动态第876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27日

Elephants eat it, but you need not fear for your Portulacaria unless you have a pet pachyderm. The plant is a succulent with fleshy, glossy leaves that grows as a small bush. They are only hardy in USDA plant hardiness zones 10 and 11. Elephant bush houseplants (Portulacaria afra) thrive in bright light in a warm, draft free room. A few rules on how to care for elephant bush will help you grow a specimen of interest that may be a stand-alone plant or part of an intricate succulent garden.[图片]Elephant Bush Succulents Elephant bush plant may get 6- to 20-feet tall in habitat where it is a favorite food of elephants. In the home interior, it is much more likely to remain just a few feet tall. The bush has thick succulent brown stems with small tender green leaves that resemble a diminutive jade plant. The home interior is an excellent place to grow elephant bush houseplants. Portulacaria care requires warm temperatures and bright light. After a dormant period in winter, the bush produces small pink flowers grouped in clusters at the ends of the branches.[图片]Growing Elephant Bush Houseplants These succulents need well drained soil and an unglazed pot that will help excess moisture evaporate. The best mixture for this type of plant is cactus soil or potting soil cut by half with sand, vermiculite or pumice. Choose a location with indirect sunlight when growing elephant bush indoors. Overly bright sunlight can char the leaves and cause them to drop off. Ensure that the container you choose has wide drainage holes. Elephant bush succulents work well as part of a succulent display with plants that require similar care and situations.[图片]How to Care for Elephant Bush Portulacaria care is similar to other succulent plants. If planted outdoors in warm climates, dig in 3 inches of sand or gritty material to provide well drained soil. Watch for pests like whitefly, spider mites and mealybugs. The most common mistake made in succulent plants is watering. They are drought tolerant but do require watering from April to October. In winter the plants are dormant and you may suspend watering. Elephant bush succulents in the home interior should not have consistently wet feet. Make sure the pot drains well and don’t leave a saucer with water sitting under the container. Fertilize in late winter to early spring with an indoor plant fertilizer diluted by half.[图片]Propagation of Elephant Bush Succulents Like most succulents, elephant bush is easy to reproduce from cuttings. Take cuttings in spring or summer for best results. Let the cutting dry out and callous for a couple of days and then plant the cutting in damp gritty soil in a small pot. Place the cutting in a moderately lit area where temperatures are at least 65 F. (18 C.). Keep the soil lightly moist and in a few weeks the cutting will root and you will have a new elephant bush succulent to share with a friend or add to your collection.

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2017年08月27日

Growing pincushion cactus is an easy gardening project for the novice gardener. The plants are drought tolerant and native to the arid upper Sonoran desert. They are small cacti that make excellent additions to succulent displays. Pincushion cactus plant is a perennial that is most often found in heavily grazed pastureland and woody scrub. [图片]Pincushion Cactus Plant Varieties Pincushion cactus is a member of a family called Mammillaria, which includes 250 species of cactus. Some of the species of pincushion have colorful names. The Giant Snake or Crawling Log cactus (Mammillaria matudae) produce long stems. Snowball cushion cactus (Mammillaria candida) is a ball-shaped plant with white felt or fuzz on the skin of the plant. Old Lady cactus (Mammillaria hahniana) is a solitary cactus with white fuzzy hair-like spines and purplish red flowers. There are also Powder puff (Mammillaria bocasa-na) and Rose (Mammillaria zeilmanniana) among many others. Cactus and succulent stores can provide you with more pincushion cactus information. [图片]Pincushion Cactus Information Pincushion cacti are small, squat plants that usually don’t grow more than 6 inches in height. They can be ball or barrel shaped, and are native to the warmer regions of the United States. The pincushion cactus plant is most commonly grown indoors but it can tolerate some chilling temperatures if grown outside. Pincushion cactus is so called because it is covered in white spines over the entire surface of the plant. It is a very prickly little specimen that is best handled with thick gloves. [图片]Growing Pincushion Cactus Pincushion cactus care is very simple and suitable for the beginning gardener. Cactus plants are used to dry conditions and limited fertility. The soil for a pincushion needs to be well drained and gritty. The soil needs to dry out between watering, which is best accomplished with a sandy topsoil. The cactus goes dormant in winter and needs no additional irrigation until spring. Potted plants do well in unglazed clay pots, which allow any extra moisture to evaporate. Temperatures should be between 50 and 75 F. (10-24 C.). Small gravel spread around the base of the plant out to the root zone will act as a mulch to deter stem rot. The cactus produces offsets when it is mature. These can be divided from the mother plant and potted in a sandy soil mixture. You can also start the plants from seed in spring. Plant seed in a flat filled with cactus mix. Surface sow and then sprinkle sand lightly over the top and moisten the soil evenly. Place the flat in a warm location of at least 70 F. (21 C.). Keep seeds wet when growing pincushion cactus. Seedlings are transplanted when they can easily be moved. [图片]Flowering Pincushion Cactus If optimum heat and watering conditions are met, the pincushion cactus may reward you with flowers in spring. Enhance the chance of blooming by holding off watering until several weeks into spring. You can also apply a cactus food in early spring to give the plant the nutrients it needs to produce blooms.

