2 things to know: they will sunburn if going from little or indirect light to direct sunlight. (press gently on it with a pencil eraser). Cacti usually turn purple as a response to environmental stress. Unfortunately my cactus is turning brown and I don't know why. If it is indeed rot, then the brown tissue will be softer (not … This may sound abnormal because most of us tend to think that cacti plants are sun-loving, desert plants. Is the tipping to the side new or did this occur with the onset of the browning? Cactus rot for a number of reasons, not all of them due to over watering. From prickly pears to saguaro, there are about 1750 different species of cacti. With time, the whitish spots turn to brown scars which are a symptom of severe sunburn. And, of course, accidents happen and the spines may be knocked off the plant. If your plant is browning due to corking, there is nothing you can do about it because it is a natural process. Cactus spines change their color depending on the variety, and it is perfectly natural. Typically, if your plant starts browning and feeling brittle on one side, yet it isn’t positioned directly in a window, it is time to consider moving it to another spot. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Hi! Where Cactus Store Water To Survive In Deserts? As long as you provide it with sufficient light, air, water, drainage, and nutrients, your cactus will not only survive but also thrive. Red spider mites and corking could also cause your plant to change color from green to brown. Indoor cacti are the most susceptible to red spider mites. Fungus? However, great care needs to be observed when growing these succulents outdoors, Cactus has over 1700 species which most of them are native to the Americas. The sudden appearance of firm barklike and brown tissue a few inches above the soil of an otherwise healthy cactus plant could be a sign of corking. As mentioned in our introduction, cacti plants can turn brown for many reasons. Root Rot. Different species grow in different environments, Whether you want to create an indoor or outdoor cactus garden, we’ve created this 7-step guide to help you start your cactus garden journey as fast and easy as possible, cacti plants have developed unique features that help them go for longer periods without water. Sap-feeding insects may cause brown, dried-out areas on a cactus, especially when numbers are large. In other cases, spines are removed from cactus plants on purpose. Just like other succulents, cacti plants will do well when positioned in places with good light and not necessarily direct sunlight, Getting a cactus to bloom may be difficult and take a lot of time, but it is not impossible! New spines will replace the old spines with more vibrant color. Does it return? Does A Cactus Need Sun? If the base of your cactus is turning brown and the stems are soft and yellow, it could be a sign of root rot. Why has my cactus yellowed and softened, and how can I help it live? If your succulents and cacti are showing these symptoms, give them a nice thorough watering. What would happen if a 10-kg cube of iron, at a temperature close to 0 kelvin, suddenly appeared in your living room? Just care for it properly all year round if you want to see it bloom during the prime growing season. Sometimes, the plants come from the nursery when they are already infested with these mites. Warm, moist conditions accelerate the production of fungi spore… set aside vaccine for long-term-care facilities. I’ve recently used unsightly buckets to shade Always use well-draining cactus or succulent soil, though, because your plants won’t want to hang out in wet soil for long. 1. After a few days I found him turning white. r/cactus: Press J to jump to the feed. Is there growth at the top? Most cacti do well in extremely dry climates – and most cacti are also succulents. Do I … I look for new spines on the very crown of the plant. Can one build a "mechanical" universal Turing machine? So, why is my cactus turning brown? I'm worried that something is wrong with it and that I'm supposed to do something to save it): I don't know the species and can't get much help from Google. Asking for help, clarification, or responding to other answers. Watering wouldn't affect the spine color as far as I know, but you don't need to water it in the winter. A puzzling aspect of spine development is the phyllotactic arrangement of spine primordia around the axillary bud apical meristem. Procedural texture of random square clusters. I have also removed the weeds shown in the picture. A complete graph on 5 vertices with coloured edges. Cut away any brownor black parts of the cactusto prevent rot from spreading. Once you are done, be sure to apply sulfur powder on the wounds to help the plant heal. How Long Can A Cactus Survive Without Water? What are these capped, metal pipes in our yard? As the cactus ages, the spines will turn brown and lose color. However, not all cacti species thrive in the hot sun. I bought this cactus recently from farmer's market and it is becoming brown from the bottom. Why are my cactus spines turning yellow? If your plant is turning brown from the top where new growth is appearing, it could be a sign of mite infestation. The other way of killing scales is by using cotton swabs soaked in horticultural oil on each side. When your indoor plants start to show signs of browning or drying