动态第878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26日

Japanese sweet flag (Acorus gramineus) is a striking little aquatic plant that tops out at about 12 inches. The plant may not be statuesque, but the golden-yellow grass provides plenty of bright color in soggy garden spots, along streams or pond edges, in semi-shady woodland gardens – or nearly any area where the plant’s moisture requirements are met. It is a good choice for stabilizing the soil in damp, erosion-prone soil. Read on for more information about Japanese sweet flag.[图片]Arorus Sweet Flag Info Japanese sweet flag, also known as Calamus, is native to Japan and China. It is a cooperative, slow-spreading plant that attains a width of 2 feet in about five years. Miniature greenish-yellow blooms appear on spikes in spring and early summer, followed by tiny red berries. The grassy leaves emit a sweet, rather spicy aroma when crushed or stepped on. Sweet flag is hardy to USDA plant hardiness zones 6 through 9, although some Acorus sweet flag info indicates the plant is tough enough for zones 5 through 11.[图片]Sweet Flag Care It doesn’t take much effort when growing sweet flag grass. Sweet flag plants tolerate light shade or full sun, although the plant benefits from afternoon shade in hot climates. However, full sun is best if the soil is extremely boggy. Average soil is fine, but be sure the soil is consistently moist, as sweet flag doesn’t tolerate bone dry soil and may scorch. Similarly, the leaf tips may turn brown in periods of extreme cold.[图片]To grow sweet flag in a pond or other standing water, place the plant in a container and set it in water less than 4 inches deep. Sweet flag plant benefits from division in spring every three or four years. Plant the small divisions in pots and let them mature before transplanting them into their permanent locations. Otherwise, growing sweet flag grass is nearly effortless.

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2017年08月26日

Uses for Sweet Flag Plants The most commonly used part of the sweet flag plant is its rhizome, which can be used to repel insects, scent a room, or give you something tasty and interesting to chew on. The flavor is usually described as spicy and strong, similar to ginger or cinnamon, with a bitter aftertaste. The leaves, too, can be bruised and hung around the room for their pleasant scent.[图片]When and How to Harvest Sweet Flag The best time for harvesting sweet flag is in spring before the new growth starts, or in autumn before the first frost. Sweet flag likes to grow in very wet conditions, like ditches or the shallow parts of streams. This means that harvesting sweet flag is bound to be at least a little messy. In order to get to the rhizomes, dig down at least a foot under the plant. You should be able to pull a big rooty mass out of the ground. This mass is likely to be very muddy. Remove the leaves and wash the roots.[图片]The rhizomes are about 0.75 inches in diameter and covered in smaller little rootlets that can be removed. Don’t peel the rhizomes – most of the oils are found near the surface. Sweet flag rhizomes are best stored sliced and dried.

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2017年08月26日

The name pondweed refers to the 80 or so species of aquatic plants belonging to the genus Potamogenton. They vary in size and appearance so much that it’s hard to describe a typical pondweed. Some are totally submerged under the water, while others are only partly submerged. The plants are an important part of the pond’s ecosystem, and they can be ornamental in the right setting. They serve as a valuable wildlife food as well as an oxygenator that helps keep the pond in balance. When out of control, however, the plants can choke the life out of a pond, and then it’s time take steps in controlling pondweed plants.[图片]How to Control Pondweed Before you use herbicides, there are a couple of other pondweed control methods that are worth considering. Prevention is the best method of control, so think carefully before you plant. If you decide to plant them, use containers to hold the roots rather than in the mud at the bottom of the pond. In small ponds, try getting rid of pondweeds by removing them manually. In large ponds, releasing grass carp in the pond will keep the plants under control. Grass carp feed on the tender, submerged parts of the plant. If these methods are impractical for your situation or don’t solve the problem, it’s time to consider managing pondweed in ponds using herbicide.[图片]Where herbicides for lawns and gardens are usually chosen based on the weed you are trying to kill, herbicides for ponds are tailored to the site. Read the label carefully before you choose, paying special attention to precautions, restrictions and intended use. Use the least toxic herbicide to protect the fish and other wildlife in your pond and preserve enough plants to support them. Herbicides containing the active ingredient endothall are a good choice for controlling pondweed. Once you’ve chosen your herbicide, follow the label instructions exactly. Measure carefully and if you have to use it more than once, wait the recommended period of time before the second application. Never use an herbicide in a pond that isn’t specifically labeled for aquatic use.

