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Black rose
Black rose
Black rose
Black rose
Black rose
Black rose
Black rose
Aeonium 'Zwartkop'
Also known as : Purple crest aeonium
Black rose leaves are usually black, clustered, and terminal on the apexes of bare stems. They look like blooming fireworks. In the heat of summer, black rose goes into dormancy, shedding its old leaves and only keeping a few new ones. These leaves curl toward their points of growth and make the plant look like a black rosebud ready to bloom. During the dormancy period, water supply should be reduced to help the plant survive the summer.
Hardiness Zones
Hardiness Zones
9 to 11
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care guide

Care Guide for Black rose

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Watering Care
Watering Care
Drought-tolerant. Allow the soil to dry completely between watering.
Details on Watering Care Watering Care
Fertilizing Care
Fertilizing Care
The black rose doesn't need much fertiliser, in fact, too much can do it harm. Take care of the black rose by applying a balanced slow-release liquid fertiliser every second month through spring and summer.
Details on Fertilizing Care Fertilizing Care
Pruning
Pruning
Deadhead (or remove) withered flowers after flowering.
Details on Pruning Pruning
Soil Care
Soil Care
Acidic, Neutral, Alkaline
Details on Soil Care Soil Care
Repotting
Repotting
Both
Details on Repotting Repotting
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Black rose
Water
Water
Every 3 weeks
Hardiness Zones
Hardiness Zones
9 to 11
Planting Time
Planting Time
Spring, Summer, Fall
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Questions About Black rose

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Watering Watering Watering
Sunlight Sunlight Sunlight
Temperature Temperature Temperature
Fertilizing Fertilizing Fertilizing
What is the best way to water my Black rose?
The proper way to water Black rose requires some timing. For example, you should wait until the spring, when the new leaves are beginning to grow, before considering adding water to this plant’s pot. Once that season arrives, you can add water when the soil inside the pot has become entirely dry. When watering, you can use either tap water or distilled water. It's best not to water this plant from overhead. Instead, you should water at the base of the plant by applying the water slowly and evenly across the entire surface of the soil. This method will allow you to moisten all parts of the soil consistently without dampening the above-ground portions of the plant, which your Black rose will appreciate. Typically, you can continue adding water until you notice a light stream of excess water draining from the pot’s hole.
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What should I do if I water my Black rose too much or too little?
An overwatered Black rose is a far more common occurrence than one that is underwatered. Overwatering is also incredibly detrimental to your plant's health as it can cause one Black rose to die quite quickly. One way to avoid overwatering is to allow the soil to dry entirely before adding water, as mentioned previously. Especially when it turns into dormancy, lots of people will just water it in the wrong way. As such, we’ll focus on how to remedy the problem of overwatering. When your Black rose shows signs of overwatering, it is often best to remove it from its current pot. After removal, you should access the roots of this plant and remove any that show signs of rot or some other moisture-related disease. While some roots should be removed, others will return to full health after a simple cleaning. After this stage, you should repot your Black rose in soil that has excellent drainage capabilities to lessen the odds of future overwatering. While unlikely, underwatering can take place too. If that occurs for you, all you need to do is supply your plant with water on a slightly more frequent basis, ensuring that you don't overcorrect the issue and end up overwatering your plant.
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How often should I water my Black rose?
As a succulent plant, the water needs of Black rose are quite low compared to most other plants because this plant hails from a region that is constantly hot and dry. To give this plant species proper care, you should allow its soil to dry out completely between waterings. Typically, it will take anywhere from two weeks to a month for the soil to dry entirely, at which time you can add water. Watering frequency tends to be very seasonally related. During the spring to summer period, it will be in a growing state and it may take 2-3 weeks for the soil to dry completely, you can follow this watering frequency. During the summer time, the soil may dry out faster. However, when the temperature falls below 60 degrees or rises above 85 degrees Fahrenheit, most of them will be dormant or semi-dormant, which means that the plant does not need more watering at the moment. Instead, you should reduce or even stop watering to keep the soil dry until the temperature is appropriate again for Black rose to grow, and then restart watering.
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How much water does my Black rose need?
Overall, Black rose does not need a high volume of water. This is mainly due to the fact that this plant must go for a while without receiving water. However, when the time to water this plant does arrive, you should be ready to give it a lot of water. While there is no set amount of water to give this plant, you should not stop watering until the soil is completely moist. The best way to ensure this is the case, provided you grow this plant in a pot, is to water it until you see water trickling through the drainage holes at the bottom of the pot. You can also insert a pencil or some similar object deep into the soil to test if you have watered enough. If you remove the pencil and it is moist, then you have provided enough water.
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How can I tell if i'm watering my Black rose enough?
Generally, overwatering is a far more significant issue than underwatering is. When overwatering occurs, you should notice right away as the leaves will begin to lose their form, become mushy, and change colors. This will be a stark contrast to a healthy set of living stone leaves, which should be relatively sturdy and hold their shape. Underwatering is incredibly rare for Black rose, as this species can often survive with no water at all. However, if underwatering does occur, you will usually notice leaf discoloration and dryness.
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How should I water my Black rose through the seasons?
As mentioned, Black rose needs the most water during the times of year that it is actively growing. By contrast, in winter, when the plant is entirely dormant, you should reduce these already low watering needs. In fact, during winter, you should not water this plant at all. Once spring arrives, wait until your Black roses begin to develop new leaves. Once that occurs, you can return to your regular watering schedule. During the hottest parts of summer, your plant may enter another dormant growth phase, which means its water needs will be lower than normal. As summer ends and fall arrives, you can begin reducing your watering in anticipation of winter. By the time winter arrives, you should cease watering altogether.
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How should I water my Black rose at different growth stages?
By and large, the water needs of Black rose will remain consistent throughout each of its growth stages. Anyway, Black rose prefers dry soil conditions more than moist ones, so watering less is safer for it than watering a lot. However, there are some phases in which your Black rose may need slightly more water than usual. Despite being known for their foliage, Black roses can also provide flowers, but these flowers do not arrive until the plant is at least a few years old. Once flower development is possible, your Black rose may need a minimal uptick in its watering schedule to accommodate flower development. Otherwise, you should not expect to change your watering frequency significantly based on this plant’s growth stages.
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What's the difference between watering Black rose indoors and outdoors?
Growing Black roses outdoors is not an option for most gardeners in hardiness zones colder than zone 9, as this plant loves areas that have warm or hot weather year-round. Only in regions that do not have yearly temperatures that fall below 40 degrees Fahrenheit can this plant species survive. If you live in such an area, you should study the average rainfall in your area as well. If you live where it rains often, your Black rose will likely die from overwatering. But if you live in a warm climate in which it rains occasionally, you may not need to water your Black roses at all. Those who live in cooler areas of the world should have no issue growing this plant indoors. If that is the approach you take, you can wait until all of the soil in your plant's container has dried out while also following the rest of the general watering advice we've laid out in the sections above.
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Key Facts About Black rose