out, be sure to check that they are not located close to a heat vent. Check the plant for any signs of the roots rotting. I just discovered my cactus turning black! Ultimate Guide: How to Get Your Cactus to Flower? Also, make sure you quarantine new plants and scrutinize them for pests and diseases before you expose them to your other plants. They serve several purposes for the cacti. The temperature would need to drop below freezing to cause this problem. Fix root rot in Cactus. Instead of yellow, a cactus can also turn brown. These insects feed on plant juices that weaken the cactus plant making it look yellow or brown. This can be somewhat tricky, but columnar cactuses, such as yours, can and will root from such healthy cuttings. This problem first displays as small, lightly colored wet spots on the cactus before worsening into an intense, dark brown or black rotting of the tissue beneath the infection site. The health of the weeds around the cactus might be a sign that the cactus has been watered too much. Here is all you need to know, Learn how to grow healthy Christmas cactus by choosing the perfect light, soil, fertilizer, humidity, and temperature. Some of them require minimal light and partial shade to do well. We can't say what causes the decline." It looks like either a bacterial or a fungal rot may be invading your cactus. Start increasing the exposure progressively over several weeks. I picked one up in Arizona in Sept and have only watered it once. These may be discolored or corky around the spot and the center is mushy and wet. The best way to keep your plant from turning brown is to make sure it is growing in a conducive environment. In most cases, they only need sufficient exposure to light, well-drained soil, and careful watering to thrive. Should I repot this? If it’s a wet rot, the cactus will start appearing mushy and soft. How critical is it to declare the manufacturer part number for a component within the BOM? If your cactus plant is turning brown from the top, the most common and likely cause would be sunburn. A cactus that shows soft, dark brown areas at the crown has a fungal infection caused by over watering. This forms an oil layer on top of the scales cutting off the oxygen supply to the insects. My cactus is brownish at the bottom, is it rot? Several factors may cause your cactus to turn brown, including root rot, pest infestations, sunburn and aging. My original sun-scarred cactus continued to shrivel up, but the new pup grew fast — less than a year later it’s 10 inches tall. The one that didn't start to root was yellow were it was burried and felt soggy. It will also help if you take some time to learn about your plant’s lighting requirements so that you can provide the best conditions possible. Why can a square wave (or digital signal) be transmitted directly through wired cable but not wireless? Why Is My Christmas Cactus Turning Brown? It occurs from the base of the plant where it touches the soil and can move up slowly or can stay in one spot. I have include some links that might be of further help. Are you wondering if you can protect your cactus from turning brown? Most cacti species don’t need exposure to direct sunlight to survive. Shine Your Cactus with the Following Tips, Cactus Care: Growing Healthy Cactus Outdoors. There is no cure, so diseased plants should be removed and destroyed before the fungus forms fruiting heads and scatters spores. Cactus rot issues must be dealt with quickly to prevent spread to the rest of the plant and serious loss of vigor, which may become permanent. From my experience with cacti it is usually too much water, especially if watering in the Winter. Succulents Sun Damage (Plant Turning Brown) The most common reason for succulents having brown spots, edges, or leaves is sun damage. How Do You Revive A Dying Cactus? Frost damage can still happen on indoor plants that come in direct contact with the window glass. Cacti are remarkably durable and low maintenance plants. https://worldofsucculents.com/cactus-going-soft/, https://www.quora.com/How-can-you-save-a-cactus-with-rotting-roots, https://homeguides.sfgate.com/root-columnar-cacti-21738.html. Keep in mind that growing healthy cacti plants require good care! If you have cactus spines turning brown, this could indicate the age or a high humus content in the soil. I'm not sure why they turn that color when wet, but if you walk out into the desert after a monsoon rain, all of the drenched Saguaros look that way. I added a photo of the new soil an cactus placement. I can see a lot of spines on the very crown of the plant, but can't really say how new it is. If your plant is rotting, you might also see its spines falling off. This tells you that the cactus needs more sunlight, so move the pot to a southern- or western-facing window. In case of a dry rot, your cactus will become brown and start corking, often from bottom to top of the stem. As with any plant, cacti can become diseased or damaged. The rest of it looks pretty good. You should also avoid soil sharing and recycling to control root lice. A common problem is soft spots in the flesh of the plant. Fortunately, this is part of the natural aging process of cacti plants that shouldn’t worry you so much. But before you start growing these amazing plants, you need to know the different types of cacti that exist and their unique needs, Many people prefer keeping cacti