动态第837页 - 绿手指 - 养花技巧、花生病了怎么办、花园打理和设计

2017年08月31日

Common in older landscapes because of their quick growth, even the slightest breeze can make the silver undersides of silver maple trees look like the whole tree is shimmering. Because of its wide use as a fast-growing tree, most of us have a silver maple or a few on our urban blocks. In addition to their use as fast-growing shade trees, silver maples were also widely planted in reforestation projects. Continue reading to learn more silver maple tree information.[图片]Silver Maple Tree Information Silver maples (Acer saccharinum) prefer to grow in moist, slightly acidic soil. They are moderately drought tolerant, but are more recognized for their ability to survive in standing water for long periods of time. Because of this water tolerance, silver maples were often planted along river banks or edges of other waterways for erosion control. They can tolerate high water levels in spring and receding water levels in midsummer.[图片]In natural areas, their early spring blooms are important to bees and other pollinators. Their prolific seeds are eaten by grosbeaks, finches, wild turkeys, ducks, squirrels and chipmunks. Its leaves provide food for deer, rabbits, cecropia moth caterpillars and white tussock moth caterpillars. Growing silver maple trees are prone to forming deep holes or cavities that provide homes for raccoons, opossums, squirrels, bats, owls and other birds. Near waterways, beavers often eat silver maple bark and use their limbs for building beaver dams and lodges.[图片]How to Grow Silver Maple Trees Hardy in zones 3-9, silver maple tree growth is about 2 feet or more per year. Their vase-shaped growth habit can top out at anywhere from 50 to 80 feet tall depending on location and can be 35 to 50 feet wide. While they were once widely used as quick growing street trees or shade trees for landscapes, silver maples are not so popular in recent years because their brittle limbs are prone to breakage from strong winds or heavy snow or ice. Silver maple’s large vigorous roots can also damage sidewalks and driveways, as well as sewer and drain pipes. The soft wood that is prone to forming holes or cavities can also be prone to fungus or grubs.[图片]Another drawback to silver maples is that their prolific, winged seed pairs are highly viable and seedlings will quickly sprout up in any open soil without any special requirements, like stratification. This can make them a pest to agriculture fields and quite annoying to home gardeners. On the positive side, this makes silver maples very easy to propagate by seed. In recent years, red maples and silver maples have been bred together to create the hybrid Acer freemanii. These hybrids are fast growing like silver maples but more durable against strong winds and heavy snow or ice. They also have prettier fall colors, usually in reds and oranges, unlike the yellow fall color of silver maples.[图片]If planting a silver maple tree is a project you’d like to undertake but without the downsides, then opt for one of these hybrid types instead. Varieties in the Acer freemanii include: Autumn Blaze Marmo Armstrong Celebration Matador Morgan Scarlet Sentinel Firefall

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2017年08月31日

If you are seeking a beautiful medium to large sized maple tree, look no further than the Norway maple. This lovely plant is native to Europe and western Asia, and has become naturalized in some areas of North America. In some regions, growing a Norway maple tree can be a problem where it self-seeds and displaces other native vegetation. With good care and careful management, however, this tree can be a good shade or standalone specimen. Learn how to grow Norway maple trees and enjoy their ornamental classic look and ease of care.[图片]Norway Maple Tree Info Maple trees are classics of the landscape genre. Norway maple (Acer platanoides) has made its own place in the culture and is a common shade tree that resembles sugar maples. The plant has several seasons of interest and retains a compact crown and dense growth. Norway maple has high tolerance to pollution and is adaptable to many soils including clay, sand or acidic conditions. This elegant tree is a useful addition to the landscape, provided some care is taken to minimize seedlings, which are rampant the following season. The Norway maple was introduced by John Bartram to Philadelphia in 1756. It quickly became a popular shade tree due to its adaptability and attractive form. However, in some areas of the United States, it has begun to replace native populations of maples and may be invasive from the northeastern U.S. south to Tennessee and Virginia. It is also a plant of concern in the Pacific Northwest.[图片]Trees can grow up to 90 feet in height and have nicely rounded, compact crowns. Young trees have smooth bark, which becomes black and furrowed with age. The fall color is bright gold but one of the types of Norway maple trees, Crimson King, develops deep reddish fall tones. One of the important items of Norway maple tree info is regarding its root system. Roots can become a hazard due to the huge number of surface roots the plant produces.[图片]How to Grow Norway Maple Trees Acer platanoides is hardy to United States Department of Agriculture zones 4 to 7. This remarkably adaptable tree performs well in either full sun or partial shade. While it prefers well drained, moist soil, it is drought tolerant for short periods of time, although some leaf drop may occur. Growing a Norway maple tree may require some training when the tree is young to help it develop a good strong central leader and stout scaffold. Plants transplant easily with little effect on the root system or foliage. Norway maple has good resistance to storm and ice damage and has a vigorous growth rate. These trees, if carefully managed, can quickly become attractive focal points of the shade garden.[图片]Norway Maple Tree Care One of the highlights of Norway maple tree care is managing the samaras, or seed fruits. These winged fruits can catch the wind and navigate far away from the parent tree. They germinate readily and can become an issue in rural settings or near native woods. Pruning at the end of the season, just before the samaras turn brown, can prevent wild seedlings from becoming a pest.[图片]Other management is limited to supplemental watering in hot summers, once a year fertilizing with a good balanced food in early spring, and removing any damaged or diseased wood. These trees have few of the classic maple issues and are quite fine if left alone most of the time. While this adds to their popularity, caution should be observed in some regions where the plant is considered invasive.