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2017年08月26日

The attractive, feathery fronds of parrot feather plants (Myriophyllum aquaticum) often encourage the water gardener to use it in a bed or border. The delicate appearance of growing parrot feather compliments other foliage in your water feature or bog garden.[图片]Parrot Feather Information Stop: before you make the mistake of planting this seemingly innocent specimen in your landscape, you should know that parrot feather information indicates that these plants are highly invasive. Once planted, they have the potential to readily escape cultivation and overwhelm native plants. This has already happened in numerous areas in the United States. Only female specimens of the plant are known to grow in this country and multiply from root division and plant pieces in a process called fragmentation. Tiny bits of the plant have moved through waterways, on boats and located themselves aggressively in many areas. Several states have laws that prohibit growing parrot feather.[图片]Growing Parrot Feather Growing parrot feather began innocently enough in the United States. The South and Central American native came to the country in the 1800’s to decorate indoor and outdoor aquariums. The attractive, feathery plumes of parrot feather plants took hold and began to choke out native plants. If you choose to use parrot feather plants in your pond or water garden, keep in mind that parrot feather plant care will consist of keeping the plant under control. Keep growing parrot feather in bounds by only using in lined ponds and water features or in containers.[图片]Parrot feather plants grow in fresh water areas from rhizomatous roots. Cutting the plant encourages it to grow, so control can be complicated if it grows to restrict your drainage pipe or begins to destroy beneficial algae. Aquatic herbicides are sometimes effective in parrot feather plant care and control. If you choose to grow parrot feather plants in or around your water feature or pond, make sure it is legal to grow it in your area. Plant only in a controlled situation, such as a container or indoor water feature.

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2017年08月26日

The lotus (Nelumbo) is an aquatic plant with interesting leaves and stunning flowers. It’s most commonly grown in water gardens. It is very invasive, so care has to be taken when growing it, or it will quickly take over its environment. Keep reading to learn more lotus plant information, including lotus plant care and how to grow a lotus plant.[图片]How to Grow a Lotus Plant Growing lotus plants requires a certain amount of diligence. The plants will spread quickly and easily if grown in the soil, so it’s best to plant them in containers. Make sure your container has no drainage holes – lotus roots can easily escape through them, and since your container will be underwater, drainage is a non-issue. If you’re growing lotus plants from rhizomes, fill a container with garden soil and lightly cover the rhizomes, leaving the pointed tips slightly exposed. Submerge the container in water so that the surface is about 2 inches above the soil line. You may have to put a layer of gravel on top of the soil to keep it from floating away. After a few days, the first leaf should emerge. Keep raising the level of the water to match the length of the stems. Once the weather outside is at least 60 F. (16 C.) and the stems extend several inches, you can move your container outdoors.[图片]Sink the container in your outdoor water garden no more than 18 inches from the surface. You may have to raise it up on bricks or cinder blocks. Lotus Plant Care Caring for lotus plants is relatively easy. Place them in a spot that receives full sun and fertilize them moderately.[图片]Lotus tubers can’t survive freezing. If your pond does not freeze solid, your lotus should be able to overwinter if placed deeper than the freeze line. If you’re worried about freezing, you can dig up your lotus tubers and overwinter them indoors in a cool place.