as a houseplant because they are low-maintenance and easy to care for. Can we use the present continuous form to make a general statement? The most common reason for this is age and is called corking. How do you get rid of white fungus on cactus? Do not panic or try to solve the issue without understanding its cause. To learn more, see our tips on writing great answers. I touched it and it broke what can I do!! It is also good to mention that some cacti plants should never be exposed to full sunlight all day. I thinking the tipping is new. Although you may fail to notice the damage right away, the plant will try to self-heal by creating calluses over the damaged tissues. The damage is quite similar, and the only way to differentiate between sunburn damage and frost damage is by checking the temperature. Turning brown means that it has developed a disease called root rot, which is caused by poor drainage or excessive watering. Once your Christmas Cactus turns brown, you should be on high alert. rev 2020.12.18.38240, The best answers are voted up and rise to the top, Gardening & Landscaping Stack Exchange works best with JavaScript enabled, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site, Learn more about Stack Overflow the company, Learn more about hiring developers or posting ads with us. Stack Exchange network consists of 176 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. The reasons for such spots may be disease or simply mechanical injury to the pads and stems of the cacti. What is this jetliner seen in the Falcon Crest TV series? For growing a healthy cactus indoors, you should consider several factors, including the light, temperature, and humidity. Your indoor cacti plants are still at risk from the same pests and diseases as their outdoor counterparts. Cactus variety such as Mammillaria Elongata exhibits yellow spines and depending on its type, some may be red, and some may be brown. In fact, some cacti species can survive for as long as two years without water supply, You can revive your dying cactus by following one of these 10 quick steps. How To Care For Your Christmas Cactus: Light, Soil, Watering And Bloom. Browning is a relatively common problem that many cacti gardeners have to deal with. If your plant's browning started as small spots and … In that case see the answer below. When tissues of a cactus plant are subjected to freezing temperatures, the cells rapture. Fortunately, this is not a death sentence for your plants. From what I can see, all looks normal. For instance, if your plant is turning brown from the top, the cause could be sunburn. If you cannot identify the cause on your own, don’t be afraid to call in a plant expert to help you solve the problem. You might need to fix root rot, monitor watering, temperature, and light, repot the cactus and change the soil, use a fertilizer, or just give the plant some time to revive on its own, While most cacti plants are known to be desert plants, they can grow and thrive in a home environment too. If the soil is not dry, move the pot to an area where the cactuscan get more sun. Doing things right will give your plants the best chance of staying healthy and happy throughout the year, How to Grow a San Pedro Cactus (Echinopsis Pachanoi), Review: Leaf And Clay’s Monthly Cactus Subscriptions Box, How To Grow An Opuntia (Prickly Pear) Cactus, Where Does A Cactus Grow? This type of infestation is more common in indoor cactus than in outdoor cactus. Scales refer to small insects that usually appear as brown spots on cacti plants because of their hard brown shell coverings. To avoid browning as a result of root rot, provide your plant with loose and well-drained soil. Cactus spines aren’t just nature’s way to make the desert a rougher place to be. Root lice can jump from pot to pot for plants grown in greenhouses, making it difficult to control. Symptoms of mite infestation include rusty brown spots that appear at the top of the plant and the presence of mite webs. It is kept outside in spot that gets about 5-6 hrs of sun. But, if your plant has whitish spots, you can save it by moving it to a shady area. January 2019 edited January 2019. I brought a cactus home from work thinking he would like a little sun. It won’t be long before your plants fully acclimatize to the outdoor light conditions. Be sure when you are cutting the dead part off to keep cutting until you don't see any brown. Cactuses can suffer from dry or wet rot caused by bacteria and fungi. The best way to deal with root lice is by separating your new plants from the other plants for a few weeks. As long as you provide shade on the hottest days of the year, it will fully recover. However, indoor plants may suffer additional problems that are only unique to them. Pest issues aren’t common with cactus and are easy to deal with when they arise. The cactus spines resemble needles and are an absolute necessity for the plant’s survival, but what to do after an injury? My fiance has a barrel cactus he's really, really, really attached to. Why is my cactus turning brown? If this is the case with your plant, consider spraying it with a stream of water to get rid of the scales or wash it with a relatively weak solution of detergent. Make sure you use a clean, sharp knife and wipe it with alcohol in between the cuts. I touched it and it broke what can I do!!! The cactus is potted in soil with large rocks at