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Dummer. ゛☀
2017年09月22日
Dummer. ゛☀
Succulents grow thick fleshy leaves and stems that store moisture and nutrients. This ability allows the plants to thrive in dry conditions. Potted succulents often require less watering and fertilizer than other houseplant varieties, but the irrigation they do require flushes nutrients out of the soil, so they need periodic feeding. Too much fertilizer, especially high-nitrogen blends, increase leaf and root rot problems. It’s vital to use the right blend and avoid overfeeding to keep the succulents healthy.
Dissolve a low-balanced soluble fertilizer, such as an 8-8-8 or 10-10-10 formula, in 1 gallon (3.8 l) of water, Use half the amount of fertilizer recommended on the package for most succulents. For example, use ½ tablespoon 10-10-10 fertilizer if the label recommends using 1 tablespoon per gallon of water. Dilute to one-quarter strength for tropical succulents that require more frequent watering, such as a Christmas Cactus.
Water succulents with the half-strength solution until the excess moisture just begins to drain from the pot bottom. A gallon ((3.8 l)) of fertilizer solution may be enough to feed several plants, depending on size. Apply the fertilizer in spring as new growth begins and again in late summer or early fall. Do not fertilize when the succulents are semidormant in winter.
Irrigate tropical succulents weekly with the quarter-strength solution during the plant’s active growing season. Some tropical varieties actively grow in summer, while others are winter plants. Stop the fertilizer applications when plant growth naturally slows.
Apply fertilizers when the soil in the top inch of the pot has dried completely. Postpone a weekly application if the soil is still moist, so the soil can dry. Tip You can substitute the quarter-strength fertilizer for most succulents if the soil is drying rapidly in the pot and necessitating more frequent watering. Frequent irrigation flushes the nutrients from the pot before the plant can access them.
Outdoor succulents usually don’t require fertilizer because they can access the nutrient store in the soil. If they do need feeding, apply half the recommended amount of a balanced slow-release fertilizer in spring.
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Dummer. ゛☀
2017年09月22日
Dummer. ゛☀
Even if you love that great succulent look, or if drought has led you to these plants, you may already have had trouble growing them. The cause of death is overwatering, after which rot sets in, and the plants literally melt down into a gushy rotten mess. The problem is knowing when they want water and when they don’t.
For you to understand the “when to water” question, you need to know how succulents are different from ordinary plants. The chief characteristic is specialized cells that hold moisture ready rather than deriving new moisture daily from the soil. After they are watered, succulents take up moisture until every succulent cell is fully hydrated. Over time, they utilize this stored moisture, gradually reducing the hydrostatic pressure inside the cells and tissues within the plant. In between water applications, the roots prefer a dry, airy soil, which is why they are typically grown in porous potting soils for cactus and succulents.
Problems arise in wetter or more humid climates when soils don’t dry out in between water applications. They also occur when the drain hole in a pot becomes blocked or if it was too small to begin with. Pots designed for succulents often have numerous holes for this reason. To know when to water them, you must learn how to tell when hydrostatic pressure is low.
Physical Touch When your newly watered succulent is fully hydrated, it’s in the “hard body” stage. Squeeze it gently to get a feel for how hard the individual plant becomes, and let this serve as a basis for future comparison. When the internal moisture is used up, the whole plant will gradually soften due to loss of pressure. They actually yield to your touch. Beware of those with only some parts softening, as this can indicate invisible rot is spreading into healthy tissue.
Visual Change Every succulent plant when fully hydrated will stand up to its full height and form, which combine to create attitude. Many alter their overall attitude when internal pressure drops low enough. For example, Pachypodium’s long thin stalk will literally fold in half, then once watered, it straightens right back up again as hydrostatic pressure returns. Others will show slight wrinkles on the skin caused by reduced interior tissue volume. Drooping leaves, sagging tips or subtle leaning are all changes of attitude caused by low internal moisture.
