动态第963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11日

The ghost orchid is so rare that it has been put on the list of threatened and endangered plants in Florida, one of the few places where it grows. The number of ghost orchids there is around 1,200, and it is illegal to pick any of them from the wild. Since you can't pick them yourself, you're going to need how to buy them, and how to do so within the law. [图片]Step 1 Determine whether you are up to the challenge of even owning a ghost orchid in the first place. The reason that ghost orchids are so rare in the wild is because they have such a low survival rate--and they have an even lower survival rate in captivity. You're going to need just the right temperature, just the right care, and even then, most ghost orchids will die before growing to their full size. Step 2 Find a nursery or garden center that sells ghost orchid seedlings. You will not be able to find full-grown ghost orchids to buy, since nurseries and garden centers take a profit risk trying to grow them. Most nurseries or garden centers that sell ghost orchid seedlings are located in Florida. Call your local nurseries or garden centers ahead of time, since these orchids are rare. Ask if the seedlings can be ordered if they are not in stock. [图片]Step 3 Search for online orchid dealers if no nursery or garden center near you carries ghost orchid seedlings. Understand that buying online makes growing the ghost orchid even harder, since seedlings may be damaged during shipping. Step 4 Prepare an area to grow your ghost orchid before you buy it. The ghost orchid is not a plant you pop in the dirt to grow; it needs a special system designed for its growing needs.

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Miss Chen

2017年08月11日

Ground orchids flower year round and with the right conditions, they grow for years. They are native to south eastern Asia and the Philippines and they do well in pots as well as flower beds. They are plants that communicate their needs with several visual indicators, so as long as you know what the signs are, taking care of your ground orchid is simple. [图片]Step 1 Add some fertilizer and compost to the soil you want to plant with a spade. You can also add charcoal, which keeps the soil loose and can help the roots spread. Step 2 Separate some ground orchid plants from the main group, because ground orchids reproduce when you divide them. Plant them in separate pots or in the prepared ground three to six inches apart. They need space and loose soil for their roots to spread out. Step 3 Water your ground orchid every five to twelve days, depending on the humidity in the environment. Allow the roots to dry out completely between waterings, or you risk killing them. Some orchids differ from ground orchids here and need their roots kept moist. Do not let the leaves on an orchid stay wet, or the plant may rot. Dry them with a cotton ball or tissue. Step 4 Keep your ground orchid in low-light or somewhat shady areas. If you have it in a pot indoors, put it in a window behind a curtain. In a flower bed, you might want to construct a trellis over your orchids to shade them and keep heavy rainfall off of them. If orchids get too much light, their leaves shade red. With too little light they turn dark green. You want bright green leaves on your orchids. [图片]Step 5 Deadhead your ground orchids by cutting the stems with flowers that have finished blooming and now wilt. This helps the plant continue to bloom. Check for dead or dying flowers every few days. If your plant stops blooming, cut the stem at a node or knob below the flower with gardening shears. If it is a really young plant, cut it near the ground, but it might take up to a year before it blooms again.

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Miss Chen

2017年08月11日

Orchids are very beautiful and delicate flowers, but they can be difficult to grow because they are temperamental by nature. They require a loose potting material to grow properly and stay upright. There are premixed varieties of potting materials for orchids, but you can learn make your own if you want to save a bit of money and customize your potting to your watering habits. Once you have learned the basic idea, you can re-create it in any amount you like to keep it on hand or plant several orchids with one batch of potting material mix. [图片]Mixtures If you prefer to mix a few types of potting media, use charcoal, fir bark and peat moss. All three are loose materials that will allow for a very small amount of water storage for the orchid, but mainly they will hold the plant in place without "packing" it in too tightly. Use 1 cup of both medium-grade charcoal and peat moss mixed with 6 cups of fir bark. Mix the materials together loosely with your hands, and gently pour it into the pot. Do not pack the materials down around the plant. Simply place them in a way to hold the plant steady. Single Material Potting Media Several types of potting mediums work well for orchids. The difference between them is water retention. If you frequently forget to water your plants, or if you are worried about dryness for any reason, use peat moss or fir bark chips because they hold on to more moisture than other potting mediums. If you are more worried about overwatering than drying, use a medium like clay pellets or rock wool because they dry quickly and will keep excess water away from the plant. If you are not worried about either overwatering or underwatering, use any of the potting mixtures you choose. Try a few and see which one you like best. [图片]The most common mediums for orchids, besides those already listed, are fir bark chips, redwood bark chips, osmunda fiber, tree fern fiber, coconut fiber, coconut chips, sifted perlite, granular charcoal and cork. Use a combination of any of the mediums you like, or use them individually. The main goals for potting orchids are proper irrigation, water retention control, and support.