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Attributes of Black rose

Lifespan
Perennial
Plant Type
Succulent, Herb
Planting Time
Spring, Summer, Fall
Bloom Time
Spring, Mid winter, Late winter
Plant Height
60 cm
Spread
60 cm
Leaf Color
Purple
Black
Flower Size
15 cm to 20 cm
Flower Color
Yellow
Stem Color
Purple
Black
Red
Yellow
Dormancy
Summer dormancy
Leaf type
Evergreen
Ideal Temperature
20 - 38 ℃

Symbolism

Ageless, youthful

Usages

Garden Use
The long grey stems and unusual terminal rosettes of leaves on the black rose succulent makes a striking display, and they are frequently planted in coastal gardens. In addition, the yellow flowers at the ends of the stems contrast with the dark leaves for an unusual and exotic look that is especially appealing in Mediterranean gardens and rock gardens. You can also grow this plant in containers.

Scientific Classification of Black rose

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pests

Common Pests & Diseases About Black rose

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Common issues for Black rose based on 10 million real cases
Leaf rot
Leaf rot Leaf rot
Leaf rot
Leaf rot is a fungal disease that poses significant stress to Black rose, leading to discoloration, wilting, and ultimate decay of leaves. The disease hampers the plant's photosynthesis, growth, aesthetics, and overall health, resulting in a reduction of plant value.
Scars
Scars Scars
Scars
Any light-colored markings that appear on stems but which do not enlarge or multiply are simply scars that have healed.
Solutions: Each source of scarring requires a different approach to help your plant recover. Protect the trunk and leaves from physical damage like scrapes. If pests or disease are the cause of scarring, isolate the plant from others to avoid further spread. Some pests can be removed with organic remedies such as a soft cloth and soapy water solution or diluted isopropyl alcohol spray. Stop sunburn by moving your plant away from direct sunlight and making sure it has the water it needs. Frequent leaf or bud loss may be due to insufficient light or nutrients.
Brown spot
Brown spot Brown spot
Brown spot
This infection can cause brown spots or patches to appear on the plant.
Solutions: In minor cases of brown spot, there isn’t any need to treat the disease. However, if much of the foliage is affected and defoliation occurs, the plant will benefit from getting rid of the infection. It is recommended to start by applying organic treatment options, working up to the more potent synthetic, chemical fungicides if necessary. Organic options won’t kill the fungus, but will prevent it from spreading. Dissolve ½ teaspoon of baking soda and one teaspoon of liquid soap in a gallon of water. Using a spray bottle, spray on tops and bottoms of leaves until the mixture drips off. Repeat every two weeks until existing spots stop enlarging and new spots no longer appear. Spray a copper-based fungicidal soap on the leaves, coating the top and bottom leaf surfaces. Reapply as directed on the product label. Copper penetrates the leaf surface and prevents germination of spores so the fungus cannot spread. Apply an all-purpose fungicide to the entire plant, following the label instructions carefully.
Flower withering
Flower withering Flower withering
Flower withering
Flowers may dry out due to a sudden change in environment or because the plant has completed its normal flowering period.
Solutions: If flower withering is a natural progression due to age, there is nothing that can be done to slow or stop the process. Once hormones within the plant begin the process of senescence, it’s irreversible. For lack of water, immediately water the plant using room temperature rainwater, bottled spring water, or filtered tap water. Water container plants until excess water drains out the bottom; water in-ground plants until the soil is soaked but there isn’t standing water on the surface. In the event of nutritional deficiencies, the best solution is to use a granular or water-soluble liquid fertilizer, and apply it to the soil at about half the recommended dosage. Keep it off the leaves and make sure granular products are watered into the soil well. If the plant is infected with a bacterial or fungal pathogen, there is no course of treatment that cures the diseased plants. The best solution is to remove the infected plants and dispose of the plant material off-site. Do not put in a compost pile.
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Leaf rot
Overview
Symptom
Causes
Treatment
Prevention
Active Period
What is Leaf rot Disease on Black rose?
What is Leaf rot Disease on Black rose?
Leaf rot is a fungal disease that poses significant stress to Black rose, leading to discoloration, wilting, and ultimate decay of leaves. The disease hampers the plant's photosynthesis, growth, aesthetics, and overall health, resulting in a reduction of plant value.
Symptom Analysis
Symptom Analysis
Leaf rot on Black rose presents as browned leaf tips surrounded by a yellowish halo. As the disease progresses, the entire leaf turns black and mushy, indicating severe decay. The rosette structure of Black rose also appears deformed.
What Causes Leaf rot Disease on Black rose?
What Causes Leaf rot Disease on Black rose?
1
Fungal pathogens
Phytophthora and Pythium species are principally involved. These pathogens thrive in damp, poorly-drained soils.
2
Overwatering
Excessive moisture facilitates the fungi development and spreading over Black rose.
3
Poor sanitation
Debris and dead plant material often harbor pathogens.
How to Treat Leaf rot Disease on Black rose?
How to Treat Leaf rot Disease on Black rose?
1
Non pesticide
Watering adjustment: Moderate the watering, ensuring the soil dries out between watering events.