Watering Method In my experience, there are a lot of problems caused when succulents are watered from the top down like ordinary potted plants. Water travels down the edges of the soil mass and out the bottom, leaving too little behind for adequate uptake. Succulents often rot right at the soil line due to this kind of watering. For easily handled pots, simply set them in a pan of water so the soil inside can wick up the water through the drain hole. When the moisture wicks up to the surface of the soil, take the pot out of the water and let it drain. This method ensures that the entire soil mass, not just the edges are fully moistened.
Remember that most succulents originate in habitats with occasional heavy rain events followed by extended periods of drought. Fortunately they speak to us in the silent language of touch and appearance, which tell you clearly when they’re dry enough for a drink.
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Dummer. ゛☀
2017年09月22日
Dummer. ゛☀
Succulent plants store water in their tissue. That, by definition, is what makes it a succulent plant. Succulents use the water they store in their tissue to help them survive long, dry periods. Since cacti and other succulents as a general rule grow in dry places, they take up water through their roots very quickly and efficiently. On the other hand, they do not have the ability to quickly get rid of excess water. While this all works out fine in the wild, when csucculents are grown in cultivation, people can supply more water than the succulents needs. This is actually a common situation and the plants in cultivation look plump and happy compared to their habitat counterparts.
But the real problems start when people don’t just give their succulent more water than it needs, but more water than it can handle. This is overwatering. When a succulent is overwatered, it will swell up more and more and often times the cactus stem will become so saturated that it splits open in one or more places. While a succulent can usually recover from this, the other result of overwatering (especially when combined with cold temperatures) is rot. Sometimes just the roots will rot off, but often times the whole plant will turn to mush.
Treatment The first thing to do with an overwatered cactus or other succulent is stop watering it! In most cases, repotting would also be a good idea. When the plant is unpotted, you can let it stay unpotted to dry out for a week or two and then repot it. If the plant body has split in any place, the damage is permanent and there is nothing you can do but let it scar over. If the plant has started to rot, saving the plant will depend on how far the rot has set in.
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Dummer. ゛☀
2017年09月22日
Dummer. ゛☀
Cacti and succulents have a wonderful ability to store and conserve water. In the desert this really comes in handy. Damage from under-watering is easily correctable. Damage from over-watering happens rapidly and typically results in death of the plant. When in doubt, water conservatively! Remember deep watering infrequent is preferred over frequent shallow watering.
Symptoms of Under-watering Cactus skin begins to wrinkle due to shrinkage of the water-storing tissue. The leaves on Agaves will bend downward due to a drop in water pressure inside the leaf. Remedy by soaking the ground about one foot down and outward. Cactus and succulent roots are shallow but widespread.
Symptoms of Over-watering Yellowing, cracking, swelling and rotting are key signs of over-watering a cactus or succulent. Remedy by letting them dry out and then following the proper watering guidelines. Damage by over-watering happens very rapidly and is often irreversible.
Frequency of Watering As a general rule, water cactus and succulents twice a month when the weather is above 90 degrees Fahrenheit (30 degrees Celsius). Please remember to take rain into consideration. During monsoon, the humidity is up and there is typically more rain. If so, reduce watering to once per month. During the winter, the ground does not dry out nearly as quickly as it does in the summer. Watering should be reduced to once a month or not at all depending on rainfall. It is always important to let the soil dry out between watering.
Cacti and Succulents in Pots Potted cacti and succulents will need more water than if planted in the ground. Make sure all potted cacti and succulents are planted in pots with drainage holes and in sandy well draining soil. This will help prevent over-watering. They should be watered once to twice weekly during the months over 90 degrees Fahrenheit (30 degrees Celsius). Make sure soil is allowed to dry out between watering. During cooler months reduce watering accordingly. Remember, a good rule of thumb is to let the soil dry out between watering. In most cases you can correct damage due to under-watering. Over-watering typically kills the plant!