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Miss Chen

2017年08月11日

Orchids are part of a plant group with over 30,000 species. Most orchids can rebloom several times after the blossoms dry up and die off. Some species require different care after the blooms die, but good general orchid care will help ensure your flower has the opportunity to rebloom. [图片]Cutting Some orchids require you to cut them to encourage reblooming. Certain species should be cut with a sterile tool just above where the stem grows out of the leaf and bulb. Other orchid species have black lines on the lower part of the stem that you should cut above. Other species do not require any cutting. Check with a greenhouse or garden store if you need help identifying your orchid's species or need specific cutting instructions. If you are concerned that your stem will get infected, you can rub a bit of cinnamon or rubbing alcohol on the freshly cut portion to keep bacteria out. Repotting After your orchid blooms die, you may need to repot your plant. Orchids should stay in the same potting soil for only two or three years at the most. Many orchids' roots are extremely sensitive, so use caution when repotting to avoid disturbing the roots too much. Plastic and clay pots are both suitable for orchids, but clay dries out quicker. Orchids in clay pots will require more frequent watering. Make sure your pot has adequate drainage holes to get rid of excess water. Repot your orchid in a premade orchid soil mix or make your own from osmunda fiber, soil, peat moss and shredded bark. [图片]Watering Overwatering your orchid can lead to root rot and quicker decay of the soil and compost. Use water the same temperature as the atmosphere around the orchid. Do not leave the soil soggy. Some orchid species require consistently moist soil, while others should be allowed to dry out completely before watering them again. Yellow or crinkled leaves are signs of overwatering, but these can take months to appear. Black or dark brown mushy roots are rotted. Remove these sections and repot your orchid. Light and Temperature Orchids thrive in humid environments with daytime temperatures between 65 and 80 degrees Fahrenheit. Nighttime temperatures 10 to 15 degrees cooler than the average daytime temperature will help stimulate new growth and blooms. Increase the humidity by placing your orchid pot on a tray with moist pebbles and mist your flowers with warm water each morning. Bright light will help your orchid rebloom after the blooms die. Allow your plant to get eight to ten hours of sunlight each day or use 40-watt florescent lights placed about 12 inches above the plant. Fertilizing Do not fertilize your orchids while they are dormant. During the blooming period, use a half-strength solution of a balanced 10-10-10 fertilizer every two weeks. If you grow your orchids in soil with a lot of tree bark, use a half-strength mixture of 30-10-10 every two weeks since tree bark does not contain the nutrients orchids need to thrive.