Soil improvement: Improve drainage by using sandy, well-draining soil or elevate the plant for better water runoff.

Sanitation: Remove and dispose of all infected leaves and plants.

Quarantine: Isolate newly-purchased Black rose to prevent disease spread.
2
Pesticide
Fungicide application: Treat the area with fungicides specific for Phytophthora and Pythium species. Apply them as per manufacturer’s instructions.

Systemic treatments: Use systemic treatments to kill fungi internally.
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Scars
plant poor
Scars
Any light-colored markings that appear on stems but which do not enlarge or multiply are simply scars that have healed.
Symptom Analysis
Symptom Analysis
Scars form when the plant repairs wounds. They can be the result of people or pets passing by and scraping the plant. Once the underlying issue is resolved, the plant will heal but a scar may remain.
Pests and pathogens can also cause scarring. Insects may attack the plant for a meal, resulting in extensive scarring when a few invaders turn into an infestation. Diseases such as fungus and bacteria can weaken the plant, causing brown spots, mushy areas, or blisters that lead to scars.
Scars occur on stems when a leaf or bud has been lost and the plant has healed. The harder tissue is like a scab that protects a wound.
On other occasions, scars can signal problems from environmental conditions, such as overexposure to sunlight or heat. It might surprise you to know that plants can suffer from sunburn, even desert dwellers like cactus!
Solutions
Solutions
Each source of scarring requires a different approach to help your plant recover.
  1. Protect the trunk and leaves from physical damage like scrapes.
  2. If pests or disease are the cause of scarring, isolate the plant from others to avoid further spread. Some pests can be removed with organic remedies such as a soft cloth and soapy water solution or diluted isopropyl alcohol spray.
  3. Stop sunburn by moving your plant away from direct sunlight and making sure it has the water it needs.
  4. Frequent leaf or bud loss may be due to insufficient light or nutrients.
Prevention
Prevention
Preventing some sources of scarring is easier than others, but all start with careful attention to your plants once you decide to bring them home.
  1. Review specific guidelines for your plant, including soil drainage, watering, and fertilizer requirements.
  2. Inspect plants before planting and use sterile pots and fresh potting soil or media to limit transfer of fungi or bacteria.
  3. Once established, check your plants regularly for signs of scarring or the presence of pests, as it is better to catch problems as early as possible.
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Brown spot
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Brown spot
This infection can cause brown spots or patches to appear on the plant.
Overview
Overview
Discolored spots on the foliage of plants are one of the most common disease problems people observe. These spots are caused by fungal and bacterial diseases, with most infections related to a fungal pathogen.
Brown spot can occurs on all houseplants, flowering ornamentals, vegetable plants, and leaves of trees, bushes, and shrubs. No plants are resistant to it, and the problem is worse in warm, wet environments. It can occur at any point in the life stage as long as leaves are present.
Small brownish spots appear on the foliage and enlarge as the disease progresses. In severe cases, the plant or tree is weakened when the lesions interrupt photosynthesis or cause defoliation.
Symptom Analysis
Symptom Analysis
In most cases, brown spot only affects a small percentage of the whole plant, appearing on a small amount of the leaves. A small infection only puts minor stress on the plant. However, if left untreated and the disease progresses over numerous seasons, it will severely impact the health and productivity of the infected specimen.
  • Sporulation begins (reproduction of the fungal spores), and tiny spots appear on leaves.
  • Placement is often random and scattered as diseases are spread through raindrops.
  • May appear on lower leaves and the interior of the plant where humidity is higher.
  • Brown spots enlarge and grow large enough to touch neighboring spots to form a more prominent blotch.
  • Leaf margins may turn yellow.
  • Tiny black dots (fruiting bodies of the fungi) appear in the dead spots.
  • Blotches grow in size until the entire leaf is brown.
  • The leaf falls off the plant.
Severe Symptoms
  • Partial or complete premature defoliation
  • Reduced growth
  • Increased susceptibility to pests and other diseases
Disease Cause
Disease Cause
Brown spot, or leaf spot, is a common descriptive term given to several diseases affecting the leaves of plants and trees. Around 85% of diseases exhibiting leaf spots are due to fungus or fungus-like organisms. Sometimes brown spot is caused by a bacterial infection, or insect activity with similar symptoms.
When conditions are warm and the leaf surfaces are wet, fungal spores being transported by wind or rain land on the surface and cling to it. They do not rupture the cell walls but grow in the space between the plant plasma membrane and the plant cell wall. As the spores reproduce, they release toxins and enzymes that cause necrotic spots (i.e., dead tissue) on the leaves, allowing the fungi to consume the products released when the cells degrade.
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Flower withering
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Flower withering
Flowers may dry out due to a sudden change in environment or because the plant has completed its normal flowering period.
Overview
Overview
Flower withering occurs when flowers become weak, droopy, wilted, or faded until they can’t be revived. During withering, they begin to wrinkle and shrink until the flower becomes completely dry or dead.
Any flowers, regardless of the plant type or the climate they are grown in, are susceptible to withering. It is a worldwide problem across houseplants, herbs, flowering ornamentals, trees, shrubs, garden vegetables, and food crops.
Unlike wilting—which withering is often confused with—withering can be caused by different things and is often due to more than a lack of water. Withering can be fatal in severe cases.
Symptom Analysis
Symptom Analysis
Flower withering progresses from very mild cases to severe occurrences that kill the flower. The severity of the symptoms is related to the cause and how long the condition is allowed to progress before action is taken.
  • Wilted, droopy flowers
  • Petals and leaves begin to wrinkle
  • Brown papery streaks or spots appear on the petals and leaf tips
  • Flowerhead shrink in size
  • Petal color fades
  • Yellowing leaves
  • Complete death of the flower
Disease Cause
Disease Cause
The main causes of flower withering include natural age progress, lack of water, nutritional deficiencies, and bacterial or fungal diseases. It’s critical to determine the underlying cause when flower withering is noticed. This will guide the best course of action, if treatment is possible.
Check the soil for moisture and then closely examine the entire plant for signs of nutrient deficiencies. If neither of those appears to be the cause then cut open the stem below a flower. If a cross-section reveals brown or rust-colored stains it is safe to assume that this is a bacterial or fungal infection.
If the flower is nearing the end of its normal lifespan, genetic coding within the plant increases the production of ethylene, a phytohormone that controls senescence, or cell aging and death. Cell division stops and the plant begins breaking down resources within the flower to use in other parts of the plant.
In all other cases, flower withering happens when the plant seals off the stem as a defense mechanism, stopping transport within the vascular system. This prevents further water loss through the flowers but also stops bacteria and fungi from moving to healthy parts of the plant. Once water and nutrient transport stops, the flower begins to wither and ultimately die.
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More Info on Black Rose Growth and Care