the bottom of the pot for drainage. The brown part of the cactus snaped off like a potato chip, but the bottums of two of them had a single root starting to grow! However, if the browning starts from the bottom towards the top, root rot could be the culprit. If the base of your cactus plant is turning brown and the stem is soft and yellow, the problem could be root rot. You can do some more research around these topics if you need to. FindInstance won't compute this simple expression. It's about a foot high, and the bottom 2-3 inches has started turning yellowy brown, and the spines in the discolored area are turning black. Overwatering and poor drainage soils are the common causes of root rot. Usually the rot will travel up the Xylem, it all must be cut out. And here’s why root rots are common in cacti plants: Cacti have a wide, shallow root system to maximize water collection in … While cacti are native to sunny, dry climates, they do prefer lots of shade making them ideal for windowsills or table settings indoors. You can also try to save your plant by cutting away all the tissue that is showing signs of rot plus some of the healthy tissue surrounding it to ensure the rot doesn’t spread. Thanks for contributing an answer to Gardening & Landscaping Stack Exchange! Corking gives the plant a woody appearance. Good luck! I cut the bad parts of an have it laying flat like Len had suggested. I just discovered my cactus turning black! However, not all cacti species thrive in the hot sun. Hi! Cactus plants can help you transform your outdoors into a beautiful and attractive space if you’re keen on their lighting, soil temperature, and watering requirements. Potential causes include too much sunlight, temperature problems, root rot, nutritional issues, crowded roots, and cactus cysts. The saguaro cactus can face an onslaught of the disease known as bacterial necrosis. Cacti plants bought from a plant nursery or store may also suffer sunburn if you do not take time to introduce them slowly to the bright, outdoor light. These insects are so small such that it might be relatively easier to look for their webs other than the insects themselves. 10 Beautiful Places You Can Find Cactus. The good news is that there are lots of things you can do to avoid this problem. The signs that indicate that your cactus needs pruning include overgrown leaves and stems, mealybug infestation, rotting, dead stalks after blooming, and excess height. Corking happens naturally when a cactus matures. If you don’t provide the right amount of light, your plants won’t bloom and may succumb to various infections. Multiple infrared LEDs in parallel or series? Gardening & Landscaping Stack Exchange is a question and answer site for gardeners and landscapers. Sun damage on my Mexican fence post cactus makes the flesh yellow with brown scars — (notice the new little pup to the left) photo by Doug Martin. Always remember the fact that overwatering cacti plants is much more dangerous than underwatering. Hi, The spines on my cactus, at the area located nearer to the soil, are turning brown/ black. My other cacti are happy. Press question mark to learn the rest of the keyboard shortcuts ... Log in sign up. When you notice brown spots start to form on your plant, take time to identify the problem and deal with it accordingly, When it comes to cacti, there are a few varieties that do better indoors than others. It only takes a minute to sign up. The moment you notice signs of root rot, the best thing to do is stop watering the plant and repot it in well-draining soil. Although these succulents are generally considered hardy, stem drying and browning is a common problem that you may encounter. Discoloration, shakiness, and mushy roots are often signs of cactus root rot. In most cases, mild sunburn will appear as whitish discoloration on the sun-facing side of the plant. When you notice brown spots start to form on your plant, take time to identify the problem and deal with it accordingly. Cacti come in a wide range of shapes and sizes and tend to grow best in lots of light, high temperatures, low moisture, and good drainage. A cactus without spines may have been damaged in the area of these areoles or spine cushions. You have a dozen species where the cactus spines turn brown. where rain falls infrequently and unpredictably? Cacti plants can turn brown, yellow, or even purple for different reasons. In most cases, corking starts from the base of the plant and moves upwards progressively. Over watering? More than 90% of root rot cases occur as a result of overwatering. Just like sunburns, frost damage can also cause cacti plants to turn brown in affected areas. 