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2017年08月31日

Norway maple trees (Acer platinoides) are wonderful shade trees in the garden. However, they produce many seeds and propagate so easily that they readily escape cultivation. In the wild, Norway maple shades out native plants. Controlling Norway maples is much more difficult than growing them. For information about Norway maple control, read on.[图片]Norway Maple Weed Trees Norway maples are tall, attractive trees that taller than 65 feet. They have dense, rounded canopies that offer deep shade beneath. The trunk of the Norway maple is mottled gray and smooth. The color and texture of the bark contrasts with the dark-green, deeply lobed leaves that grow to six inches long and five inches wide. Both the leaves and the twigs “bleed” a milky sap when cut or broken. The trees produce upright clusters of yellowish green flowers that bloom in May. The flowers give way to winged fruit called samaras. These samara are packed with seeds, and the wind blows them far and wide, allowing the seeds to spread. They germinate promptly, even in full shade. This makes controlling Norway maple difficult.[图片]These maples are called “Norway maple weed trees” because they spread so rapidly. Given the vast numbers of seeds produced by the tree and the ease with which they grow, Norway maple weed trees in your backyard spread quickly to nearby forests and fields. Though not native to this country, Norway maple trees are currently found in half the states, and they are considered invasive in most of them.[图片]How to Manage a Norway Maple Experts addressing the question of how to manage a Norway maple recommend against planting the tree in new developments. Controlling Norway maple populations is a real challenge. If the only new trees are seedlings and saplings, Norway maple control can be effected by weeding these out by hand. A weed wrench pulls Norway maples out of the ground with most of their roots intact. If you want to know how to manage a Norway maple sapling, use pruning loppers to fell the young tree. Then apply an herbicide to the exposed stump.[图片]In an area where the trees have already spread into the wild, one method of Norway maple control is pruning out seed-bearing branches each year. This is a good solution for an area under long-term resource management. Pruning stops the tree’s spread without leaving immediate holes in the forest structure. Removing trees is another option. It’s a better option where the natural resource management is short term rather than long term. Girdling big trees by cutting deeply into the bark around the trunk will effectively kill them. Once the trees are removed, it is critical to act quickly to transplant native trees into the spaces the Norway maples used to occupy.[图片]Perhaps the best way to do Norway maple control is opting to plant a different type of tree. Native trees like red maple and sweetgum are good alternatives.

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2017年08月31日

What is a boxelder tree? Boxelder (Acer negundo) is a fast-growing maple tree native to this country. Although drought resistant, boxelder maple trees do not have a lot of ornamental appeal to homeowners. Read on for additional boxelder tree information.[图片]Boxelder Tree Information What is a boxelder tree? It’s an easy-to-grow, very adaptable maple. The wood of boxelder maple trees is soft and has no commercial value. Boxelder maple tree facts tell us that this maple usually grows on river banks or near water in the wild. These trees help to shelter wildlife and stabilize stream banks. However, in urban areas, they are considered a type of weed. Some boxelder maple trees are male and some are female. The females bear blossoms that turn bright green when they are pollinated. They can add color to your spring garden. However, most experts do not recommend that gardeners begin boxelder maple tree growing. Nor are they very popular garden plants.[图片]Boxelder maple tree facts tell us that these trees have brittle, weak wood. That means that the trees break easily in wind and ice storms. In addition, boxelder maple tree information confirms that the tree seeds, found in winged samaras, germinate very easily. This can make them a nuisance in a private garden. Finally, female trees attract boxelder bugs. These are insects some ½ inch long that don’t cause many problems in the garden. However, boxelder bugs are problematic as winter comes on. They like to overwinter indoors, and you’ll likely find them inside your house.[图片]Boxelder Maple Tree Growing If you decide to plant one of these trees, you’ll need to get information about boxelder maple tree growing. Given the tree’s tolerance and adaptability, boxelder maple trees are not difficult to grow in the proper climate. These trees can grow in almost any mild, cool or cold region in the United States. In fact, they thrive in U.S. Department of Agriculture plant hardiness zones 2 through 9.[图片]Plant your boxelder near a stream or river, if possible. They tolerate most soils, including sand and clay, growing happily in dry or wet soil. However, they are sensitive to salt spray.