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Basic Care Guide
Common Pests & Diseases
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Lighting
Full sun
For optimal growth, black rose prefers generous exposure to sunlight, although it can withstand moderate light exposure. It originates from environments where clear skies are somewhat regular, ensuring adequate light for photosynthesis. Too much or too little light influence can stress the plant, potentially causing stunted growth or pale foliage.
Best Sunlight Practices
Transplant
12-18 inches
The ideal season to transplant black rose is from early summer to late summer or late fall to early winter, as the plant establishes itself best during these periods. Ensure black rose is placed in a sunny, well-draining location. Be gentle when handling the roots to avoid damage. Happy transplanting!
Transplant Techniques
Temperature
0 - 43 ℃
The black rose plant prefers a temperature range of 68 to 100 ℉ (20 to 38 ℃). It is native to regions with warm, dry summers and mild winters. During the summer months, it may benefit from some shade to avoid excessive heat. In the winter, temperatures below 50 ℉ (10 ℃) may cause the plant to go dormant.
Temp for Healthy Growth
Overwinter
0 - 43 ℃
Black rose originates from the warm, arid landscapes of the Canary Islands. Its natural propensity to go dormant in winter conserves energy and water. However, given its Mediterranean roots, black rose is frost-intolerant, requiring indoor protection or a heated greenhouse in colder climates. A well-drained soil is crucial to prevent water-logging and subsequent root rot during this rest period.
Winter Techniques
Leaf rot
Leaf rot is a fungal disease that poses significant stress to Black rose, leading to discoloration, wilting, and ultimate decay of leaves. The disease hampers the plant's photosynthesis, growth, aesthetics, and overall health, resulting in a reduction of plant value.
Learn More About the Disease
Feng shui direction
North
The black rose brings a dark, rich hue that offers a strong grounding energy to your space. This plant is well-suited facing North, as it reflects the water element typical of this direction. However, its affinity can indeed be personal, pending factors of the immediate surrounding and individual Qi flows.
Fengshui Details
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Plants Related to Black rose

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Tea tree
Tea tree
Tea tree (Melaleuca alternifolia) is a native tree of Australia and will grow to 6 m tall. Commonly found growing along streams and waterways, it has a bushy crown and thin-white paper-like bark. Oil from the leaves of this tree is commonly known as tea tree oil. Blooms from spring to summer with fluffy white flowers. Thrives in full sun and prefers moist, well-drained soil.
Baseball plant
Baseball plant
The baseball plant is a thornless ball that resembles a baseball in appearance. Its smooth sage-green skin has reddish-brown stripes running across it, almost as if it were wearing clothes made from a fabric with delicate, geometric, dark-print patterns, making it extremely distinctive.
Maidenhair vine
Maidenhair vine
Maidenhair vine (Muehlenbeckia complexa) is a semi-deciduous vine that can grow to 4.5 m if it is given suitable supports on which to climb. However, it is most commonly grown as a houseplant. Maidenhair vine provides interesting ground cover.
Mealycup sage
Mealycup sage
The mealycup sage needs either full or partial sun in order to thrive. It can be an annual plant when grown in temperate climates and must be planted in times without frost in less temperate climates. There are a few varieties of mealycup sage, which can produce either violet, blue or white flowers.
Coast Oxtongue
Coast Oxtongue
Coast Oxtongue (Gasteria acinacifolia) is a succulent species endemic to South Africa. Sunbirds are attracted to coast Oxtongue nectar. This is a strictly coastal species and is considered ideal for coastal gardens, as it grows the largest of all the Gasteria species. This plant has cultural value to indigenous peoples of South Africa, some of whom believe it to have magical powers.
Poorjoe
Poorjoe
Poorjoe (Hexasepalum teres) is an annual herbaceous wildflower that grows from 30 to 91 cm tall. It blooms from summer to winter with small pinkish-white flowers. It thrives in full sun with dry soil and is commonly found growing in dunes sandy roadsides and dry locations. Is considered an invasive weed in some areas.
Cape jasmine
Cape jasmine
Gardenia jasminoides is an evergreen shrub with unique, glossy evergreen leaves and stunning flowers. The sophisticated, matte white flowers are often used in bouquets. The exceptional beauty of this ornamental plant has made it a popular and highly appreciated plant amongst gardeners and horticulturalists.
Golden pothos
Golden pothos
The golden pothos (Epipremnum aureum) is a popular houseplant that is commonly seen in Australia, Asia, and the West Indies. It goes by many nicknames, including "devil's ivy", because it is so hard to kill and can even grow in low light conditions. Golden pothos has poisonous sap, so it should be kept away from pets and children.
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About
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Related Plants
Black rose
Black rose
Black rose
Black rose
Black rose
Black rose
Black rose
Aeonium 'Zwartkop'
Also known as: Purple crest aeonium
Black rose leaves are usually black, clustered, and terminal on the apexes of bare stems. They look like blooming fireworks. In the heat of summer, black rose goes into dormancy, shedding its old leaves and only keeping a few new ones. These leaves curl toward their points of growth and make the plant look like a black rosebud ready to bloom. During the dormancy period, water supply should be reduced to help the plant survive the summer.
Hardiness Zones
Hardiness Zones
9 to 11
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Questions About Black rose