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2017年08月27日

Native to the desert climates of the Arabian Peninsula and South Africa, pig’s ear succulent plant (Cotyledon orbiculata) is a hardy succulent with fleshy, oval, red-rimmed leaves that resemble a pig’s ear. Bell-shaped orange, yellow or red blooms grow atop tall, 24-inch stems in late summer or early autumn. Pig’s ear plant may reach heights of 4 feet at maturity. Keep reading for tips on growing pig’s ear plants and their subsequent care. [图片]Growing Pig’s Ear Plants Often known simply as a cotyledon pig’s ear plant, it is well suited for nearly any dry area of the garden, including rock gardens, succulent beds, hanging baskets or window boxes. Pig’s ear succulent plant is suitable for growing in USDA plant hardiness zones 9b through 12. If you live in a cool climate north of zone 9, cotyledon plant does just fine indoors. Cotyledon pig’s ear prefers a sunny location, but tolerates partial shade. Be sure the soil drains well and allow at least 24 inches around the plant, as succulents require excellent air circulation to prevent rot and other diseases. [图片]Pig’s Ear Plant Care Water pig’s ear succulent plant deeply when the soil is dry, then let the soil dry before watering again. In its natural environment, the plant needs very little water – only enough to survive. Too little water is preferable to too much. Pig’s ear requires very little fertilizer, and a light feeding in late spring is sufficient. Use a highly diluted, general-purpose fertilizer. Water well after feeding, as fertilizing dry soil can scorch the roots. To keep the plant healthy and support continued growth, remove blooms, along with the stalk, as soon as the flowers wilt. Pig’s ear plant care isn’t complicated, as the plant isn’t fussy. However, keep watch for snails and slugs, which are easy to spot by the chewed holes in the leaves and by the silvery, slimy trail they leave behind. Keep the area clean and free of debris. Apply slug bait or use snail traps, if necessary.