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Miss Chen

2017年08月11日

Despite their upscale reputation, orchids can be as easy to grow as more plebian plants. Among the varieties recommended for novices are the moth orchid (Phalaenopsis spp.), dancing ladies orchid (Oncidium spp. ), slipper orchid (Paphiopedilum spp.), and florist's orchid (Cattleya spp.). The first type is perennial in U.S. Department of Agriculture plant hardiness zones 11 to 12 and the second in USDA zones 10 to 11, while the hardiness of the latter two varies according to species from USDA zones 10 to 12. Most orchids are grown as potted house plants or greenhouse plants. Windows and Warmth Moth and slipper orchids will burn if given too much sunlight. They should occupy an east- or west-facing windowsill where they receive only a few hours of early morning or late afternoon rays or bright, indirect light. Dancing ladies and florist's orchids require stronger illumination. Place them on a sunny south-facing windowsill with a sheer curtain between them and the glass. Orchids will also grow happily under two shop lights, hung side by side 6 to 12 inches above the plants' leaves and timed to run for 12 to 16 hours every day. Position the most light-loving plants under the center of the four fluorescent tubes and the others closer to the ends. Orchids prefer a 10-degree drop in night-time temperatures, which you can provide for part of the year by keeping them outdoors -- on a roofed porch or under the high shade of a tree -- during summer. [图片]Soil and Sustenance Because most of these orchids grow on trees in their native habitats, they should be potted in orchid bark rather than soil. The exception is the semi-terrestrial slipper orchid, which needs a constantly damp medium, so grow it in an orchid mix which combines both compost and bark. For plants potted solely in bark, apply a high-nitrogen orchid plant food such as 30-10-10 once every two weeks during spring and summer, mixing 1/4 teaspoon of the plant food crystals with 1 gallon of water. For those whose mix contains soil, opt for a balanced 20-20-20 plant food every two weeks, using 1/2 teaspoon per gallon of water. In the fall, switch to a 10-30-20 plant food for all types, at the 1/2 teaspoon per gallon rate, to encourage bud production. Reduce the feedings to once a month at the same rate during the winter. H2O and Humidity With the exception of the slipper types, whose soil should be kept lightly moist, the orchids should be allowed to almost dry out before you water them again. They usually won't need to be watered more than twice a week during the summer months, perhaps once a week during the winter. If you grow your orchids in cache pots -- outer pots which conceal the inner ones -- be sure to empty the excess water out of those pots or the plants' roots will rot. To help provide the high humidity orchids prefer, place trays of gravel beneath the pots, but always keep the water level in those trays below the surface of the gravel. [图片]Pests and Pathogens These orchids can suffer from aphids, scale insects, spider mites, and thrips, which give the appearance respectively of green lice, brown bumps, mottled leaves with webbing, and white streaks on the flowers. Spray the plants thoroughly in the early morning with insecticidal soap, using about 1 1/4 tablespoons of the soap solution per quart of water. Repeat the treatment two days later for aphids or one week later for other insects. If kept too wet and/or cold, orchids can also suffer from black or brown blotches or rot on the foliage. Use pruning shears or a pruning knife to cut out the affected areas, dipping the blade or blades between cuts in a mix of 1 part rubbing alcohol and 1 part water, and dust the cut edges with an anti-fungal such as powdered cinnamon.

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Miss Chen

2017年08月11日

Native to tropical Asia, the bamboo orchid (Arundina graminifolia or Arundina barbusifolia) grows to 8 feet with reedy stems and evergreen, grass-like leaves up to 1-foot long. Its 2- to 3-inch-wide flowers appear in clusters at the stems' tips in summer and autumn, each lasting for about three days. Those fragrant blooms vary in color from white to pinkish mauve with a darker purple lip. The Missouri Botanical Garden lists the bamboo orchid as perennial only in U.S. Department of Agriculture plant hardiness zones 11 through 12, but other sources consider it hardy as far north as USDA zone 9. [图片]Indoor Position Due to its large size and preference for high humidity, this orchid generally performs better outdoors than indoors. If you wish to try it as a houseplant, a clump – which usually contains three to five canes – needs a pot at least 12 inches in diameter. The bamboo orchid isn't picky about its medium and can be grown in regular potting soil, sphagnum moss or a more typical orchid mix of 1 part organic potting soil, 1 part coarse orchid bark and 1 part sand. The bamboo orchid prefers full sun or at least partial sun, so position it on or near a south-facing windowsill where it receives temperatures between 60 and 80 degrees Fahrenheit. Keep the air moist around it by placing it in a humid room, such as a bathroom, or setting it atop a humidity tray. The plant is seldom bothered by pests or diseases. Indoor Provisions Water the orchid frequently enough that its medium or mix never dries out completely. Fertilize it once a week from spring to fall with a 20-20-20 plant food, mixing 1/4 teaspoon of the crystals into 1 gallon of water. Always follow label instructions. If possible, move the plant outdoors during the summer, setting it in shade at first, and gradually accustoming it to full sun. Outdoor Position If you wish to grow the bamboo orchid outdoors, place it in a protected, raised bed in full or partial sun. That bed should be filled with a humus-rich soil, which is about 2 parts compost, 1 part topsoil and 1 part coarse sand. Space the plants 1 foot apart in that bed and mulch it with 3 inches of shredded bark -- to keep the soil moist -- but don't allow the mulch to touch the plant's stems. [图片]Outdoor Provisions Water the bed about once every three days when there is no rain, or however often is necessary to prevent the soil from drying out. Feed the orchids once every two months during spring and summer by pulling back the mulch and sprinkling the pellets of an organic fertilizer, such as 5-5-5 around the bases of the plants, using 1 cup for each 20 square feet of bed. When all the buds on a cane have bloomed, snip that cane off near soil level with sterilized pruning tools.