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Watering Watering Watering
Sunlight Sunlight Sunlight
Temperature Temperature Temperature
Fertilizing Fertilizing Fertilizing
What is the best way to water my Black rose?
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What should I do if I water my Black rose too much or too little?
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How often should I water my Black rose?
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How much water does my Black rose need?
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How can I tell if i'm watering my Black rose enough?
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How should I water my Black rose through the seasons?
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How should I water my Black rose at different growth stages?
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What's the difference between watering Black rose indoors and outdoors?
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Key Facts About Black rose

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Feedback
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Attributes of Black rose

Lifespan
Perennial
Plant Type
Succulent, Herb
Planting Time
Spring, Summer, Fall
Bloom Time
Spring, Mid winter, Late winter
Plant Height
60 cm
Spread
60 cm
Leaf Color
Purple
Black
Flower Size
15 cm to 20 cm
Flower Color
Yellow
Stem Color
Purple
Black
Red
Yellow
Dormancy
Summer dormancy
Leaf type
Evergreen
Ideal Temperature
20 - 38 ℃
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Symbolism

Ageless, youthful

Usages

Garden Use
The long grey stems and unusual terminal rosettes of leaves on the black rose succulent makes a striking display, and they are frequently planted in coastal gardens. In addition, the yellow flowers at the ends of the stems contrast with the dark leaves for an unusual and exotic look that is especially appealing in Mediterranean gardens and rock gardens. You can also grow this plant in containers.

Scientific Classification of Black rose

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pests

Common Pests & Diseases About Black rose

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Common issues for Black rose based on 10 million real cases
Leaf rot
Leaf rot Leaf rot Leaf rot
Leaf rot is a fungal disease that poses significant stress to Black rose, leading to discoloration, wilting, and ultimate decay of leaves. The disease hampers the plant's photosynthesis, growth, aesthetics, and overall health, resulting in a reduction of plant value.
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Scars
Scars Scars Scars
Any light-colored markings that appear on stems but which do not enlarge or multiply are simply scars that have healed.
Solutions: Each source of scarring requires a different approach to help your plant recover. Protect the trunk and leaves from physical damage like scrapes. If pests or disease are the cause of scarring, isolate the plant from others to avoid further spread. Some pests can be removed with organic remedies such as a soft cloth and soapy water solution or diluted isopropyl alcohol spray. Stop sunburn by moving your plant away from direct sunlight and making sure it has the water it needs. Frequent leaf or bud loss may be due to insufficient light or nutrients.
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Brown spot
Brown spot Brown spot Brown spot
This infection can cause brown spots or patches to appear on the plant.
Solutions: In minor cases of brown spot, there isn’t any need to treat the disease. However, if much of the foliage is affected and defoliation occurs, the plant will benefit from getting rid of the infection. It is recommended to start by applying organic treatment options, working up to the more potent synthetic, chemical fungicides if necessary. Organic options won’t kill the fungus, but will prevent it from spreading. Dissolve ½ teaspoon of baking soda and one teaspoon of liquid soap in a gallon of water. Using a spray bottle, spray on tops and bottoms of leaves until the mixture drips off. Repeat every two weeks until existing spots stop enlarging and new spots no longer appear. Spray a copper-based fungicidal soap on the leaves, coating the top and bottom leaf surfaces. Reapply as directed on the product label. Copper penetrates the leaf surface and prevents germination of spores so the fungus cannot spread. Apply an all-purpose fungicide to the entire plant, following the label instructions carefully.
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Flower withering
Flower withering Flower withering Flower withering
Flowers may dry out due to a sudden change in environment or because the plant has completed its normal flowering period.
Solutions: If flower withering is a natural progression due to age, there is nothing that can be done to slow or stop the process. Once hormones within the plant begin the process of senescence, it’s irreversible. For lack of water, immediately water the plant using room temperature rainwater, bottled spring water, or filtered tap water. Water container plants until excess water drains out the bottom; water in-ground plants until the soil is soaked but there isn’t standing water on the surface. In the event of nutritional deficiencies, the best solution is to use a granular or water-soluble liquid fertilizer, and apply it to the soil at about half the recommended dosage. Keep it off the leaves and make sure granular products are watered into the soil well. If the plant is infected with a bacterial or fungal pathogen, there is no course of treatment that cures the diseased plants. The best solution is to remove the infected plants and dispose of the plant material off-site. Do not put in a compost pile.
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Leaf rot
Overview
Symptom
Causes
Treatment
Prevention
Active Period
What is Leaf rot Disease on Black rose?
What is Leaf rot Disease on Black rose?
Leaf rot is a fungal disease that poses significant stress to Black rose, leading to discoloration, wilting, and ultimate decay of leaves. The disease hampers the plant's photosynthesis, growth, aesthetics, and overall health, resulting in a reduction of plant value.
Symptom Analysis
Symptom Analysis
Leaf rot on Black rose presents as browned leaf tips surrounded by a yellowish halo. As the disease progresses, the entire leaf turns black and mushy, indicating severe decay. The rosette structure of Black rose also appears deformed.
What Causes Leaf rot Disease on Black rose?
What Causes Leaf rot Disease on Black rose?
1
Fungal pathogens
Phytophthora and Pythium species are principally involved. These pathogens thrive in damp, poorly-drained soils.
2
Overwatering
Excessive moisture facilitates the fungi development and spreading over Black rose.
3
Poor sanitation
Debris and dead plant material often harbor pathogens.
How to Treat Leaf rot Disease on Black rose?
How to Treat Leaf rot Disease on Black rose?
1
Non pesticide
Watering adjustment: Moderate the watering, ensuring the soil dries out between watering events.