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2017年08月26日

Most people may not have heard of the plant called katniss until reading the book, The Hunger Games. In fact, many people may even wonder what is katniss and is it a real plant? Katniss plant is not only a real plant but you have likely seen it many times before and growing katniss in your garden is easy.[图片]What is Katniss? Katniss plant (Sagittaria sagittifolia) actually goes by many names such as arrowhead, duck potato, swan potato, tule potato, and wapato. The botanical name is Sagittaria. Most katniss species have arrow-shaped leaves but in a few species the leaf is long and ribbon like. Katniss has white three-petaled flowers that will grow on a long, upright stalk. There are about 30 species of katniss. Several species are considered invasive in some areas, so when planting katniss in your garden, make sure that you double check that the variety you have selected is not invasive. The tubers of katniss are edible and have been used by Native Americans for generations as a food source. They are eaten much like potatoes.[图片]Where Do Katniss Plants Grow? Different forms of katniss can be found in most parts of the United States and are native to North America. Most katniss plants are also considered marginal or bog plants. This means that while they can survive in a non-swampy area, they prefer to grow in wet and boggy areas. It is not uncommon to see these striking plants growing in ditches, ponds, marshes or the edge of streams. In your own garden, katniss is an excellent choice for a rain garden, a bog garden, a water garden and for low lying areas of your yard that may get flooded from time to time.[图片]How to Grow Katniss As mentioned above, katniss should be planted in areas where its roots will be in standing water at least some part of the year. They prefer full sun but will tolerate some shade, but if you grow it in a shady location, the plant will flower less. Once its roots have taken hold, katniss plant needs little other care provided they get sufficiently wet soil occasionally. Once established, katniss will naturalize in your garden. They spread by either self-seeding or rhizomes. If you wish to keep katniss from spreading too far, be sure to remove the flower stalks as soon as flowering has faded and divide the plant every few years to keep it a manageable size. If you choose to try growing a potentially invasive variety of katniss, consider planting it in a container that can then be submerged into the water or buried in the soil. You can plant katniss in your garden with either divisions or seeds. Divisions are best planted in spring or early fall. Seeds can be sown in spring or fall. They can be direct seeded to the location you wish for the plant to grow or can be started in a pan that has dirt and standing water.[图片]If you wish to harvest the tubers of the plant, this can be done at any time, though your harvest may be better mid-summer through fall. Katniss tubers can be harvested by simply pulling the plants up from where they are planted. The tubers will float to the surface of the water and can be collected. Whether you are a fan of the plucky heroine of The Hunger Games or are just looking for a nice plant for your water garden, now that you know a little more about just how easy growing katniss is, you can add it to your garden.

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2017年08月26日

Bulrushes are water loving plants which create excellent habitat for wild birds, trap beneficial bacteria in their tangled root system and provide nesting cover for bass and bluegill. They have an architectural beauty all their own and recall the biblical story of Moses, the child cast out onto the river amongst the bulrushes. In spite of all these charming details, the plant can become an invasive nuisance and foul up boat motors, clog water ways and choke out other plants. It is also protected in many states, so it is important to know how to kill bulrushes without harming natural habitat and wildlife.[图片]Bulrush Plant Facts Most nature lovers can recognize bulrush. Bulrushes are sedges which colonize ponds, lakes and riparian areas. There are both hardstem and softstem varieties. Both are important parts of aquatic diversity and are commonly found in North America. Occasionally, these plants can inundate an area and because they have low forage potential, are considered undesirable in flooded plains and meadows. The Department of Natural Resources only allows removal of bulrush plant weeds in small areas to gain access to lakes or streams and has particular rules on how this can be accomplished. Bulrushes can grow in 3 to 5 feet of water or they can thrive as riparian species on the edges of moist habitats. These sedges can also survive brief periods of drought and cold temperatures. They grow from both seed and stem or root fragments, either of which can spread rapidly downstream and colonize all parts of a waterway.[图片]Bulrush plant weeds can grow 5 to 10 feet tall and survive in marshes, bogs, sand or gravel bars. Hardstem bulrush grows in firm, sandy soil while softstem requires thick, soft silt in which to live. Bulrush has an appearance of a hard tubular or triangular stem with slender leaves. For survivalists, one of the more intriguing bulrush plant facts is its edibility. The stems and shoots are eaten raw or cooked and the roots and unripe flowers are boiled. Rhizomes may also be dried and pounded into flour.[图片]Why Do We Need Control of Bulrush? Hardstem bulrush is native to western North America and should not be culled in its native habitat except for small areas to open waterways. Softstem is native to Eurasia, Australia, New Zealand and some parts of North America. It may tend to become more invasive in certain types of soil and can even survive brackish water. Bulrush control in ponds may become necessary to keep it open for livestock or for irrigation needs. In small lakes, bulrush may close off boat routes and create problems for engines. The plant’s ease of spread may also be of concern as it edges out other wanted native species. Control of bulrush is restricted in most states and it is threatened in Connecticut and endangered in Pennsylvania. Check with your state Department of Natural Resources for the plants status and recommended removal tips.[图片]How to Kill Bulrush In managed waterways, bulrush is controlled by regulating the water levels. Higher levels promote established plants, while lowering the water can result in bulrush reduction. This can lead to other plants establishing in their absence, such as cattails, which may be less desired species. In areas where reduction of the plant is necessary, aquatic registered herbicides are recommended. These must be used with caution and all application instructions followed to prevent harming wildlife. Once you have an adequate amount of population reduction in the area, cutting under the surface of the water will provide bulrush control in ponds and smaller water bodies.

