if you brush against them or crush their foliage. You can start growing lemon cypress trees (Cupressus macrocarpa ‘Goldcrest’) indoors or outside. Lemon cypress care is not difficult if you know some basic rules.
Lemon Cypress Trees Lemon cypress trees come in two sizes: small and smaller. Grown outdoors in their natural habitat, the trees can grow to 16 feet tall. This is quite small for a cypress. The dwarf lemon cypress (Cupressus macrocarpa ‘Goldcrest Wilma’) is the better choice for a houseplant. This small tree usually does not grow taller than 3 feet, making it perfect for indoor containers. The tree has many admirers, thanks to its green-yellow needle-like foliage, conical growth pattern and bright fresh citrus smell. If you are thinking of growing lemon cypress, you’ll need to understand basic rules of lemon cypress care.
Lemon Cypress Care Outdoors In general, growing lemon cypress is not difficult. The trees require well-draining soil, but are not picky about whether it is loamy, sandy or chalky. They also accept acidic, neutral or alkaline soil. If you are growing lemon cypress in your backyard, you’ll need to learn about care for lemon cypress outdoors. They thrive in U.S. Department of Agriculture plant hardiness zones 7 through 10. Lemon cypress trees cannot survive shade, so you’ll need to plant your outdoor tree in a sunny spot. And don’t neglect irrigation, especially immediately after planting. During the tree’s first growing season, you’ll need to water twice a week. Watering is always an important part of care for lemon cypress outdoors. After the first year, water whenever the soil is dry. In spring, it’s time to feed the tree. Apply a standard, slow-release 20-20-20 fertilizer before new growth appears in the spring.
Lemon Cypress Houseplant Care If you decide to start growing lemon cypress trees indoors as houseplants, remember that they do best with cool indoor temperatures. Keep your thermostat in the low 60’s during winter. Perhaps the most difficult part of lemon cypress houseplant care is ensuring sufficient light. Select a window that provides good sunlight and turn the container regularly to give each side a turn. The houseplant requires 6 to 8 hours of direct sun.
Don’t forget water – essential for lemon cypress houseplant care. They won’t forgive you if you don’t give them drenching once a week – you’ll see brown needles appear. Water whenever the soil is dry.
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Dummer. ゛☀
2017年08月30日
Dummer. ゛☀
It’s hard to mistake the bald cypress for any other tree. These tall conifers with flared trunk bases are emblematic of the Florida everglades. If you are considering planting a bald cypress tree, you’ll want to read up on bald cypress information. Here are some tips on growing a bald cypress.
Bald Cypress Information A bald cypress (Taxodium distichum) isn’t actually bald. Like every living tree, it grows foliage that helps it with photosynthesis. It’s a conifer, so its foliage consists of needles, not leaves. However, unlike many conifers, bald cypress is deciduous. That means that it loses its needles before winter. Bald cypress information suggests that the needles are flat and yellow-green in summer, turning rusty orange and falling in autumn. The state tree of Louisiana, bald cypress is native to southern swamps and bayous from Maryland to Texas. If you’ve seen photos of this tree, they were likely taken in the Deep South when the tree grows in large stands in swamps, its branches draped with Spanish moss. The trunks of bald cypress flare at the base, developing knobby root growths. In swamps, these look like the tree’s knees just above the surface of the water.
Bald Cypress Growing You don’t have to live in the Everglades to start bald cypress growing, however. Given appropriate bald cypress care, these tree can thrive in drier, upland soils. Before planting a bald cypress tree, note that the trees only thrive in U.S. Department of Agriculture plant hardiness zones 4 through 9. It’s also important to make sure you have the space for bald cypress growing. These trees grow slowly, but they mature into giants. When you start planting a bald cypress tree in your backyard, try to imagine the tree several decades in the future at 120 feet tall with a trunk diameter of 6 feet or more. The other piece of bald cypress information to keep in mind involves their longevity. With appropriate bald cypress care, your tree may live 600 years.
Bald Cypress Care It’s not difficult to provide your tree the best bald cypress care if you select an excellent planting location, starting with a spot in full sun. When you are planting a bald cypress tree, ensure that the soil has good drainage but also retains some moisture. Ideally, soil should be acidic, moist and sandy. Irrigate regularly. Do yourself a favor and don’t plant these trees in alkaline soil. Although bald cypress information may tell you that the tree has no serious insect or disease issues, it is likely to get chlorosisin alkaline soils.
You’ll make Mother Nature happy if you start bald cypress growing. These tree are important to wildlife and help hold soil in place. They prevent erosion of river banks by soaking up excess water. Their thirsty roots also prevent pollutants in the water from spreading. The trees are breeding grounds for a variety of reptiles and nesting grounds for wood ducks and raptors.
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Dummer. ゛☀
2017年08月30日
Dummer. ゛☀
Growing crabapple trees in the landscape is commonplace for many homeowners, but if you haven’t yet tried it, you may be asking, “How do you grow crabapple trees?” Continue reading to find out how to plant a crabapple tree as well as how to care for a crabapple tree in the landscape.
Flowering Crabapple Trees Often called “the jewels of the landscape” flowering crabapple trees create four seasons of outstanding visual impact. In spring, the tree leafs out while the flower buds swell until they burst open to reveal fragrant blossoms in shades that range from white or pale pink to red. As the flowers fade, they are replaced by small fruit that are relished by birds and squirrels. Most crabapple trees have vibrant fall colors, and once the leaves fall, the fruit stands out against the bare or snow-covered branches. The fruit often lasts well into the winter months. The difference between an apple and a crabapple is the size of the fruit. Fruit less than 2 inches in diameter are considered crabapples, while larger fruit are called apples.
How to Plant a Crabapple Tree Choose a location in full sun with well-drained soil. Trees that are shaded develop an open canopy instead of a more attractive, dense growth habit. Shaded trees produce fewer flowers and fruit, and they are more susceptible to disease. Dig the hole for the tree as deep as the root ball and two to three times as wide. When you set the tree in the hole, the soil line on the tree should be even with the surrounding soil. Fill the hole half full with soil and water well to remove the air pockets. When the soil settles and the water drains through, finish filling the hole and water thoroughly.
How to Care for a Crabapple Tree Growing crabapple trees in the home landscape is much easier if you choose disease- and insect-resistant varieties. This allows you to focus your attention on care essentials like fertilizing, watering and pruning. Newly Planted Trees – Newly planted crabapple trees don’t need fertilization until the following spring, but they do need regular watering during their first year. Keep the soil over the tree’s root zone evenly moist. A 2- to 4-inch layer of mulch over the roots prevents the soil from drying out too quickly. Established Flowering Crabapple Trees – Crabapple trees are drought-resistant once established, but they grow best if you water them when there is less than an inch of rain in a week during summer. A 2-inch layer of mulch applied every spring provides sufficient nutrients for a crabapple tree. If you prefer, you can apply a light feeding of slow-release fertilizer instead.
Crabapple trees need very little pruning. Remove dead, diseased and damaged twigs and branches in spring and remove suckers as they appear. Pruning crabapple trees after the end of June significantly reduces the number of flowers and fruit in the following year.
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