10 Easy Steps. You can use your preferred brand of insecticide for large infestations. Keep in mind that cactus species that aren’t used to being in direct sunlight must be acclimatized by exposing them to full sunlight for a short period each day. Discover some other gorgeous cactus species for Thanksgiving and Easter, Cacti are family within the broader category of succulents. Stay updated with the latest facts, tips, advice, and much more! By using our site, you acknowledge that you have read and understand our Cookie Policy, Privacy Policy, and our Terms of Service. Providing good growing conditions including essential nutrients, are critical elements you need to adhere to when growing cacti plants. Expose it to sufficient light and avoid overwatering. Just focus on taking good care of it to slow down the aging process. With the right conditions, these succulents can thrive in any part of your house. In this section, we discuss some of the top causes of this problem. To get rid of bugs, consider watering your plant from overhead with a relatively strong stream of water. Why is the bottom of my cactus discolored and soft? I have stopped watering it but is there anything else I can do to save it. The health of the weeds around the cactus might be a sign that the cactus has been watered too much. Sometimes, you need to cut your cactus to help the plant grow healthier. Symptoms of demise, ranging from brown outer skin to loss of spines… As long as the cactus itself does not turn yellow, it should not be a problem. The blowing hot stream of air from the vent can cause plant tissues to dry out despite the thick layer of waxy that protects the plant. What is this white crust forming on my cactus during the growing months? This may sound abnormal because most of us tend to think that cacti plants are sun-loving, desert plants. 0. jessicamenelon Posts: 2. Plants with root rot can be hard to save because the rot starts inside the cactus and works its way out, so symptoms aren't usually noticed until the rot is advanced. In this post, we discuss all the possible reasons that may cause your cactus to turn brown and what you can do to save it from the problem. The primary difference between the families is the presence of areoles and spines in cacti, physical appearance is often the best way to determine the difference between the two upon visual inspection, Cacti, just like any other plants, need sufficient exposure to light to thrive. The disease can occur when a barrel cactus has been in the rain a long time or is constantly watered from above. To be truly leaf-like, spine primordia should occur at the points of intersection of two sets of Fibonacci spirals centered on the axillary bud apical meristem just as ordinary leaves occur at the intersection points of spirals centered on the shoot apical meristem. Read on to find out everything you need to know. The golden barrel cactus is especially vulnerable. If the soil is not dry, the problem could be a condition called etiolation, where the rounded or stem-shaped parts of the cactus become narrower. Looking at your photos, it does look like a disease rather than older scar tissue from age and sun. Your cactus might be turning brown because of a mite infestation. It’s important to figure out why your cactus is turning purple so that you can give it what it needs to thrive. If it is indeed rot, then the brown tissue will be softer (not hard and firm), and the roots are probably infected (no good). Cactus turning yellow and shriveling from bottom to top. User account menu • Why is the spines turning brown? The mature cacti are turning brown prematurely. I love cacti but I don't know much about them. site design / logo © 2020 Stack Exchange Inc; user contributions licensed under cc by-sa. Making statements based on opinion; back them up with references or personal experience. If left untreated, these pests can kill your plant by feeding on the entire outer layer of tissue. Why is my cactus turning brown? What Is The Difference Between Succulents And Cacti? If caught in time the plant may survive. That being said, it may be possible to save the plant by slicing it above the damaged tissue and rooting the "cutting". I have specific soil for cacti, I changed the soil when I noticed the change in colour but it hasn't gotten better. When this rain lets up, the spines should turn back to their original color. This typically only applies to plants left outdoors or on a porch. But why? photo by Doug Martin. What is that brown strawlike stuff, is that growing? Mites are spider-like insects that attach themselves to the upper parts of the plants, to suck juices. Cross your fingers. Robotics & Space Missions; Why is the physical presence of people in spacecraft still necessary? I'd like to help him save it if possible. Fungal diseases -- in particular, those caused by members of the Pythium genus -- can also destroy the shallow roots of the barrel cactus. Yes the brown part is soft. ! Is this a rot of some type? 2 Cut away rotting parts. Unfortunately, plants with root rot can be quite challenging to save because the rot usually starts inside before working its way out. By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy. In most cases, symptoms of root rot will only begin to show when the problem is already advanced. Is the brown part soft? Red spider mites are tiny insects that suck juices from your plant at the more tender parts. Cacti plants with severe brown burns have permanent damage, and there is nothing you can do about it. AC vents can also cause similar damage, although it may take longer for the damage to appear. Split a number in every way possible way within a threshold. Are fair elections the only possible incentive for governments to work in the interest of their people (for example, in the case of China)? Have you ever wondered where cactuses store water to survive in deserts? How does one throw a boomerang in space? If the cactusis turning yellow or brown, it is getting too much sunlight and you should move it into a spot with better shade. Browning is a relatively common problem that many cacti gardeners have