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Miss Chen

2017年08月11日

Orchids are cultivated and prized by gardeners all over the world. According to the Brooklyn Botanic Garden, there are between 20,000 and 30,0000 different species of orchid in the world. In the wild, orchids can be found on every continent except Antarctica, though the great majority live in tropical and subtropical forests. About three quarters of all orchid species are epiphytes, which is a term that refers to plants that live and grow upon other plants. Orchids that grow on a host tree have a special kind of symbiotic relationship with it. [图片]Symbiosis Symbiotic relationships between organisms can take different forms. Marietta College describes three forms. Parasitism is a relationship where one organism, the parasite, receives or takes benefits at the expense of the host organism. Mutualism is a relationship where both organisms receive a benefit from the relationship. Commensalism is a symbiotic relationship where one organism receives benefits, but the other is nether helped nor harmed. Most epiphytic orchids fall into this category. Orchid Features Like other plants, epiphytic orchids have leaves, stems, flowers and roots. According to the Brooklyn Botanic Garden, their root systems tend to be less extensive than plants that live on the ground but are capable of fast, efficient uptake of water and nutrients. Epiphytic orchids are also capable of storing water in their stems to compensate for dry periods. They tend to grow on parts of trees that collect organic debris and water, such as on inner branches. Trees with rough barks that hold water and humus in cracks and crevices tend to support orchids better than those with smooth barks. [图片]Nutrition Epiphytes need nutrients in order to survive, grow and reproduce. They acquire their nutrition in different ways. Some are capable of taking in everything they need directly from the air around them. Others glean water, minerals and nitrogen from the decaying organic matter of their host tree. According to the American Journal of Botany, some species rely on other organisms growing on the tree, such as fungi, for nutritional benefits. Other sources of nutrition include waste products from insects and birds. Negative Effects Although the epiphyte doesn't harm the host by taking away its nutrition, there are ways that the host tree can be affected. The Brooklyn Botanic Gardens describe how the sheer weight of a mass of epiphytic growth can cause damaging branch breakage. Some host trees with rough bark may shed pieces of their bark periodically, preventing the overgrowth of orchids and other epiphytic plants. Others produce chemicals that can inhibit or discourage epiphyte growth. Positive Effects Epiphytes increase the amount of moisture in the air, helping to keep the tropical rainforests humid. This is important in that it helps the rainforest trees absorb nitrogen from the air. As described by the University of Missouri Extension, the uptake and utilization of nitrogen through the nitrogen cycle is essential to plant growth, function and reproduction.