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2017年08月31日

Striped maple trees (Acer pensylvanicum) are also known as “snakebark maple.” But don’t let this scare you away. This lovely little tree is an American native. Other species of snakebark maple exist, but Acer pensylvanicum is the only one native to the continent. For more striped maple tree information and tips for striped maple tree cultivation, read on.[图片]Striped Maple Tree Information All maples are not soaring, graceful trees with snow-white bark. According to striped maple tree information, this tree is a shrubby understory maple. It can be grown as a large shrub or a small tree. You’ll find this maple in the wild from Wisconsin to Quebec, from the Appalachians into Georgia. It is native to the rocky forests in this range. These trees usually grow from 15 to 25 feet tall, although some specimens get to 40 feet tall. The canopy is rounded and sometimes the very top is flattened. The tree is much loved because of the unusual and interesting trunk. Striped maple tree bark is green with vertical white striping. The stripes sometimes fade as the tree matures, and the striped maple tree bark turn reddish brown.[图片]Additional facts about striped maple trees include their leaves which can grow quite long, up to 7 inches. Each one has three lobes and looks a little like a goose foot. The leaves grow in pale green with pink overtones, but turn a deep green by summer’s end. Expect another color change in autumn when the foliage turns canary yellow. In May, you’ll see drooping racemes of tiny yellow flowers. These are followed by winged seed pods as summer passes. You can use the seeds for striped maple tree cultivation.[图片]Striped Maple Tree Cultivation If you are thinking of planting striped maple trees, they grow best in shaded areas or woodland gardens. As is typical with understory trees, striped maple trees prefer a shady location and cannot grow in full sun. Striped maple tree cultivation is easiest in well-drained soil. The soil need not be rich, but the trees thrive in moist soils that are slightly acidic.[图片]One good reason for planting striped maple trees is to benefit local wildlife. This tree serves an important role as a browse plant for wildlife. Planting striped maple trees results in food for various animals, including red squirrels, porcupines, white-tailed deer and ruffed grouse.

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2017年08月31日

Jack Frost maple trees are hybrids developed by Oregon’s Iseli Nursery. They are also known as Northwind maples. The trees are small ornamentals that are more cold hardy than regular Japanese maples. For more Northwind maple information, including tips for growing Northwind maples, read on.[图片]Northwind Maple Information Jack Frost maple trees are crosses between Japanese maples (Acer palmatum) and Korean maples (Acer pseudosieboldianum). They have the beauty of the Japanese maple parent, but the Korean maple’s cold tolerance. They were developed to be extremely cold hardy. These Jack Frost maple trees thrive in USDA zone 4 in temperatures down to -30 degrees Fahrenheit (-34 C.). The official cultivar name for Jack Frost maple trees is NORTH WIND® maple. The scientific name is Acer x pseudosieboldianum. These trees can be expected to live for 60 years or more.[图片]The Northwind Japanese maple is a small tree that usually doesn’t get taller than 20 feet (6 m.). Unlike its Japanese maple parent, this maple can survive in to zone 4a without any signs of dieback. Northwind Japanese maples are truly lovely little deciduous trees. They add color charm to any garden, no matter how small. The maple leaves appear in spring a brilliant orange-red. They mature into light green, then blaze into crimson in the autumn.[图片]Growing Northwind Maples These maple trees have low canopies, with the lowest branches only a few feet above the soil. They grow moderately fast. If you live in a chilly area, you may be thinking of growing Northwind Japanese maple trees. According to Northwind maple information, these cultivars make an excellent substitute for less hardy Japanese maples in zone 4. Can you start growing Northwind maples in warmer regions? You can try, but success is not guaranteed. There is not a lot of information about how heat tolerant these shrubs are.[图片]This tree prefers a site offering full sun to partial shade. It does best in average to evenly moist conditions, but will not tolerate standing water. Northwind Japanese maples are otherwise not picky. You can grow them in soil of almost any pH range as long as the soil is moist and well drained, and is somewhat tolerant of urban pollution.