Soil improvement: Improve drainage by using sandy, well-draining soil or elevate the plant for better water runoff.

Sanitation: Remove and dispose of all infected leaves and plants.

Quarantine: Isolate newly-purchased Black rose to prevent disease spread.
2
Pesticide
Fungicide application: Treat the area with fungicides specific for Phytophthora and Pythium species. Apply them as per manufacturer’s instructions.

Systemic treatments: Use systemic treatments to kill fungi internally.
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Scars
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Scars
Any light-colored markings that appear on stems but which do not enlarge or multiply are simply scars that have healed.
Symptom Analysis
Symptom Analysis
Scars form when the plant repairs wounds. They can be the result of people or pets passing by and scraping the plant. Once the underlying issue is resolved, the plant will heal but a scar may remain.
Pests and pathogens can also cause scarring. Insects may attack the plant for a meal, resulting in extensive scarring when a few invaders turn into an infestation. Diseases such as fungus and bacteria can weaken the plant, causing brown spots, mushy areas, or blisters that lead to scars.
Scars occur on stems when a leaf or bud has been lost and the plant has healed. The harder tissue is like a scab that protects a wound.
On other occasions, scars can signal problems from environmental conditions, such as overexposure to sunlight or heat. It might surprise you to know that plants can suffer from sunburn, even desert dwellers like cactus!
Solutions
Solutions
Each source of scarring requires a different approach to help your plant recover.
  1. Protect the trunk and leaves from physical damage like scrapes.
  2. If pests or disease are the cause of scarring, isolate the plant from others to avoid further spread. Some pests can be removed with organic remedies such as a soft cloth and soapy water solution or diluted isopropyl alcohol spray.
  3. Stop sunburn by moving your plant away from direct sunlight and making sure it has the water it needs.
  4. Frequent leaf or bud loss may be due to insufficient light or nutrients.
Prevention
Prevention
Preventing some sources of scarring is easier than others, but all start with careful attention to your plants once you decide to bring them home.
  1. Review specific guidelines for your plant, including soil drainage, watering, and fertilizer requirements.
  2. Inspect plants before planting and use sterile pots and fresh potting soil or media to limit transfer of fungi or bacteria.
  3. Once established, check your plants regularly for signs of scarring or the presence of pests, as it is better to catch problems as early as possible.
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Brown spot
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Brown spot
This infection can cause brown spots or patches to appear on the plant.
Overview
Overview
Discolored spots on the foliage of plants are one of the most common disease problems people observe. These spots are caused by fungal and bacterial diseases, with most infections related to a fungal pathogen.
Brown spot can occurs on all houseplants, flowering ornamentals, vegetable plants, and leaves of trees, bushes, and shrubs. No plants are resistant to it, and the problem is worse in warm, wet environments. It can occur at any point in the life stage as long as leaves are present.
Small brownish spots appear on the foliage and enlarge as the disease progresses. In severe cases, the plant or tree is weakened when the lesions interrupt photosynthesis or cause defoliation.
Symptom Analysis
Symptom Analysis
In most cases, brown spot only affects a small percentage of the whole plant, appearing on a small amount of the leaves. A small infection only puts minor stress on the plant. However, if left untreated and the disease progresses over numerous seasons, it will severely impact the health and productivity of the infected specimen.
  • Sporulation begins (reproduction of the fungal spores), and tiny spots appear on leaves.
  • Placement is often random and scattered as diseases are spread through raindrops.
  • May appear on lower leaves and the interior of the plant where humidity is higher.
  • Brown spots enlarge and grow large enough to touch neighboring spots to form a more prominent blotch.
  • Leaf margins may turn yellow.
  • Tiny black dots (fruiting bodies of the fungi) appear in the dead spots.
  • Blotches grow in size until the entire leaf is brown.
  • The leaf falls off the plant.
Severe Symptoms
  • Partial or complete premature defoliation
  • Reduced growth
  • Increased susceptibility to pests and other diseases
Disease Cause
Disease Cause
Brown spot, or leaf spot, is a common descriptive term given to several diseases affecting the leaves of plants and trees. Around 85% of diseases exhibiting leaf spots are due to fungus or fungus-like organisms. Sometimes brown spot is caused by a bacterial infection, or insect activity with similar symptoms.
When conditions are warm and the leaf surfaces are wet, fungal spores being transported by wind or rain land on the surface and cling to it. They do not rupture the cell walls but grow in the space between the plant plasma membrane and the plant cell wall. As the spores reproduce, they release toxins and enzymes that cause necrotic spots (i.e., dead tissue) on the leaves, allowing the fungi to consume the products released when the cells degrade.
Solutions
Solutions
In minor cases of brown spot, there isn’t any need to treat the disease. However, if much of the foliage is affected and defoliation occurs, the plant will benefit from getting rid of the infection. It is recommended to start by applying organic treatment options, working up to the more potent synthetic, chemical fungicides if necessary.
Organic options won’t kill the fungus, but will prevent it from spreading.