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Miss Chen

2017年08月11日

Black orchids are popular in witchcraft stories, fiction, spooky legends and myths, as well as pop-culture comics characters. They are believed to be mysterious flowers, with magical powers. In reality, however, the black orchid is just another species of the exotic orchid family, considered a challenge to grow, but easy to raise and propagate. Black orchid flower arrangements are commonly used in corporate events or Gothic-themed parties, because of their mysterious and elegant color. [图片]The black orchid has many symbolisms. Many consider black as the color of death, and attribute evil connotations to it. However, the black orchid, with its imposing color and mysterious beauty, also signifies great power and absolute authority, and commands submission. It has long been a symbol of the elite class, as in fashion history, the use of the color was restricted to certain classes because of its formality. Species According to Onlineflowersguide.com, black orchid has two main types: terrestrial (grows on the ground) and epiphytes (grows on trees). There are many versions of the orchid considered dark enough or nearly black, such as: Dendrobium fuliginosa (the "Black Pam), Coelogyne pandurata, Miltonioides leucomelas, Dracula vampira, Dracula roezlii, Oncidium henckenii, and a few hybrids like Paphiopedilum Maudiae Prieta Paphiopedilum Makuli ("Candor Blackheart"), Paphiopedilum Black Velvet ("Candor Neat") and Paphiopedilum Maudiae ("Florafest's Queen"). Still, the truly pure deep black orchid continues to be the Liparis nervosa, called "kokuran" (which literally means black orchid) in Japanese. Origins The black orchid is common in Asia, as well as Central and South America. The orchid's name is derived from the Greek word "orchis," meaning "testicle," because of the shape of its bulbous roots, making the black orchid a symbol of virility. Early Greeks believed they could control their baby's gender by consuming orchid roots. If they want to have a son, the father should eat large, new orchid tubers; if they want a daughter, it's the mother's turn to eat small tubers. Orchid collection became popular and more extensive during the 19th century. [图片]Care & Propagation Black orchids easily adapt to any environment, but grow best in a warm temperature (not too hot or too cold) or partial sun exposure. It blooms from July to September and can reach up to 12 inches in height. It is propagated through six methods: seeds, meristem or tissue culture, division, areal cuttings, keiki or by dyeing white orchids using black dye. Significant Uses The black orchid, as a symbol of absolute authority and achievement, is the perfect gift for someone who has recently assumed a high position, graduated, attained a significant goal or achievement, or a leader. Gift it to your new boss, a graduate, or your parish priest. It is an appropriate gift for both males and females. The black orchid's virility connotations also make it an excellent gift for your mate to communicate your fertility wishes as well as your confidence in his sexual power.

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Miss Chen

2017年08月11日

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Miss Chen

2017年08月11日

The profuse blossoms fade and fall from the flower spike, leaving your moth orchid (Phalaenopsis spp.) bare. Phalaenopsis are the lovely flowering orchids found in many stores and florist shops. While other orchids may be available, Phalaenopsis is the easiest to locate, grow and rebloom. Hardy in U.S. Department of Agriculture plant hardiness zones 10 through 12, it thrives indoors in winter and enjoys shady outdoor locations in summer. [图片]Reduce the Temperature Phalaenopsis, Odontoglossum and Zygopetalum are among the orchid species that are stimulated to rebloom when temperatures drop 10 to 15 degrees Fahrenheit at night. The ideal temperatures for these orchids are 75 to 85 degrees F during the day and 60 to 65 degrees F at night. If the orchid is a houseplant, when outside temperatures drop at night, open a window to pull in the cooler night air. Monitor night temperatures -- the orchid should not be exposed to temperatures below 58 degrees F. Provide More Light Phalaenopsis, like other orchids, prefers bright, filtered light from an east- or west-facing window. In winter, you can use a full-spectrum grow light to provide additional light to help stimulate growth and new flower spike development. If the orchid's leaves are dark green, it's not receiving enough light. The leaves should be a light greenish-yellow. However, avoid placing the orchid in direct sun; the leaves easily burn in sunlight. Water Regularly Orchids require regular watering, generally once a week when the potting mix is dry. Place the orchid pot in the sink and fill the pot with water. Allow the water to drain completely from the potting mix, and then repeat twice to ensure that the bark or other medium is moist. Orchids also require higher humidity than most homes provide. A tray filled with pebbles and water under the orchid pot helps raise the humidity, while a cool steam vaporizer adds additional moisture to the air around the orchid. [图片]Fertilize Weekly To encourage the orchid to rebloom, it needs regular feeding. Feed the plant with a one-quarter strength 20-20-20 fertilizer solution every week, immediately after watering. Mix 1/4 teaspoon liquid fertilizer with 1 gallon of water, and pour the solution over the potting mix until it drains from the bottom of the pot. The American Orchid Society recommends avoiding fertilizers formulated with urea, which may burn the orchid's roots. Trim the Flower Spike Phalaenopsis reblooms from the flower spike, but the second blooming may have fewer, smaller flowers. Some gardeners trim the flower spike to one or two nodes, approximately 1 to 2 inches long. Others recommend trimming the flower spike to the base of the plant. Always sterilize your pruners before and after cutting the flower spike to prevent the spread of fungi or disease, using a solution made of equal parts water and rubbing alcohol. Enjoy the Flowers Orchids vary when reblooming. Some species may not bloom again until spring, while Phalaenopsis may begin developing new flower spikes from the nodes left on the trimmed flower spike and bloom again in eight to 12 weeks. Once the orchid blooms, the flowers linger for four months or more.

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