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2017年08月27日

Peyote (Lophophora williamsii) is a spineless cactus with a rich history of ritual use in the First Nation culture. In the United States the plant is illegal to cultivate or eat unless you are a member of the Native American Church. The plant is considered poisonous by U.S. officials but First Nations people use it as a sacrament and pathway to religious and personal enlightenment. While growing peyote is not allowed unless you are a member of the NAC, it is a fascinating plant with attributes worth learning about. There are, however, peyote plant look-a-likes you can grow at home that will satisfy your urge to cultivate this cute little cactus without breaking the law. [图片]What is the Peyote Cactus? Peyote cactus is a small plant native to the Rio Grande Valley of Texas and northeastern Mexico. It has numerous psychoactive chemicals, chiefly mescaline, which is used in religious ceremonies to elevate awareness and cause a mental and physical high. Peyote cultivation is a time-consuming process, as the plant can take up to 13 years to mature. In any event, growing peyote is illegal unless you are a member of the church and have filed the proper paperwork. The bulk of the plant is underground where thick, wide roots form, looking much like parsnips or carrots. The upper part of the cactus grows about an inch out of the ground in a rounded habit with a diameter of less than 2 inches. It is greenish blue with 5 to 13 ribs and fuzzy hairs. Peyote plants often have tubercles, which give the ribs a spiral appearance. Occasionally, the plant will produce pink flowers which become club-shaped, edible pink berries. The plant is considered endangered due to over harvesting and land development. A similar looking cactus, Astrophytum asterias, or star cactus, is legal to grow, but it is also endangered. Star cactus has only 8 ribs and a fibrous root system. It is also called the sand dollar or sea urchin cactus. Star cactus requires similar care to that of peyote and other cacti. [图片]Additional Peyote Plant Info The part of peyote that is used for ritual is the small cushion-like upper part. The larger root is left in the ground to regenerate a new crown. The upper part is dried or used fresh and is called a peyote button. These are generally no larger than a quarter once dried and the dosage is 6 to 15 buttons. Older peyote plants produce offsets and develop into larger clumps of many plants. The cactus has 9 narcotic alkaloids of the isoquinoline series. The bulk of the effect is visual hallucinations, but auditory and olfactory alterations are also present. Church members use the buttons as a sacrament and in religious teaching sessions. Care of peyote cacti is similar to most cacti. Grow them in a half and half mix of coconut husk and pumice. Restrict water after seedlings establish and keep the plants in indirect sun where temperatures are between 70 and 90 degrees Fahrenheit (21 to 32 C.). [图片]A few words on peyote cultivation An interesting bit of peyote plant info is the form of documentation necessary to grow it. You must be in Arizona, New Mexico, Nevada, Oregon or Colorado. You must be a member of the NAC and at least 25% First Nations. You are required to write a Declaration of Religious Belief, get it notarized and file it with the county Recorder’s Office. You must post a copy of this document above the location where plants will be grown. Only the 5 states listed allow church members to grow the plant. It is illegal in all other states and is federally unlawful. In other words, it is not a good idea to try to grow it unless you are a documented member of the Native American Church. For the rest of us, the star cactus will provide similar visual appeal and growth habit, without the danger of jail time.

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2017年08月27日

The pencil cactus plant is in the Euphorbia family of succulents. Another common name for the plant is Milkbush due to the cloudy sap it releases when injured. Be cautious when caring for a pencil cactus; the sap is toxic and may cause problems in some people. The pencil cactus needs high levels of light and moderately low moisture. It is an excellent houseplant and provides an interesting silhouette. Let’s learn how to grow pencil cactus in your home. [图片]Information on the Pencil Cactus Plant The pencil cactus is a large plant native to Africa and India. The plant is ideal for sunny warm spots indoors or greenhouse growing. Care of pencil cactus is minimal. Euphorbia tirucalli, or pencil cactus, is a tropical plant that may become 30 feet tall in habitat. The stems are slender and slightly toothed with no obvious foliage. The branches are the diameter of a pencil, which give rise to the name. The new growth on the end may be tinged pink and have tiny leaves which disappear as the branch matures. [图片]How to Care for a Pencil Cactus A pencil cactus needs very little care and can even be neglected if it is planted and situated correctly. The soil must be slightly gritty and well draining. The container to use could be an unglazed pot which will allow excess moisture to evaporate. Euphorbia plants are quite adapted to limited fertility environments and care of pencil cactus requires only one fertilization in spring. Full sun and temperatures of at least 65 F. (18 C.) or warmer are necessary when learning how to care for a pencil cactus. Pencil cactus is easy to grow. It will need water approximately every two to three weeks in summer but no water in winter. Allow the plant to dry out between irrigations. Care must be taken when caring for a pencil cactus to avoid the sap. Even eye protection is necessary because the pencil cactus plant produces a toxin that can cause an anaphylactic reaction. In most cases it can be cleared up with antihistamine but occasionally more severe reactions occur and are difficult to clear. [图片]Care of Pencil Cactus Cuttings Pencil cactus is very easy to propagate with cuttings. Great care must be taken when harvesting and planting these to avoid the sap, but the cuttings root readily. You will need small pots, a soilless medium to prevent rot and pathogens and a misting bottle. Take cuttings with a sterile razor blade and let them dry for two days to form a callus. Insert the cuttings into the medium at least an inch deep and mist. Caring for a pencil cactus cutting requires low light and slightly more moisture than fully established plants. Once new growth commences, gradually introduce the plant to higher light and reduce watering. The cactus will hit your ceiling in just a few years, so don’t be afraid to prune it and use the cuttings to make new pencil cactus plants.

