动态第699页 - 绿手指 - 养花技巧、花生病了怎么办、花园打理和设计

2017年09月19日

When you receive a box of succulents you should open it at once. Not that you won’t! You will be eager to see the contents. The plants will be in immediate need of air and light. Be careful that the light is not too strong for a few days. Avoid putting them in sunshine. Remember that the plants are succulent, have evolved to resist evaporation from leaves or bodies and will not wilt like ordinary plants. Light and air are more urgent immediate considerations than water.[图片]Put the plants in a warm, bright place for a day or two and you can, if you wish, pot them up at once in slightly moist potting compost A light spraying now and then may help if the weather is hot and dry but avoid this in cold or damp weather. Let indications of fresh growth guide when to begin normal watering as well as weather conditions and the size and type of plant. Remember that cuttings without roots will not take water up without roots.[图片]For cacti cuttings without roots, larger cacti have more reserves of their own to draw on and will not likely make roots as soon as young, small ones. It is wise to plant these rootless larger plants in extremely porous gritty compost which will dry out within a few hours of watering. Or you can put a little water in the pot saucer now and again which will be taken up into the soil in the lower half of the pot so that when roots form they go down looking for that moisture. In the meantime they are not sitting in soaking wet soil and tending to rot.[图片]For plants with roots, just pot up in moist soil and watch for signs of life before you start a regular watering program. Move the plants or cuttings gradually into the light they need, some eventually into full sunshine. If you don’t know if the plants need full sunshine, keep them in a very bright place out of full sunshine until you find out what light each plant needs.

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2017年09月19日

Yet another wildflower favorite and must have for the garden is the Tradescantia (Spiderwort) plant. These interesting flowers not only offer something different to the landscape but are extremely easy to grow and care for.[图片]So how did such a lovely plant get such an unusual common name? While no one may know for certain, some people think the plant was named for the way its flowers hang down like spiders. Others believe it comes from its medicinal properties, as it was once used to treat spider bites. At any rate, it’s well worth having in the garden.[图片]The three-petaled Tradescantia flowers are usually blue to purple, but may also be pink, white or red. They only remain open for a day (blooming in morning hours and closing at night), but the multiple flowers will continually bloom for up to four to six weeks in summer. The plant’s foliage consists of arching grass-like leaves that will grow about a foot or two in height, depending on the variety. Since Tradescantia plants grow in clumps, they’re great for use in borders, edging, woodland gardens and even containers. You can even grow it as an indoor plant if garden space is limited.[图片]Growing Conditions Growing Tradescantia is easy and you’ll find the plants to be quite resilient. They’re hardy in USDA plant hardiness zones 4-9 and will tolerate more than what one would expect. Tradescantia typically grow in moist, well-drained and acidic (pH 5 to 6) soil, though I have found the plants to be quite forgiving in the garden and tolerant of many soil conditions. Tradescantia plants do best in partial shade but will do equally well in sunny areas as long as the soil is kept moist.[图片]Propagation Tradescantia can be grown from purchased plants or propagated through division, cuttings or seed. Plant them in spring about 4 to 6 inches (10 to 15 cm) deep and 8 to 12 inches (20 to 30 cm) apart. Stem cuttings in summer or fall will easily root in soil. Seeds can be sown outdoors in either fall or early spring and should be lightly covered. If starting Tradescantia seeds indoors, do so about eight weeks prior to transplanting outside. It should take anywhere from 10 days to six weeks for germination to occur. Hardened seedlings can be transplanted outdoors about a week after the last spring frost.[图片]Tradescantia as an Indoor Plant You can grow Tradescantia indoors too as long as suitable conditions are given. Provide the plant with either a soilless mix or loam-based potting compost and keep it in bright filtered light. You should also pinch out the growing tips to encourage bushier growth. Allow it to spend warm spring and summers days outdoors, if feasible. During its active growth, water moderately and apply a balanced liquid fertilizer every four weeks. Water sparingly in winter.[图片]Grower’s Tips These plants like to be kept fairly moist, so water regularly, especially if you’re growing them in containers. Cutting the plants back once flowering has ceased can often promote a second bloom and will help prevent re-seeding. Cut the stems back about 8 to 12 inches (20 to 30 cm) from the ground. Since Tradescantia is a vigorous grower, it’s probably a good idea to divide the plants in spring every three years or so.