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2017年08月26日

What is bog rosemary? It is a marsh plant very different from the rosemary you cook with in the kitchen. Bog rosemary plants (Andromeda polifolia) thrive in boggy habitats like wet swamps and dry bog moss hummocks. Read on for more information on bog rosemary plants, including tips for bog rosemary growing.[图片]What is Bog Rosemary? Bog rosemary plants, also known as marsh Andromeda because of the species name, are creeping evergreens. Low to the ground (no taller than a couple of feet), they thrive in soggy areas in the landscape. This native is found growing wild in the northeast United States. It also is native to parts of Europe and Asia. The new growth of these marsh Andromeda shrubs is usually lime green, although sometimes you find reddish hues. The growth is covered with a waxy film, and matures into a deep green or blue green with pale downy undersides. The leaves of bog rosemary plants are shiny and leathery. The foliage contains andromedotoxin, a powerful poison, so bog rosemary plants are rarely nibbled on by animals. Bog rosemary blossoms are unusual flowers. You’ll see a half-dozen tiny urn-shaped flowers growing together in a cluster at each stem tip. The flowers appear in May, each about ¼ inch long and pale pink. The fruits of marsh Andromeda are small bluish dried capsules that turn brown in October. Neither the flowers nor the seeds are particularly showy.[图片]Bog Rosemary Growing If you have a perpetually wet corner of the garden, bog rosemary growing might be just the thing. True to its common names, marsh Andromdea loves and thrives in marshy areas. Don’t worry about spending a lot of time on bog rosemary care either. If you place this shrub in an appropriate site, bog rosemary care takes very little effort.[图片]When you have bog rosemary growing in a boggy spot in your backyard, you’ll find that it spreads quickly and requires little, if any, assistance. The plant tolerates compacted soil, wind and ice, preferring a location in U.S. Department of Agriculture plant hardiness zones 3 through 6. Another reason you won’t have to spend too much time on bog rosemary care: the plant has few disease or insect troubles. You don’t need to fertilize or prune it.