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2017年08月27日

There are so many types of succulents with varying shapes that it can be difficult to decide which to include in the landscape. One little beauty that makes an excellent ground cover is called Othonna ‘Little Pickles.’ Read on to find out about growing ‘Little Pickles’ and Othonna plant care. [图片]About Othonna ‘Little Pickles’ Othonna capensis is a fairly slow growing evergreen succulent. ‘Little Pickles’ is so named for its one inch pudgy blue-green leaves that do, indeed, resemble tiny pickles. Indigenous to the Drakensberg Mountains of South Africa, the plant grows in low growing clumps of about 4 inches in height and a foot across. Yellow daisy-like blooms emerge and wave cheerily an inch or so from above the foliage. The name Drakensberg means ‘dragon mountain’ in Afrikaans, and the Zulu people refer to the plant as ukhahlamba, meaning ‘barrier of spears.’ This particular succulent was introduced by Panayoti Kelaidis of the Denver Botanic Garden. Othonna is sometimes referred to as ‘Little Pickles Ice Plant’ and while it does bear some resemblance to Delosperma (hardy ice plant) and is of the same family, Asteraceae, the two are not the same plants. Still, ‘Little Pickles Ice Plant’ or ‘Othonna Ice Plant’ will likely be how the plant is listed. [图片]Caring for Othonna Ice Plants Othonna capensis is a fairly slow growing evergreen succulent. ‘Little Pickles’ is so named for its one inch pudgy blue-green leaves that do, indeed, resemble tiny pickles. Indigenous to the Drakensberg Mountains of South Africa, the plant grows in low growing clumps of about 4 inches in height and a foot across. Yellow daisy-like blooms emerge and wave cheerily an inch or so from above the foliage. The name Drakensberg means ‘dragon mountain’ in Afrikaans, and the Zulu people refer to the plant as ukhahlamba, meaning ‘barrier of spears.’ This particular succulent was introduced by Panayoti Kelaidis of the Denver Botanic Garden. Othonna is sometimes referred to as ‘Little Pickles Ice Plant’ and while it does bear some resemblance to Delosperma (hardy ice plant) and is of the same family, Asteraceae, the two are not the same plants. Still, ‘Little Pickles Ice Plant’ or ‘Othonna Ice Plant’ will likely be how the plant is listed. [图片]Caring for Othonna Ice Plants Othonna makes an excellent ground cover and also thrives in rock gardens or even containers. Once established, ‘Little Pickles’ is fairly drought tolerant. It is suited to USDA zones 6-9 and, in some cases, even into zone 5. Blooming in mid-spring through the fall, Othonna should be planted in full sun in well-draining soil. It does not like wet feet, particularly during winter months, so good drainage is crucial. Other than a distaste for soggy roots, caring for Othonna ice plants is nominal. As said, once established, it is drought tolerant. In warmer southern zones, Othonna can be aggressive, so a barrier of some sort should be placed around the plants unless you want it to take over an area in the garden. If your Othonna is looking peaked, you can fertilize with low nitrogen fertilizer 1-2 times during the growing season; otherwise, there is no need for any specific Othonna plant care. ‘Little Pickles’ seeds are sterile, so propagation is accomplished by spreading leaves atop the soil. New plants should be well established after 5-6 weeks.