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2017年09月19日

The Saguaro Cactus (Carnegiea gigantea) sports a medium-green, furrowed trunk with gray spikes. Saguaro Cacti grow very slowly and have a mature height of up to 50 feet (15 m). These cacti make a bold statement in the landscape with their stiff arms and coarse texture. Hardy in U.S. Department of Agriculture hardiness plant zones 9 and 10, Saguaro Cacti require full sunlight and extremely fast-draining soil. Planting a young nursery-grown specimen, 3 feet (90 cm) or less in height, is the best way to introduce one of these succulents into your yard. Raising a Saguaro Cactus is extremely easy, as they requiring only infrequent supplemental watering after planting.[图片]1. Dig a hole with a shovel in the southernmost portion of your landscape for the Saguaro Cactus. Fashion the hole twice as wide and equal in depth to the plant’s root ball. Remove any rocks from the hole and displaced soil. 2. Wear heavy gloves when handling the Saguaro Cactus to avoid injury. Look for markings on the pot that indicate which side of the plant was previously growing facing the south. Remove the cactus carefully from its pot.[图片]3. Place the plant in the center of the hole, positioning its southern side facing the southern exposure in your landscape. Add or remove soil from the hole’s bottom as needed to ensure that the root ball’s top is level with the surrounding ground. Fill the hole with soil, tamping it down periodically around the roots. Do not plant the cactus deeper than it was previously growing. 4. Flood the area with water from a garden hose immediately after planting. Water the soil to a depth of 8 to 10 inches (20 to 25 cm). Wait for the water to drain down through the soil. Fill in any resulting depressions in the planting area with additional soil if needed.[图片]5. Cover the Saguaro with a 50 percent shade cloth to protect its flesh from burning in the sun while the plant establishes new roots. Remove the shade cloth after one year of growth. 6. Water the Saguaro Cactus once every four weeks only if rainfall is absent during that time. Do not allow the soil to become soggy by watering too frequently, as this will cause the roots to rot. Never water the soil if it is damp to the touch.

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2017年09月19日

If you are fighting your Aloe vera plant for flowers, you are not alone. Most people struggle to get their Aloe vera plants to bloom when growing them indoors. But their usual yellow or orange tubular flowers, grown high on long, elegant stems, are a rare sighting in households due to the inadequate sunlight they receive.[图片]Aloe vera plants are built for the desert climate of Africa, where they receive large amounts of direct sunlight for a majority of the day. This large dose of bright light that Aloe veras are accustomed to does not translate smoothly to a household setting, where the location of the house and the plant may limit the amount of sunlight that reaches the plant.[图片]Adjusting the Indoor Placement of Your Aloe Vera Plant Due to the natural environment of the Aloe vera, the main trick is to give your houseplant as much light as possible. Indoor placement is key. Typically sitting on kitchen windowsills, the Aloe vera plant does not receive the sunlight it is used to or needs when raised indoors. You want to place your plant on a windowsill that receives a lot of direct sunlight, with nothing obstructing the plant’s line of sunlight or keeping it in the shade. At certain points in the day, some areas of your house also receive more light than others. Therefore, it is best to change the location of your plant throughout the day, allowing for it to follow the sun. The more exposure to sunlight, the better. During the summer months, you can also move your plant outside, as it is no longer in danger of freezing and an outdoor environment nicely mimics the high-sunlight desert conditions it needs to bloom.[图片]Other Tricks for Getting Your Resistant Aloe to Bloom: 1. Wait for your Aloe Plant to Mature You may be expecting too much from your newborn plant. Aloe veras tend to bloom only once they have reached maturity–a stage in their life that takes approximately 4 years to reach. If you have just begun caring for your plant, it is simply not ready. Have patience, and while you are waiting, take proper care of your Aloe vera by giving it the sunlight, water, and soil it needs to reach old age and bloom. 2. Know When To Expect Aloe Vera Flowers Aloe vera plants do not have flowers year-round. They usually bloom annually in the early springtime, so time your expectations correctly. If you are concerned why your plant has no signs of buds in the winter, that is just because the timing is not yet right.[图片]3. Fertilize or Repot Your Plant A healthy Aloe vera plant is more likely to produce the bright flowers you are looking for. To be healthy, an Aloe vera needs soil that can provides it with adequate nutrients. By either giving your plant fertilizer to replenish the old soil’s vitamins and minerals or repotting it to give it new soil and a new supply of nutrients, you can keep your plant healthy and watch it grow.[图片]Another way to encourage Aloe vera plants to bloom is by propagating them. The Aloe vera plant has bulbs that grow off of the main plant; you can and should remove them if you want a flowering plant. By taking away the additional bulbs, you give the main plant more energy to put into producing those tall, beautiful flowers. If you succeed in getting your Aloe vera plant to bloom indoors, congratulations! Enjoy the rare beauty.