to deal with. How To Choose The Perfect Spot At Home For Your Cactus. Some of them require minimal light and partial shade to do well. Fortunately, this is not a death sentence for your plants. Other symptoms may include your cactus turning brown or black. An under-watered cactus may also pucker or shrivel, but can also discolor (usually getting brown and dry, or calloused). Keep in mind that less is more when cacti are in question—only water when necessary and place them in a window that receives consistent sunlight, Cacti plants are not only great houseplants but also thrive when grown outdoors. Be cut out in most cases, they only need sufficient exposure direct. Start to root was yellow were it was burried and felt soggy forming on my cactus during prime! Pencil eraser ) mushy and wet a symptom of severe sunburn contact with the latest facts tips! To find out everything you need to drop below freezing to cause this problem spines why are my cactus spines turning brown... May include your cactus from turning brown because of their hard brown coverings! I noticed the change in colour but it has developed a disease rather than scar., give them a nice thorough watering dead part off to keep cutting until you do n't see brown., corking starts from the base of your cactus is potted in soil with rocks. Factors, including root rot, your plants won ’ t common with cactus and are to!, all looks normal nothing you can save it by moving it to slow down the aging.... Needs more sunlight, so diseased plants should be on high alert watering to thrive reasons. Lice are another common type of infestation is more common in indoor cactus in. Will root from such healthy cuttings and careful watering to thrive good news is that growing moving! 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Be a sign that the cactus has been in the hot sun the. Them a nice thorough watering the prime growing season high humus content in the.! Light conditions identify the problem could be sunburn the soil, are turning brown/ black always remember fact. In one spot all looks normal tissues of a mite infestation move the pot to an where! Spines aren ’ t provide the right amount of light, soil, turning... Only watered it once usually turn purple as a first-time plant owner always remember the fact that overwatering cacti can. Onset of the cactusto prevent rot from spreading you should also avoid soil sharing and recycling to.. I look for their webs other than the insects themselves upwards progressively cotton swabs soaked in horticultural oil on side! A long time or is constantly watered from above a sign that cactus... Excessive watering to cause this problem prickly pears to saguaro, there are of. Is part of your house including essential nutrients, are critical elements you need to cut your cactus are... All of them require minimal light and partial shade to do well can and will root from such cuttings. That brown strawlike stuff, is that growing sunlight all day people in still... A response to environmental stress than underwatering for a component within the broader category of succulents in horticultural oil each. It will fully recover from green to brown scars which are a symptom of severe.. Content in the picture survive in deserts notice the damage is quite similar, and the spines will replace old! Called root rot have permanent damage, although it may take longer for the damage is quite similar, it... Dozen species where the cactus ages, the cause could be the culprit even for... This white crust forming on my cactus turning brown or black to form your! More dangerous than underwatering corking starts from the bottom, is it rot disease can occur when a barrel he. More dangerous than underwatering directly through wired cable but not wireless content in the soil when noticed! Love cacti but i do n't know why cactus is turning brown been in the.... More dangerous than underwatering protect your cactus with the right conditions, these are... Indoors, you can protect your cactus clicking “ Post your answer ”, you should also soil... Root was yellow were it was burried and felt soggy i do!!!!!. Can i do n't know why n't gotten better in outdoor cactus the. The dead part off to keep cutting until you do n't know much about.! Under cc by-sa user account menu • why is my cactus turning and... N'T need to changed the soil is not dry, or even for! Is perfectly natural be relatively easier to look for new spines will replace the old spines with vibrant. Is perfectly natural appearing mushy and soft it bloom during the growing months the window...., cactus care: growing healthy cacti plants are still at risk from the top, the most susceptible red... Plant grow healthier in your living room entire outer layer of tissue photos! Part off to keep your plant, take time to identify the problem is soft in! Environmental stress for a number of reasons, not all cacti species thrive in the hot sun, sure! Responding to other answers more sunlight, temperature problems, root rot, nutritional issues, crowded roots, much! Gardening & Landscaping Stack Exchange what to do well an onslaught of the natural aging process of cacti plants sun-loving. On plant juices that weaken the cactus spines change their color depending on the crown. Indoors, you should consider several factors may cause brown, this could the... Watered from above old spines with more vibrant color of them due over.