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Dummer. ゛☀
2017年09月22日
Dummer. ゛☀
For a typical leafy plant, for good growth you keep the soil moist and don’t skimp on the watering. When dealing with succulent plants, different rules apply. Succulent plants store extra water in their leaves, roots or stems to survive long periods of heat and no rainfall. If you are overly generous, they fill up their water storage tissues, become bloated and can actually split open. Soil kept too wet prevents air from reaching the roots, and they die, leading to soft rot.
Diagnosing Overwatering The main cause of potted plant death is overwatering, and this is especially true for succulents. You can usually tell an overwatered succulent by its puffy-looking stems or leaves. The plant can also look generally unhealthy. Reduce the watering and see if the plant responds. When the roots die from too-wet soil, the plant can look like it needs water, with shriveled leaves and no new growth. It does need water, but it has no live roots and can’t take water up. Unpot the plant and check for healthy roots. If the roots are alive and the soil is dry, give the plant water and it should respond. If the roots are dead and the soil is wet, your succulent is in trouble.
Treating Overwatered Succulents If rot organisms have invaded the stem of the succulent plant through the roots and mushy areas are present, you can amputate the rot if it is limited in occurrence. Use a sharp knife dipped in alcohol, and excise the rotten tissue until all you see is clean and white. Put the treated plant where it gets bright light and good air circulation, let the wounds heal, then try re-rooting it in well-draining mix. Discard all infected materials, and disinfect the tools and work area. If the plant is mushy inside, discard it and the soil instead of composting them.
Good Watering Practices Prevent overwatering by watching your succulents for growth cycles. When succulents are growing, they thrive on thorough watering alternating with partial drying out of the soil. When they are dormant they don’t use much water and the soil needs to be drier. Most succulents grow in spring and summer, but some grow in winter. The top layers of soil will tell you when your succulent needs water. Put your finger in the pot and feel if the soil 1 to 2 inches down in the pot is dry or moist. Don’t water if you feel moisture. When plants are dormant, dry soil should extend at least halfway down the pot. For spiny plants, use a chopstick or a wooden pencil as a probe, and check the tip for moist soil particles. If you are in doubt, don’t water the plant. Succulents can recover from underwatering, but you can’t take extra water out of the plant.
Soil Mix A well-draining soil mix goes a long way to keep from overwatering succulents. Use a commercial cactus and succulent potting soil mix or make your own, combining equal parts of an organic element such as compost or peat, coarse horticultural-grade sand, and a gritty element such as horticultural pumice, perlite or lava fines. To help the potting mix dry out more quickly, give succulents a pot they can just comfortably fit in plus 1 inch (2.5 cm) of extra space. Repot them yearly as they grow into just the next pot size.
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Dummer. ゛☀
2017年09月22日
Dummer. ゛☀
Crassula ovata, commonly known as Jade Plant or Money Plant, is probably the most widely grown succulent houseplant in the world. It is popular because it is very easy to grow and because it is said to bring good fortune and money. Jade Plants do make excellent houseplants, but can also grow up to 10 feet (3 m) high if planted outdoors and can even be pruned into an exotic hedge. Jade Plants have few problems in cultivation, but yellowing leaves are often an early sign that something is wrong.
Overwatering As succulents, Jade Plants only need to be watered when the soil in their pot has dried out completely. If you keep your Jade Plant on a windowsill, watering it once every 2 weeks should be enough. Do not keep the pot standing in a saucer that catches excess water as this will waterlog the soil and quickly rot a Jade Plant’s roots, killing the whole plant. If the leaves on your Jade Plant are plump but turning yellow, reduce the amount and frequency of water. If you repot a Jade Plant, transfer it to a pot that is only slightly larger, as excess soil will act like a sponge and retain water around the roots.
Underwatering A completely neglected and underwatered Jade Plant will eventually lose leaves in a bid to reduce the amount of water it transpires. An underwatered Jade Plant will have wrinkled, leathery leaves that are not shiny, while a healthy plant has glossy, smooth leaves. A thorough watering will soon rehydrate the plant and promote new leaf growth.