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2017年09月19日

The ZZ Plant gets its common name from its botanical name. As Zamioculcas zamiifolia was long and difficult to say, many nursery workers simply shortened it to ZZ.[图片]ZZ Plant stems grow in a graceful, wand-like shape that starts thick and bulbous at the base and then tapers to a point. Along the stem are fleshy, oval-shaped leaves that make the plant look like stylized feathers. The entire plant has a waxy, shiny coating that makes it appear to resemble those made of plastic. Between the sculptural qualities of the plant and its waxy coating, it is not uncommon for people to insist that it must be an artificial plant.[图片]If ever there was the perfect plant for the ultimate brown thumb, the easy ZZ Plant is it. This virtually indestructible houseplant can take months and months of neglect and low light and still look amazing. Previously, the ZZ Plant would only be found in planters in malls and large office buildings where they would frequently be mistaken for fake plants, partially because they needed so little care and always looked healthy. But in recent years, they have found their way onto the shelves of both big box and hardware stores where anyone can purchase one. This has led to many people wondering how to grow ZZ Plants. The short answer is that it takes very little effort.[图片]Growing Conditions Light: Bright light is good but not essential. The ZZ Plant grows fine with low levels of light, but it’s best to avoid direct sunlight. Water: Allow the soil to become dry at the top to the touch between watering and do not over water. It’s best to water this plant less than too much because over-watering can cause stem and rhizome rot. Temperature: During the rest period should be kept at above 59°F (15°C) if grown on its own roots, 46°F (8°C) if grafted. Soil: Most well draining potting mixes will suffice that contains a high amount of perlite or sand within the mix (you can add more perlite or sand if needed to a mix that is bought). Good drainage holes at the bottom of the pot is essential.[图片]Repotting I would repot the ZZ Plant once a year at the beginning of spring, especially during the first 3 – 5 years – whilst it’s growing up. Pruning Cut away leaflets that are turning yellow near the base of a stem. Once a stem has grown much longer than all other stems you can remove that stem or cut it to size at the tip. The problem with cutting it to size at the tip is it can look quite odd, so removing it completely might be the best option.[图片]Propagation You may propagate by dividing rhizomes or with leaf cuttings. Leaf cuttings have to be placed in a pot with a plastic covering and then the wait for roots to begin growing, which could take up to a year. Grower’s Tips ZZ Plant care starts with a lack of care. In fact, ZZ Plants will do better if you leave them alone. Much like cacti, they need less rather than more water. Water the plant only when the soil has dried out. The rare way you can kill this plant is to over water it. A ZZ Plant turning yellow means that it is getting too much water and its underground rhizomes may be rotting. So if you remember nothing else about caring for a ZZ Plant, just remember to forget to water it. It can survive months without water, but will grow faster if watered somewhat regularly.[图片]ZZ Plants are happy without fertilizer, but if you would like, you can give the plants half strength fertilizer one to two times a year and only in the summer months. Growing ZZ houseplants is easy and especially suited for the forgetful gardener.