  1. Dissolve ½ teaspoon of baking soda and one teaspoon of liquid soap in a gallon of water. Using a spray bottle, spray on tops and bottoms of leaves until the mixture drips off. Repeat every two weeks until existing spots stop enlarging and new spots no longer appear.
  2. Spray a copper-based fungicidal soap on the leaves, coating the top and bottom leaf surfaces. Reapply as directed on the product label. Copper penetrates the leaf surface and prevents germination of spores so the fungus cannot spread.
  3. Apply an all-purpose fungicide to the entire plant, following the label instructions carefully.
Prevention
Prevention
Like many other diseases, it is easier to prevent brown spot than cure it, and this is done through cultural practices.
  • Clear fall leaves from the ground before winter to minimize places where fungi and bacteria can overwinter.
  • Maintain good air movement between plants through proper plant spacing.
  • Increase air circulation through the center of plants through pruning.
  • Thoroughly clean all pruning tools after working with diseased plants.
  • Never dispose of disease plant material in a compost pile.
  • Avoid overhead watering to keep moisture off of the foliage.
  • Keep plants healthy by providing adequate sunlight, water, and fertilizer.
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Flower withering
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Flower withering
Flowers may dry out due to a sudden change in environment or because the plant has completed its normal flowering period.
Overview
Overview
Flower withering occurs when flowers become weak, droopy, wilted, or faded until they can’t be revived. During withering, they begin to wrinkle and shrink until the flower becomes completely dry or dead.
Any flowers, regardless of the plant type or the climate they are grown in, are susceptible to withering. It is a worldwide problem across houseplants, herbs, flowering ornamentals, trees, shrubs, garden vegetables, and food crops.
Unlike wilting—which withering is often confused with—withering can be caused by different things and is often due to more than a lack of water. Withering can be fatal in severe cases.
Symptom Analysis
Symptom Analysis
Flower withering progresses from very mild cases to severe occurrences that kill the flower. The severity of the symptoms is related to the cause and how long the condition is allowed to progress before action is taken.
  • Wilted, droopy flowers
  • Petals and leaves begin to wrinkle
  • Brown papery streaks or spots appear on the petals and leaf tips
  • Flowerhead shrink in size
  • Petal color fades
  • Yellowing leaves
  • Complete death of the flower
Disease Cause
Disease Cause
The main causes of flower withering include natural age progress, lack of water, nutritional deficiencies, and bacterial or fungal diseases. It’s critical to determine the underlying cause when flower withering is noticed. This will guide the best course of action, if treatment is possible.
Check the soil for moisture and then closely examine the entire plant for signs of nutrient deficiencies. If neither of those appears to be the cause then cut open the stem below a flower. If a cross-section reveals brown or rust-colored stains it is safe to assume that this is a bacterial or fungal infection.
If the flower is nearing the end of its normal lifespan, genetic coding within the plant increases the production of ethylene, a phytohormone that controls senescence, or cell aging and death. Cell division stops and the plant begins breaking down resources within the flower to use in other parts of the plant.
In all other cases, flower withering happens when the plant seals off the stem as a defense mechanism, stopping transport within the vascular system. This prevents further water loss through the flowers but also stops bacteria and fungi from moving to healthy parts of the plant. Once water and nutrient transport stops, the flower begins to wither and ultimately die.
Solutions
Solutions
If flower withering is a natural progression due to age, there is nothing that can be done to slow or stop the process. Once hormones within the plant begin the process of senescence, it’s irreversible.
For lack of water, immediately water the plant using room temperature rainwater, bottled spring water, or filtered tap water. Water container plants until excess water drains out the bottom; water in-ground plants until the soil is soaked but there isn’t standing water on the surface.
In the event of nutritional deficiencies, the best solution is to use a granular or water-soluble liquid fertilizer, and apply it to the soil at about half the recommended dosage. Keep it off the leaves and make sure granular products are watered into the soil well.
If the plant is infected with a bacterial or fungal pathogen, there is no course of treatment that cures the diseased plants. The best solution is to remove the infected plants and dispose of the plant material off-site. Do not put in a compost pile.
Prevention
Prevention
This is definitely one of those instances where prevention is more effective than cure. Here are some preventative measures for avoiding premature flower withering.
  • Water plants according to their needs -- either keep the soil slightly moist or allow the top inch or two to dry out before watering again.
  • Fertilize lightly on a consistent basis, depending upon the plant’s growth. Quick-growing plants and those that flower or develop fruit will need more frequent fertilizing than slow-growing plants.
  • Purchase plants that are certified disease- or pathogen-free.
  • Look for disease-resistant cultivars.
  • Isolate plants showing disease symptoms to prevent the spread to neighboring plants.
  • Practice good plant hygiene by removing any fallen plant material as soon as possible.
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More Info on Black Rose Growth and Care