Overfertilizing Succulent plants need very little fertilizer; too much can burn a Jade Plant’s roots and cause the leaves to turn yellow and drop. Use standard houseplant fertilizer at one quarter strength once a month or use a specialized succulent fertilizer.
Underfertilizing WhileJade Plants will tolerate a lot of neglect, a potted plant will eventually be unable to get any more nutrition from its soil and will start to suffer. If all the leaves on your Jade Plant are very pale green or yellow, it might need to be fertilized with a special succulent fertilizer enriched with micronutrients or with bonemeal.
Natural Causes Jade Plants that are not pruned will shed old leaves every year before their dormant winter phase. These leaves, generally large, older ones at the base of the stems, will first turn yellow and then drop off. This is a natural process and not a sign that there is a problem with your plant.
Other Causes Do not use leaf shine products on your Jade Plant as they block up the pores on the leaves and suffocate the plant, causing the leaves to yellow and die. If you have recently moved your Jade Plant to a new spot, check to make sure it is not exposed to cold drafts and that it is receiving plenty of light.
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Dummer. ゛☀
2017年09月22日
Dummer. ゛☀
Succulents are hardy plants that add a striking appearance to any garden or home. Performing best in U.S. Department of Agriculture hardiness zones 3 through 9, succulents are good plants for the novice and expert gardener alike, as they require little attention. Because succulents are desert plants, they should be watered sparingly. Succulents are typically not susceptible to insect or pest infestation, but overwatering can lead to root or stem rot, a preventable and easily fixable disease. Succulents with signs of root or stem rot should be treated immediately.
1. Check the plant for infected areas. These typically appear as dark brown to black spots or areas on the low part of the plant. Other signs of root or stem rot include puckered flesh with a dark tint around the infected area. 2. Stop watering a plant with rot. Remove the plant from its pot. Remove the soil mixture and clean out the pot thoroughly to ensure no remnants of the fungus are left.
3. Cut the infected black stem from the plant with a garden knife. Let the healthy portion of the plant dry naturally for several hours, keeping the succulent out of direct sunlight during this process. If other areas of the plant are showing minimal signs of rot, keep an eye on the plant. Succulents can recover from stem rot if properly watered and placed in a warm, dry location. 4. Using the cleaned out pot or a fresh one, combine equal parts soil, coarse sand and peat moss. Don’t reuse any of the materials used with the infected plant.
5. Pour roughly 2 inches (5 cm) of the mixture into the pot. Place the newly doctored succulent into the pot with the roots lying on top of the soil. Fill the pot with the soil mixture until it reaches the base of the stems. Firmly pat the soil around the plant. 6. Place the succulent in a brightly lit spot with warm temperatures. Succulents prefer dry climates, so don’t place the plant in a humid location. 7. Water the plant with just enough water to moisten the soil one week after repotting. After the soil has completely dried out, you can water more thoroughly.
Tip Succulents grow best in well-drained soils that provide a high water-holding capacity. Planting succulents in a clay pot with a drainage hole ensures there is no sitting water and that the soil dries out between waterings. Succulents are dormant during the winter and should only be watered lightly at this time.
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Dummer. ゛☀
2017年09月22日
Dummer. ゛☀
Cacti are easy-care houseplants because their feeding and watering needs are extremely low. You can largely ignore them and they still thrive. But if you’re a chronic overwaterer, cacti may be a source of endless frustration. When your cactus has clearly been overwatered, don’t fear — there is a chance you can save it. If there is no fungal or bacterial rot present, a change of neighborhoods may be enough to get your cactus back on track.
Damage Assessment If you suspect overwatering and damage, such as soft brown spots, are obvious on the outside of the cactus, unpot the plant by wrapping a few layers of newspaper around it and tipping the cactus out. Carefully brush the soil from the roots and check them for brown or black areas. Extensive damage may be difficult to fix, but if most of the roots are still white, you’re in good shape. Cut away the black and brown roots and leave the cactus out of its pot to dry. If brown or black rot areas are extensive, you will need to reroot the cactus. A cactus that has only been occasionally overwatered will recover without further drama.