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2017年09月19日

What do you do when you have to move your place of residence for a considerable distance to another part of the country or even out of the country and have to move your entire succulent collection with you?[图片]1. Apart from the question of how to move the succulents themselves, if you are moving to another country, it is important that you know there may be plant quarantine and inspection regulations that you should investigate and your Department of Agriculture is the place to direct your inquiries. 2. If the plants are to be inspected, it is wise prior to having that done to thoroughly soak the soil and dip all plants in an insecticide solution. This should be done long enough before moving to allow time for a couple of normal waterings to leach out the excess (and the smell to hopefully disappear) and then time for the soil to dry out thoroughly. In any event, before you attempt to pack your plants for moving, the soil in the pots should have time to thoroughly dry out.[图片]3. If there are no restrictions about moving your succulents in their pots, soil and all, you can wrap each plant, pot and soil in two or more layers of newspaper and pack them, right side up, into cartons provided by the movers. Large plants on the bottom, progressively smaller and lighter ones on top. 4. Even if shipped bareroot (no pots and soil removed), plants need a thorough drying out period before packing, to induce a state of partial dormancy so that they would not etiolate (lengthen and grow out of shape) and otherwise suffer from the time they are confined in wrappings, in a box and in the dark.[图片]5. Most movers charge by weight as well as distance. If you have a very large collection and weight is a factor in the cost of shipping, you are better to move your succulents bare root with all soil removed. However, you would then be faced with the task of reporting the collection on arrival, on top of all the other chores of becoming settled in a new home. Succulents are wonderfully patient though and on arrival, if you can just manage to get them unwrapped and into the air and light, they will wait a few days until you can pot them up. 6. On each box of succulents ready for moving, affix a large piece of white paper and with a heavy hand and a marking pen write PLANTS – PERISHABLE on each box.[图片]7. You must discuss with your mover the importance of packing your plants properly. If you don’t explain that you are moving perishable plants they could be packed on the bottom of the van with all your furniture on top of them!! Sometimes moving vans move the contents of more than one home in their vans. In this case it is all the more important to arrange with your mover not to put your plants under everything else in the truck.

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2017年09月19日

Peperomia is a relatively easy, compact, and attractive little plant to grow. They are neither as striking as Begonias nor as hardy as Dracaena, which may account for their relatively low profile in the world of houseplants. But these plants have all the features we look for in houseplants: variability, interesting leaves, and tolerance for a relatively wide range of conditions. Although it may be tempting to think of Peperomia as succulents, due to their thick, slightly succulent leaves, that would be a mistake because they generally prefer higher humidity and more water than most succulents. In fact, these plants are native to South American rain forests, where they grow quite happily in the loamy, dappled light, cool understory of the rain forest.[图片]Growing Conditions Light: Peperomia do well in light to moderate light, such as found in a northern or east-facing window. They can be easily grown under fluorescent lights. Water: Keep the soil moist during the growing season and provide relatively high humidity through spraying or by setting the pot in a gravel tray. Temperature: Average. Peperomia do well in the relatively cool environment of most homes (although they dislike the dry). Aim for 65˚F to 75˚F (18˚C to 24˚C).[图片]Soil: A loose, well-drained, very rich potting mix. Fertilizer: Fertilize biweekly during the growing season with a diluted liquid fertilizer or use controlled-release fertilizer pellets at the beginning of the growing season. Repotting Peperomia thrives when slightly pot-bound, so don’t over pot them. Repot plants in spring, especially to refresh the existing soil, but place either back into the same size container after root-pruning or go up only one pot size. The largest Peperomia remain relatively small, so they will never grow into large specimen plants.[图片]Propagation Most Peperomia species can be relatively easily propagated from leaf cuttings, similar to the way African violets are propagated. Remove large leaves with their stalks (petioles) and bury in seedling starting soil. Use of a rooting hormone can increase odds of success. Place the cutting in a warm, bright place until new growth emerges.[图片]Grower’s Tips Peperomia are not particularly hard plants to grow, and their small size and delicate leaves make them perfect for desktops and dish gardens. They will rarely overtake their neighbors or shade them out. In short, they are perfectly mannered and attractive little plants. The biggest problem facing Peperomia are usually related to watering. They like steadily moist soil, but can be very sensitive to overwatering. Overwatered Peperomia tend to wilt (paradoxically) or have raised, scab-like protrusions on their leaves. Don’t be alarmed if your plant loses a few bottom leaves, but massive leaf-drop is usually due to a temperature change or fertilizer problem. Lastly, Peperomia are susceptible to mealybugs, so keep an eye out for cottony white masses on the stems or undersides of leaves.