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Lighting
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Indoor
Outdoor
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Requirements
Full sun
Ideal
Above 6 hours sunlight
Partial sun
Tolerance
About 3-6 hours sunlight
Watch how sunlight gracefully moves through your garden, and choose spots that provide the perfect balance of light and shade for your plants, ensuring their happiness.
Essentials
For optimal growth, black rose prefers generous exposure to sunlight, although it can withstand moderate light exposure. It originates from environments where clear skies are somewhat regular, ensuring adequate light for photosynthesis. Too much or too little light influence can stress the plant, potentially causing stunted growth or pale foliage.
Preferred
Tolerable
Unsuitable
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Artificial lighting
Indoor plants require adequate lighting for optimal growth. When natural sunlight is insufficient, particularly in winter or in less sunny spaces, artificial lights offer a vital solution, promoting faster, healthier growth.
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Indoor plants require adequate lighting for optimal growth. When natural sunlight is insufficient, particularly in winter or in less sunny spaces, artificial lights offer a vital solution, promoting faster, healthier growth.
1. Choose the right type of artificial light: LED lights are a popular choice for indoor plant lighting because they can be customized to provide the specific wavelengths of light that your plants need.
Full sun plants need 30-50W/sq ft of artificial light, partial sun plants need 20-30W/sq ft, and full shade plants need 10-20W/sq ft.
2. Determine the appropriate distance: Place the light source 12-36 inches above the plant to mimic natural sunlight.
3. Determine the duration: Mimic the length of natural daylight hours for your plant species. most plants need 8-12 hours of light per day.
Important Symptoms
Symptoms of Insufficient Light in %s
Black rose is a beloved choice for indoor gardening, and they require strong light to thrive. However, when placed in rooms with suboptimal lighting, they may develop symptoms of light deficiency.
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Lighter-colored new leaves
Insufficient sunlight can cause leaves to develop irregular color patterns or appear pale. This indicates a lack of chlorophyll and essential nutrients.
Leggy or sparse growth
The spaces between leaves or stems of your black rose may become longer, resulting in a thin and stretched-out appearance. This can make the plant look sparse and weak, and it may easily break or lean due to its own weight.
Faster leaf drop
When plants are exposed to low light conditions, they tend to shed older leaves early to conserve resources. Within a limited time, these resources can be utilized to grow new leaves until the plant's energy reserves are depleted.
Solutions
1. To ensure optimal growth, gradually move plants to a sunnier location each week, until they receive at least 6 hours of direct sunlight daily. Use a south-facing window and keep curtains open during the day for maximum sunlight exposure and nutrient accumulation.2. To provide additional light for your plant, consider using artificial light if it's large or not easily movable. Keep a desk or ceiling lamp on for at least 8 hours daily, or invest in professional plant grow lights for ample light.
Symptoms of Excessive light in %s
Black rose require strong light to thrive, and some are remarkably resilient to sun exposure, rarely suffering from sunburn.
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Chlorosis
Chlorosis is a condition where the plant's leaves lose their green color and turn yellow. This is due to the breakdown of chlorophyll from excessive sunlight, which negatively affects the plant's ability to photosynthesize.
Sunscald
Sunscald occurs when the plant's leaves or stems are damaged by intense sunlight exposure. It appears as pale, bleached, or necrotic areas on the plant tissue and can reduce the plant's overall health.
Leaf Curling
Leaf curling is a symptom where leaves curl or twist under extreme sunlight conditions. This is a defense mechanism used by the plant to reduce its surface area exposed to sunlight, minimizing water loss and damage.
Wilting
Wilting occurs when a plant loses turgor pressure and its leaves and stems begin to droop. Overexposure to sunlight can cause wilting by increasing the plant's water loss through transpiration, making it difficult for the plant to maintain adequate hydration.
Leaf Scorching
Leaf scorching is a symptom characterized by the appearance of brown, dry, and crispy edges or patches on leaves due to excessive sunlight. This can lead to a reduction in photosynthetic capacity and overall plant health.
Solutions
1. Move your plant to the optimal position where it can receive abundant sunlight but also have some shade. An east-facing window is an ideal choice as the morning sunlight is gentler. This way, your plant can enjoy ample sunlight while reducing the risk of sunburn.2. It is recommended to trim off any completely dehydrated or withered parts of the plant.
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Temperature
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Requirements
Ideal
Tolerable
Unsuitable
Just like people, each plant has its own preferences. Learn about your plants' temperature needs and create a comforting environment for them to flourish. As you care for your plants, your bond with them will deepen. Trust your intuition as you learn about their temperature needs, celebrating the journey you share. Lovingly monitor the temperature around your plants and adjust their environment as needed. A thermometer can be your ally in this heartfelt endeavor. Be patient and gentle with yourself as you explore your plants' temperature needs. Cherish your successes, learn from challenges, and nurture your garden with love, creating a haven that reflects the warmth of your care.
Essentials
The black rose plant prefers a temperature range of 68 to 100 ℉ (20 to 38 ℃). It is native to regions with warm, dry summers and mild winters. During the summer months, it may benefit from some shade to avoid excessive heat. In the winter, temperatures below 50 ℉ (10 ℃) may cause the plant to go dormant.
Regional wintering strategies
Winter is the growing season for Black rose, so it is important to maintain temperatures above {Suitable_growth_temperature_min} for optimal growth. When the outdoor temperature drops below {Tolerable_growing_temperature_min}, it is advisable to bring the plant indoors to a well-lit area. Increase watering when the temperature is higher and reduce watering when it approaches {Tolerable_growing_temperature_min}. If overwintering the plant outdoors, it should be placed in a sheltered area with ample sunlight. Consider setting up a temporary greenhouse for protection if the outdoor temperature is consistently low and keep the plant adequately moist.
Important Symptoms
Symptoms of Low Temperature in Black rose
Black rose is not tolerant of extremely cold temperatures. It thrives best when the temperature is between {Suitable_growth_temperature_min} and {Suitable_growth_temperature_max}. During winter, it should be kept above {Tolerable_growing_temperature_min}. When the temperature falls below {Limit_growth_temperature}, the leaves will exhibit water-soaked necrosis and wilting. In cases of mild frost damage, there may not be any initial symptoms, but after a week, the leaves will significantly wilt and eventually fall off.
Solutions
Trim off the frostbitten areas. Immediately move indoors to a warm environment or set up a makeshift greenhouse for cold protection. When placing the plant indoors, choose a location near a south-facing window to ensure ample sunlight. When using a makeshift greenhouse, pay attention to ventilation to avoid plant decay due to poor airflow.
Symptoms of High Temperature in Black rose
During summer, Black rose should be kept below {Suitable_growth_temperature_max}. When the temperature exceeds {Tolerable_growing_temperature_max}, the plant will enter a dormant state, and it becomes more prone to rot in high humidity conditions.
Solutions
Remove the dry and rotten parts. Move the plant to a partially shaded area, providing protection from direct sunlight during midday and afternoon. Stop watering the plant until the weather becomes cooler.
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