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2017年08月26日

There’s nothing as annoying in the garden pond as watermeal. This tiny, loathsome plant can quickly take over, ruining your beautiful landscape and forcing yet another manual cleaning of your pond to clear it up. Learn some easier ways to manage watermeal weeds long term in this informative article.[图片]What is Watermeal? Experienced garden pond owners shutter when the name is uttered because watermeal in ponds is big trouble for the backyard gardener. This aquatic weed can be a serious pain, but watermeal in ponds doesn’t have to mean draining your pond, yet again, to kill it back. There are several methods of effective watermeal control that work against the plant’s basic biology. Watermeal (Wolffia spp.) are holds the unique position as the world’s smallest flowering plant, but it’s also one of the world’s most annoying pond weeds. This 1 to 1 1/2 millimeter long, grain-like plant is commonly found embedded among colonies of duckweed, where it’s barely visible to the naked eye. If you dip your hand into the pond, remove some of the duckweed and rub it between your palms, you’ll feel a grainy sensation – that’s the watermeal. It can occur on its own, but this is a much less common situation. Watermeal removal is most effective with a two-fold approach that includes eliminating the material that the watermeal is feeding on and employing pond creatures to feed upon the weed itself. Prevention is a much easier process than control, but both require the same tactics. Once watermeal is choking the pond, it may be much easier to drain the pond and clean it completely before implementing protective measures.[图片]Controlling Watermeal Weeds Watermeal feeds greedily off of rotting material on the bottom of your pond. This black sludge may not look like much to you, but for watermeal, it’s a veritable buffet. Any program of watermeal control has to include management of that build-up, so if there’s fertilizer or agricultural run-off moving into your pond, or the leaves from the tree above end up in your pond every year, the first step is to slow this input. Surface netting can help trap leaves, or you can fish them out of the pond daily with a pool net. Run-off may be slowed by building an earth berm around the pond. Once the addition of nutrients is managed, it’s a good idea to add a bubble aerator to the deepest area in the bottom of your pond to eliminate the stratification. The lack of oxygen in deeper waters can make it hard for bacteria to break down whatever waste does accumulate. By adding a bubbler, you’ll increase oxygen and pond circulation so that your pond plankton can consume the excess nutrients before watermeal has a chance to set in.[图片]While the watermeal is at least somewhat controlled, you’ll want to introduce pond fish that eat this plant, like koi or grass carp. Koi will eat watermeal readily, while grass carp may eat other plants first. Another option is to add a couple of ducks to the landscape. They’ll readily gobble up this annoying plant pest as long as it’s kept reasonably in check by other methods.

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2017年08月26日

Graceful and elegant, water lilies (Nymphaea spp.) are a wonderful addition to any water garden. But if your water lily is not hardy for your climate, you may be wondering how to winterize water lily plants. Even if your water lilies are hardy, you might be wondering what you should do for them to help them make it through winter. Winter care for water lily plants does take a little bit of planning, but is easy to do once you know how. Keep reading to learn more about how to over winter water lilies.[图片]How to Winterize Water Lily Plants The steps for wintering water lilies actually starts long before winter actually arrives, regardless of whether you grow hardy or tropical water lilies. In late summer, stop fertilizing your water lilies. This will signal to your water lily plants that it’s time to start getting ready for cold weather. A few things will happen after this. First, the water lily will start to grow tubers. This will provide food for them over the winter. Second, they will start to die back and enter dormancy, which slows their systems down and helps keep them safe over winter. The water lilies will typically grow small leaves at this time and their larger leaves will turn yellow and die. Once this occurs, you are ready to take steps for wintering your water lilies.[图片]How to Store Water Lilies Over Winter Wintering Hardy Water Lilies For hardy water lilies, the key to how to over winter water lilies well is to move them to the deepest part of your pond. This will insulate them a little from repeated freezing and unfreezing, which will decrease your water lily’s chance of surviving the cold. Wintering Tropical Water Lilies For tropical water lilies, after the first frost, lift the water lilies from your pond. Check the roots to make sure that the plant has properly formed tubers. Without tubers, it will have a difficult time surviving the winter.[图片]After you have lifted your water lilies from the pond, they need to be placed in water. The containers people use to store their water lilies over winter varies. You can use an aquarium with a grow or fluorescent light, a plastic tub under lights or in a glass or plastic jar placed on a window sill. Any container where the plants are in water and get eight to 12 hours of light will work. It’s best to store your water lilies bare rooted in the water and not in growing pots. Replace the water weekly in container and keep the water temperature around 70 F. (21 C.). In the spring, when the tubers sprout, replant the water lily in a growing pot and place out into your pond after the last frost date has passed.

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