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2017年09月19日

Zones Hardy succulents are hardy zone 3-9 unless otherwise labeled. Plants shipped in early spring are dormant. They will appear dull in color and have some dry edges. This is normal and when placed in sunlight they will intensify in color. Sempervivums change color with the seasons and each variety has its own most colorful time of the year.[图片]Light Most varieties need at least half a day to a full day of sunlight. In extremely hot areas some afternoon shade is recommended. Planting Remove plants from their pots and plant making sure the soil level remains the same depth on the plant. Once established, your succulents will benefit from a layer of pebbles or pea gravel spread on the soil around the plant. This is also very decorative.[图片]Soil Succulents need good draining soil. When planting in the garden, make sure the area drains well and is not in a low spot that would stay wet. For container planting you can purchase cactus soil or incorporate sand, gravel or volcanic rock for better drainage. The container you are planting in should have a drainage hole or put crushed rock on the bottom before your planting medium. Watering After planting, water in well and allow the soil to dry slightly between waterings. Succulents don’t like to have wet feet. When you do water, water thoroughly.[图片]Fertilizer Most succulents need very little fertilizer. Watering with a well balanced fertilizer once a month will be all they need. Flowering Sedum all have different bloom times and colors ranging from pink, red and yellow. Sempervivums will bloom after the second or third year. A flower stalk will shoot up from the center of the main rosette with a cluster of flowers. After the flower dies, gently twist off the stalk. The main rosette has put on new offsets that will fill in.[图片]Uses The planting possibilities using succulents are endless. The different colors, textures and habits make the most interesting containers and troughs. Succulents make beautiful rock garden plants. With a wide variety of bloom times there is always something with color.

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2017年09月19日

The Christmas Cactus, no other plant seems to be equal, for its odd beauty or for the number of questions from frustrated owners about its care and culture. Stand beside a plant in full flower and just listen to the comments. Every other question concerns this pink-flowered tropical cactus from Brazil.[图片]“Why doesn’t it bloom?” “It flowered last year but not this year. Why?” “How much water should I give it?” “It rots at the base. Why?” Question after question about Schlumbergera bridgesii (formerly Zyyocactus truncatus). And with good reason. The Christmas Cactus is confusing. Even botanists don’t always agree, except on where it originates — Brazil. There it is an air plant, growing on trees. Here, in North America, it has become a pot plant capable of a lively existence in the home or greenhouse.[图片]Prized For Its Flowers Its pendent, Fuchsia-like flowers, brilliant cerise pink with gold stamens against a background of odd, crablike jointed deep green foliage is as exotic as its orchid neighbors in the tropical forests of Brazil. It blooms for about two months at a time of year when good flowering plants are at a premium. As soon as the first flowers fade, more open. Mature plants can produce hundreds of flowers. Its life span is measured in decades. I know of two that are over 20 years old, and have heard of one that is 32. This is not even close to the record.[图片]Moisture… A Relative Term Being tropical jungle plants, they need more moisture and shade than most other cacti. But the term “more moisture” is relative. The soil should be moist but not too much so. Be sure there are broken clay pot pieces, pebbles or charcoal at the bottom of the pot for drainage. Never set the plant in a saucer of water. Too much water causes the roots to rot. Let the soil dry out occasionally well down into the pot to prevent the soil from going sour.[图片]Soil and Potting The soil itself should be a little richer than that used for other cacti, but since the plant likes a slightly acid soil, avoid lime or bone meal. A mixture of two parts good cactus potting mix, one part coarse builder’s sand and one part peat moss is excellent. Use a pot not much larger than the diameter of the plant (a 2-inch (5 cm) plant in a 3-inch (7.5 cm) pot). Put in a handful of soil. Set in the plant, spreading the roots. Now fill the pot to within a half-inch of the rim and press the soil down firmly with the fingers. Place the plant in a bright place away from direct noonday sun and drafts. Try to make this spot almost permanent, as the Christmas Cactus does not like to be moved about. Choose an east or west window as the best location for the plant. A south window with some shading is next best.[图片]Thrives on Neglect The number of questions asked about Christmas Cactus is more amazing considering that the plant thrives on neglect. Weeks without water won’t harm it. In fact, too much care is dangerous to the plant. Late spring is the best time for repotting, should that be needed. Transfer the plant into a pot that is one size larger than what it is in now. Then set it in the shade outdoors for the summer. New leaf growth starts in the spring. When it does you can start fertilizing it about every two weeks with a good liquid fertilizer, following directions on the package.[图片]Time For a Nap In early fall when nights start to get cool, bring the plant inside and give it a 30-day nap. Place it in a cool, dim location and do not water it for about a month. Then gradually expose it to full sunlight and increase the water supply over what it had when it was outside. Like Chrysanthemums and Poinsettias, the Christmas Cactus is a short day plant. As the days get shorter its buds are formed. This is when most of the mistakes are made that delay its blooming or stop it altogether.[图片]Avoid Strong Artificial Light Strong artificial light on it at night will retard the bloom. if you must turn on the lights where the plant is, cover it with a double sheet of newspaper, sheet or towel. Watering at this time, when the buds are formed, is decreased. If the plant receives no artificial light from sundown to sunup, it will justify its name by blooming approximately at Christmas. Can Be Grafted The plant is tough and adaptable. It can be grown on its own roots, or those who are technically inclined can graft it on Pereskia or Opuntia and make standards out of it.[图片]Careless handling sometimes causes the crablike joints to break. Lay the pieces aside in a dry shady spot until the raw ends harden into a callus. Then plant them in soil or sand. There is little danger of the cuttings starting to rot. The pagoda-like flowers will brighten up the dull winter months as a special reward for the small care the plant requires.