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2017年08月31日

You’ve heard of silver maples and Japanese maples, but what is a Korean maple? It’s a small maple tree that makes a wonderful substitute for Japanese maple in colder regions. For more Korean maple information and tips on how to grow a Korean maple, read on.[图片]What is a Korean Maple? Korean maple trees (Acer pseudosieboldianum) look quite a bit like the popular Japanese maples, but they are hardier. The trees thrive in U.S. Department of Agriculture plant hardiness zones 4 through 8. The tree is native to China and Korea, where it grows in forested areas. This small specialty maple matures to about 25 feet tall (7.6 m.) and wide.[图片]Korean Maple Information The Korean maple is a delicate tree with some exceptional features. In spring when new leaves open, they are soft and downy. Each has some 10 lobes and is about as wide as your hand. The blossoms appear in spring as well, hanging in surprising purple clusters. They develop into the tree’s fruits, winged samaras, in summer. A big attraction of the tree is its spectacular fall color. The dark green leaves flame into shades of orange, purple, yellow, red and crimson as the weather gets chilly in autumn.[图片]How to Grow a Korean Maple If you want to grow a Korean maple, find a site with moist, organically rich soil and excellent drainage. Korean maple trees will not be happy with wet feet. You can plant these beauties in a full sun area or a spot with sun-dappled shade. Don’t pick a site that is hot and dry.[图片]Caring for Korean Maples Once you have your tree started, caring for Korean maples includes watering. These are quite thirsty trees and require regular irrigation. Provide Korean maple trees with water every week throughout the growing season, but offer extra water during dry periods. You’ll also need to protect these trees from strong winds. Protection is also required in the coldest zones.[图片]You won’t have to worry much about insect or disease problems. While the trees are susceptible to stem canker, leaf spots and anthracnose, they do not have any serious pest or disease issues.

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2017年08月31日

The mahogany tree (Swietenia mahagnoni) is such a lovely shade tree that it’s too bad it can only grow in USDA zones 10 and 11. That means that if you want to see a mahogany tree in the United States, you’ll need to head to Southern Florida. These attractive, fragrant trees form rounded, symmetrical crowns and make excellent shade trees. For more information about mahogany trees and mahogany tree uses, read on.[图片]Mahogany Tree Information If you read information about mahogany trees, you’ll find them both interesting and attractive. The mahogany is a large, semi-evergreen tree with a canopy that casts dappled shade. It is a popular landscape tree in Southern Florida. Mahogany tree facts describe the trees as being very tall. They can grow 200 feet in height with leaves some 20 inches long, but it’s more common to see them growing to 50 feet or less. Mahogany tree information suggests that wood is dense, and the tree can hold its own in strong winds. This makes it useful as a street tree, and trees planted in medians form attractive canopies overhead.[图片]Additional Mahogany Tree Facts Mahogany tree information includes a description of the blossoms. These heat-loving ornamentals produce small, fragrant clusters of flowers. The blossoms are either white or yellow-green and grow in clusters. Both male and female flowers grow on the same tree. You can tell male from female flowers because male stamens are tube-shaped. The flowers bloom in late spring and early summer. Moths and bees love the flowers and serve to pollinate them. In time, woody fruit capsules grow in and are brown, pear-shaped and five inches long. They are suspended from fuzzy stalks in winter. When they split, they release the winged seeds that propagate the species.[图片]Where Do Mahogany Trees Grow? Where do mahogany trees grow, gardeners ask. Mahogany trees thrive in very warm climates. They are native to South Florida as well as the Bahamas and the Caribbean. The tree is also nicknamed Cuban mahogany and West Indian mahogany. They were introduced into Puerto Rico and the Virgin Islands over two centuries ago. Mahogany trees continue thriving in those places.[图片]Mahogany tree uses vary from the ornamental to the practical. First and foremost, mahogany trees are used as shade and ornamental trees. They are planted in backyards, parks, on medians and as street trees. The trees are also raised and felled for their hard, durable wood. It is used to make cabinets and furniture. The species is getting increasingly rare and has been added to Florida’s endangered species list.