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2017年08月27日

What is Orostachys Dunce Cap and why does the plant have such an odd name? Dunce Cap, also known as Chinese Dunce Cap (Orostachys iwarenge), is a succulent plant named for its spires of silvery-lavender cone-shaped rosettes. The plant spreads via slender runners with offsets that fall off and take root to form new plants. Eventually, the pointy cones may produce tiny flowers. Read on for more information about Chinese Dunce Cap succulents. [图片]Orostachys Plant Info Orostachys is a hardy succulent native to the frigid mountainous regions of North China, Mongolia and Japan. The structure and growing habit of the plant is similar to the more familiar hens and chicks, although considerably smaller with a more delicate appearance. Chinese Dunce Cap succulents are suitable for growing in USDA plant hardiness zones 5 through 10. [图片]Dunce Cap Plant Care Growing Chinese Dunce Cap is easy. Most importantly, like all succulent plants, Orostachys Dunce Cap requires well-drained soil and is likely to rot in humid conditions. If you’re concerned that your soil may be a little too moist, dig in a generous amount of coarse sand or grit. You can also grow the plant in a container, indoors or outside. Use a well-drained potting mix product formulated for cacti and succulents, or simply add coarse sand or grit to a regular potting mix. Locate Chinese Dunce Cap succulents in bright sunlight. Feed the plant twice during the growing season, using a low-nitrogen fertilizer. Water Chinese Dunce Cap sparingly when the soil feels dry to the touch. Also, water the plant during the morning hours so the leaves have time to dry thoroughly before evening. Keep the leaves as dry as possible. Chinese Dunce Cap succulents are easy to propagate by division. Just locate an offshoot large enough to have a few roots, then cut the stolon (runner) close to the offshoot. Plant the offshoot in a pot filled with sandy soil, or directly in your garden. Watch for mealybugs, especially on indoor plants. If you notice the pests, usually evidenced by a waxy, cottony substance, pick them off carefully with a toothpick or spray the plants lightly with isopropyl alcohol or insecticidal soap. Never spray when the plants are in direct sunlight or when the temperatures is above 90 F. (32 C.).

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2017年08月27日

The organ pipe cactus (Stenocereus thurberi) is so named because of its multi-limbed grow habit which does resemble the pipes of the grand organs found in churches. You can only grow organ pipe cactus in warm to hot climates where there is room for a 26-foot tall plant. However, the cactus is slow growing, so planting organ pipe cactus in a container for a few years is a fun way to grow this interesting plant. [图片]Planting Organ Pipe Cactus Organ pipe cactus grows well in well-drained, gritty soils. Planting the cactus in an unglazed clay pot will allow excess moisture to evaporate. Use either a cactus mix or make your own with one part potting soil, one part sand and one part perlite. Immerse the cactus in the soil up to the bottom of the stems and press the soil around it to firm. Put a mulch of tiny rocks on top of the soil to conserve moisture and prevent weeds. Place the cactus indoors where temperatures are 70 -80 degrees F. (21-27 C.) in full sun. [图片]Grow Organ Pipe Cactus Organ pipe cactus is a wild growing plant found in hot, sunny southern Arizona. The cactus’ habitat is rocky, sandy and generally inhospitable and unfertile. Organ pipe cactus stems are generally about 16 feet long, and the entire plant can attain 12 feet in width. The stems are ribbed with 12- to 19-inch thick ridges. The entire plant is covered in black spines that become lighter as they get older. The organ pipe cactus lives a long time and doesn’t reach maturity until it is 150 years old. Organ pipe cactus care is highlighted by watering. The most common cause of potted cactus failure is over irrigating the plant. The cactus is used to low fertility, but as a potted plant has limited access to resources. Give it a good cactus food in the irrigation water in early spring. Do not water in the winter from November to February. Watch for pests, such as scale sucking insects, and use an insecticidal soap to combat them. You can put your potted cactus outdoors year round in USDA zones 9 to 11. [图片]Organ Pipe Cactus Flowers As they mature and grow, organ pipe cactus produce large flowers. The blooms are pure, snowy white with pink or purple edging and 3 inches across. The flowers are held well out from the cactus to help bats and insect pollinators access the bloom. The flower is primarily pollinated at night by bats or perhaps moths. The flower opens at night and closes in the day. April, May and June are the best times to see organ pipe cactus flowers. The flowers yield to large juicy fruits with bright red flesh. Homegrown organ pipe cactus are unlikely to produce flowers unless they have been in the landscape for over a century, but you can travel to the Organ Pipe National Park in Arizona to view the spectacular flowers.