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2017年09月19日

Albuca is an arresting bulbous flower that is native to South America and Arabia. The plant is a perennial but in many North American zones it should be treated as an annual or dug up and overwintered indoors. Caring for Albuca isn’t difficult provided the plant is in the correct site where soil drains well, is moderately fertile and average moisture is available. The biggest problems when growing Albuca are rotten bulbs from excess wet and frost damage.[图片]There are many forms of Albuca. These flowering plants all have similar flowers but can grow extremely varied forms of foliage dependent upon variety. It is also known as Soldier in the Box and Slime Lily. The latter is due to the slimy sap the plant exudes when broken or damaged. Despite the rather disgusting name, Albuca leaves and blooms are covered in downy hairs which emit a pleasant scent when touched and the flowers are simple and elegant. Albuca was first collected in the 1800’s and today there are 150 recognized species. Not all of these are in cultivation, but the varieties that are make especially appealing and unique plants for the summer garden. Most specimens have white, green or yellow drooping or erect flowers with three petals.[图片]In their native South America, Albuca blooms in late winter to early spring. In North America, these should be planted for spring to summer bloom times. Growing Albuca usually starts with seeds or bulbs. Seeds can take 3 years to produce flowers. An interesting piece of Albuca information is its relation to common asparagus. Most species have a dormant period where they lose their leaves after flowering. Growing Conditions and General Care Albuca bulbs require sandy, loose soil in full to partial sun to produce their characteristic blooms. The plants can grow 3 to 4 feet (90 to 120 cm) tall with a slightly smaller width. Good cultivation encourages removal of the bulb from the outdoors in zones with frost. They are not frost hardy and cold temperatures can damage the bulb.[图片]These South African natives look particularly attractive in rock gardens, slopes and even containers. The biggest requirement for Albuca care is superior drainage. The regions to which they are native are not known for consistent moisture, which means it is drought tolerant once established. Consistent watering at planting is necessary to mimic the rainy season but thereafter, light watering is all that is necessary when caring for Albuca. Fertilize the bulbs annually at installation and in the early spring with a good all-purpose bulb food. Cut back spent foliage after it yellows and begins to wilt. Propagation The best way to propagate is from offsets, which can be divided away from the parent plant and separately planted. Not all Albuca produce offsets so you may need to rely upon seeds to get more of these exciting plants.[图片]Fresh seeds generally germinate a week after sowing. They should be planted at the same time the parent plant is actively resprouting. It needs to be planted fairly quickly, as seed has a viability period of only about 6 months. Once planted, keep seedlings moderately moist in medium light and a warm area. In about 3 years, you can look forward to another plant which may be different from the parent plant, as these seeds tend to hybridize easily.

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* 图片尺寸不得小于300*300px