Encourage Drainage When overwatering is a chronic problem, help the cactus to shed as much water as quickly as possible in the future. Select an unglazed clay pot only slightly bigger than the cactus and fill it with a commercial cactus mix. Pot the cactus in the mix gently, so you don’t upset its delicate roots. The clay pot will wick away more water from the root zone while the loose cactus mix allows water to drain quickly and completely. You should only plant very large landscape cacti directly in the ground because landscape plantings give you less control over drainage.
Rerooting When roots or tissues are extensively damaged from overwatering, use a sharp, clean knife to cut away all the rot from the cactus. Even a small portion of healthy tissue can regenerate a whole plant, but if you leave the rot behind, it may continue to spread. Allow the cactus to dry on the counter for several days until a thick scab forms on the cut sections. Place the remaining cactus section into a clay pot with cactus soil and bury it about 1 inch (2.5 cm) deep unless there isn’t much of the cactus left — in that case, bury it about halfway. Don’t water the cactus for the first week, and only water sparingly after that until new growth appears.
Proper Watering Once your cactus is repotted and ready for success, correct watering is vital to prevent new problems. Only water cacti when the top 1 to 2 inches (2.5 to 5 cm) of the soil — depending on the size of the cactus — is completely dry. Do not water the plant from the bottom and never leave it sitting in a saucer of water. It is much better for cacti to be dry than to be wet — a good rule of thumb is to water about once every 10 days.
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Dummer. ゛☀
2017年09月22日
Dummer. ゛☀
Succulents are marvels of nature that store extra water in their leaves, stems, or roots. Because they have the reputation for growing in arid conditions, many people fail to realize that when we bring them into our home and garden environments, they do need to be watered regularly. We share what you need to know on how to water succulents and keep them thriving.
How to Water Succulents Indoors Rather than giving your succulents sips of water here and there, give them a good soaking — to the point the water runs out the drainage holes at the bottom of the pot. Be sure to empty the water that runs into the saucer beneath the plant pot. Then let the soil dry out completely before watering again.
Sedums, Hens and Chicks, Jade Plants, Kalanchoe, Aloe vera, and Sansevieria are popular choices for indoor plants. Succulents also include cacti, which, generally, may need less water than other succulents. Succulents like well-drained soil. A good quality potting soil mixed with either a material such as perlite will help ensure good drainage. In addition to quality potting media, make sure your containers have drainage holes, because too much moisture can result in rotten roots.
Succulents require more water in the early spring when the plant is growing. Water needs may lessen in the summer and even more so during the winter. When the light decreases during the winter months and most succulents are in a dormant period, their water requirements also decrease. During winter, water your succulents when the soil is dry. This could be as infrequently as once per month but will depend on your conditions.
The frequency of watering will also depend on the light and growing conditions in your area, as well as the size of the container. The larger the container, the more moisture it can hold. Small, shallow pots may need to be watered more frequently. How to Water Succulents in Outdoor Containers Summer is a good time to move potted succulents outdoors. Though they love sun, give them a chance to acclimate to outdoor conditions by placing them in a partially shaded area before moving to a sunnier location. Keep them out of intense sunlight from late morning to mid afternoon. Outdoor plants generally require more water than indoor plants. Again, your conditions will dictate how often succulents will need water. Start by checking on a weekly basis, paying attention to the condition of the potting media and whether it’s bone dry or moist.
Succulents, including cacti, which are grown in shallow containers, may need water every few days. How to Water Succulents in the Ground Succulents, particularly Sedums, grow quite well in the ground. They, too, may need to be watered weekly, depending on conditions. Established plants will have a stronger root system and tolerate dry conditions much better than new plants.
Whether you grow hardy or annual succulents, they need to be in well-drained soil. Standing water is a prescription for disaster. As with houseplants, soil conditions and water needs go hand-in-hand.
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