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2017年08月31日

What is a madrone tree? Pacific madrone (Arbutus menziesii) is a dramatic, unique tree that provides beauty to the landscape all year long. Keep reading to learn what you need to know to grow madrone trees.[图片]Madrone Tree Facts Pacific madrone is native to the coastal ranges of the Pacific Northwest, from northern California to British Columbia, where winters are wet and mild and summers are cool and dry. It tolerates occasionally chilly weather, but isn’t highly frost-resistant. Pacific madrone is a versatile, relatively slow-growing tree that reaches heights of 50 to 100 feet or more in the wild, but usually tops out at only 20 to 50 feet in home gardens. You may also find it listed as bayberry or strawberry tree.[图片]Native Americans ate the rather bland, reddish-orange berries fresh. The berries also made good cider and were often dried and pounded into meal. Tea brewed from the leaves and bark was used medicinally. The tree also provided sustenance and protection for a variety of birds, and for other wildlife. Bees are attracted to the fragrant white flowers. The interesting, peeling bark provides texture to the garden, although the bark and leaves can create litter that may require a bit of raking. If you want to grow madrone trees, consider planting in a natural or wild garden, as the tree may not fit in well to a perfectly manicured yard. A dry, somewhat neglected area is best.[图片]Growing Madrone Trees Madrone tree information tells us that Pacific madrone is notoriously difficult to transplant, probably because in its natural environment, the tree is dependent on certain fungi in the soil. If you have access to a mature tree, see if you can “borrow” a shovelful of the soil under the tree to mix into the soil where you plant the seedlings. Also, Oregon State University Extension advises gardeners to purchase seedlings with the north/south orientation marked on the tube so you can plant the tree facing its accustomed direction. Purchase the smallest seedlings you can find, as larger trees don’t appreciate having their roots disturbed.[图片]You can also plant seeds. Harvest ripe fruit in fall or early winter, then dry the seeds and store them until planting time in spring or autumn. For best results, chill the seeds for a month or two before planting. Plant the seeds in a container filled with a mix of clean sand, peat and gravel. Madrones prefer full sun and require excellent drainage. In the wild, Pacific madrone thrives in dry, rocky, inhospitable areas.[图片]How to Care for a Madrone Tree Madrone trees don’t do well in a well-watered, manicured garden and they don’t appreciate being fussed over. Keep the soil slightly moist until the roots are established, and then leave the tree alone unless the weather is unseasonable hot and dry. In that case, an occasional watering is a good idea.

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2017年08月31日

Also known as red palm or red sealing wax palm, lipstick palm (Cyrtostachys renda) is appropriately named for its distinctive, bright red fronds and trunk. Lipstick palm is considered by many to be one of the world’s most beautiful and exotic palms. If you live in USDA plant hardiness zone 10b or above, where temperatures never drop below 40 F. (4.5 C.), you can grow this stunning palm in your own garden. Read on for more lipstick palm information.[图片]Lipstick Palm Information Lipstick palm is a tropical plant native to Malaysia, Borneo, Southern Thailand and Sumatra, where it grows in swampy areas, along riverbanks and in coastal tidal areas. It is threatened in some areas due to reduction of lowland forests. Red sealing wax palm reaches heights of up to 50 feet in its natural environment, but usually tops out at about 25 to 30 feet in the home garden.[图片]How to Grow Lipstick Palms Lipstick palm growing conditions includes partial shade while the plant is young. Otherwise, mature trees thrive in full sunlight. This warm climate tree prefers year round temperatures between 75 and 85 F. (24-29 C.). Red sealing wax palm doesn’t grow well in dry soil and isn’t tolerant of strong winds. It requires high humidity and even grows in swampy conditions or standing water, making this palm a useful pond plant.[图片]Although lipstick palm can be started by seed, it’s much easier and faster to remove and replant suckers from the side of an established tree. If you’re adventurous and want to try your hand at growing lipstick palm from seeds, remove dry seedheads from a plant, then remove the seeds and plant them in a planting media with excellent moisture retention. Germination generally takes at least two to four months, and seeds may not sprout for up to nine months.[图片]Lipstick Palm Plant Care As mentioned above, the main challenge when it comes to lipstick palm plant care is keeping the soil consistently moist. Otherwise, lipstick palm requires little attention. Although lipstick palm can be grown in a container indoors, most growers find it extremely difficult to maintain adequate humidity and warmth to sustain the plant.

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