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2017年08月27日

If you are looking for a houseplant with a lot of character and personality, consider growing old man cactus (Cephalocereus senilis). While it isn’t wrinkly or on social security, the plant does have fluffy white tufts of hair over the surface of the cactus body. The appearance is reminiscent of senior citizen pates, lightly cushioned by sparse, long billowy hair. Indoor cactus growing is most suitable in the majority of the United States growing zones. Learn how to grow an old man cactus and bring the cute little plant with the fuzzy white hairdo into your home. [图片]Old Man Cactus Houseplants This cactus can go outside in USDA zones 9 and 10. Native to Mexico, they need hot, dry climates and bright sunlight. The long hair is used by the plant to keep itself cool in its natural habitat. As an outdoor plant, they can get 45 feet tall but are generally slow growing as potted plants. Old man cacti are mostly grown as houseplants and stay small and easily kept in a container for their entire lives. Indoor cactus growing requires a southern- or western-facing window and temperatures of at least 65 F. (18 C.). For best growth, give it a winter hibernation period in an area where temperatures are below 65 F. (18 C.). [图片]How to Grow an Old Man Cactus Use a cactus mix or blend of sand, perlite and topsoil for indoor cactus growing. Also, use an unglazed pot for growing old man cactus. This will allow the pot to evaporate any excess moisture. Old man cactus houseplants like their soil on the dry side and overwatering is a common cause of rot and disease. Old man cactus needs a sunny, warm location but has few other needs. You should watch it carefully for pests, however, which can hide in the hair. These include mealybugs, scale, and flying pests. [图片]Old Man Cactus Care Old man cactus is easy to propagate from cuttings or seed. Seeds take a long time to grow into something recognizable as a cactus, but it is a cheap and fun project for children. Cuttings need to lie out on the counter in a dry location for a couple of days to callus. Then insert the cut end with the dry, white callus into a soilless medium, such as sand or perlite. Keep the cutting in moderate, but not scalding, light where temperatures are at least 70 F. (21 C.) for best rooting. Don’t water until the little cutting has rooted. Then treat your new old man cactus houseplants as you would a mature specimen.

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2017年08月27日

The ocotillo plant (Fouquieria splendens) is desert shrub that produces a spectacle of bright pink flowers on whip-like canes. It is often called ocotillo cactus, but is not truly a cactus, although it grows in similar conditions. The plant is native to the Sonoron and Chihuahuan deserts. The canes may grow up to 20 feet long in nature but are more likely to get 6 to 10 feet in cultivation. Ocotillo is suitable for xeriscapes, rock gardens and warm climate container gardens. [图片]Growing Ocotillo Ocotillo provides architectural interest and fantastic color displays of bright red to pink flowers. The ocotillo plant is a succulent with good drought tolerance once established and a cold hardiness of 10 F. (-12 C.). Growing ocotillo requires a well-drained soil in full sun. Ocotillo plant tends to lose its leaves when exposed to extreme drought but leafs out in spring and summer rains. Ocotillo really has no special needs and is an easy to grow plant provided it is used in a climate that can provide plenty of sun and heat. The plant may be difficult to locate at a nursery, although it is grown in Phoenix and a few other locations. Ocotillo is a native plant and is protected, which means it is illegal to harvest it from the desert. In the home landscape, plant ocotillo, cactus and a variety of succulents in a shallow container as a stunning desert display. It may take six to 12 months for your ocotillo plant to fully establish and begin to leaf out and flower. You can then stop irrigating and allow the plant to acquire its moisture from rain and dew. Ocotillo grows wild in areas with minimal fertility so it is not necessary to feed the plants more than once annually. Ocotillo care includes removal of dead and broken canes. Ocotillo plant has few pests and no known diseases, but watch for scale and sucking insects, which you can zap with insecticidal soap. [图片]Planting Ocotillo Planting ocotillo should be done in a hole that is twice as wide as the root system, but no deeper. It needs to go into the ground at the same level in which it was originally growing. Most ocotillo that are found in nurseries will be bare root and should be well supported in the ground. Ocotillo plant is then irrigated once a week during the summer while it is establishing. Water rarely in winter and continue good ocotillo care by weighting down the area around the roots with rocks to prevent it from falling over and to conserve moisture. [图片]Ocotillo Plant Uses in the Garden Ocotillo is found in the southwest parts of the United States and is excellent as part of a desert garden. Plant it with drought tolerant ornamental grasses and sempervivum or sedum. It is a large, wide plant when mature so make certain it has room to spread its canes. Plant an ocotillo in a clay pot as part of a succulent display.

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