Cool, dry weather is what gives cacti their purple hue. The plant’s response to environmental stress is to turn purple. When under duress, some types of succulents, agave, and aloe also turn scarlet, burgundy, or purple.
How come my cactus is becoming purple?
Stress is sometimes indicated by cacti and succulents turning purple or brown. This may be brought on by extremely high temperatures, excessive sun exposure, inadequate watering, excessive repotting (which, as Kakteen said, may indicate discomfort or issues with the root structure), or a combination of these factors.
Even in their natural habitat, several species (such as Aloes, Haworthia, and Gasteria) exhibit this phenomenon; photographs of wild plants occasionally show them to be substantially different from those of cultivated plants.
Many of my cacti and succulents experience this, especially during the winter months when they are kept completely dry with at least a few hours of direct sunlight exposure. This is especially true of my aloes, ferocactus pilosus, gymnocalycium marsoneri (which is turning almost entirely purple-brown), chamaecereus, and cleistocactus winteri (which is turning yellow), among other species. Even in the middle of summer, the edges of my Echeveria rubromarginata’s leaves become purple.
I played around with an aloe last year and after leaving it in the sun all day without any water (as ondy did with his stenocereus), it turned entirely brown after two to three weeks. It turned emerald green in less than a month after I gave it shade and started giving it regular water. After that, I shifted once again, and my chameleonic behavior persisted.
Nothing goes wrong if you don’t push it over its breaking point. The plant simply needs something, and this is just a signal. They occasionally appear even better.
How can a purple cactus be fixed?
When the majority of the leaves on your cactus are visibly purple, there is cause for concern due to the color change.
Additionally, wilting, stunted growth, or wet foliage are warning indicators of a problem. To ascertain whether your plant is in any immediate danger, it’s critical to identify the reason for the color change.
When cacti are under duress, their colors shift. Betalain, a purple pigment found in cacti, is one that they create more of when stressed.
Too Much Sunlight
Cacti have adapted to thrive in direct sunshine, but the one you have at home may be struggling.
Cacti found in stores have often been produced in greenhouses with shade. They are therefore not accustomed to such intense sunshine.
Bright light is necessary for cacti, but indirect, diffused light is preferable. An abrupt exposure to harsh light can scorch a cactus’s skin, turning it purplish-red in hue.
Your cactus is probably sunburned if it is fresh or if you recently moved it to a sunnier location.
How to Treat Sun Scorched Cactus
Fortunately, treating a sunburn is not too difficult. Your cactus should be moved to a location that receives less direct sunlight.
Cacti still require a ton of sunlight, so don’t move it to your basement just yet!
Direct sunlight is light that shines directly on a plant, such as via a south-facing window.
The indirect sunlight from the other windows in your home will be more evenly distributed and kinder to the plant.
To avoid sun burning, move your plant to a window facing any other way.
Make a DIY sun filter if all of your windows are on the south side. To provide your cactus with some much-needed shade, simply place a paper towel over it.
Temperature Issues
Purple leaves may indicate stress brought on by high temperatures. When cacti’s roots get too hot, they sometimes turn reddish-purple.
Additionally, cacti can become purple under extreme cold. The plant can no longer contain fluids if it has frost damage because its cells burst.
How to Fix Temperature Stress
Since the ideal temperature is somewhere in the middle, it’s crucial to keep your plant away from environments with significant temperature fluctuations.
Keep your cactus away from drafty areas like open doors and windows to avoid it from getting too cold. Avoid areas with excessive heat and dryness as well, such as around fireplaces and heating vents.
Keep your cactus in a cold planter because its roots are particularly susceptible to overheating. Avoid using black plastic planters and get ones made of clay instead.
Root Rot
Purple leaves may also indicate root rot, which is brought on by over watering and inadequate drainage.
Your plant’s roots will dry out and become unable to absorb any more water or nutrients like magnesium if the soil is left wet for an extended period of time. Your cactus might consequently turn purple.
How to Fix Root Rot
With sterile scissors, begin cutting off the injured roots and leaves while removing as much of the moist dirt as you can.
Place the plant in a clean pot filled with new potting soil. Allow the top inch of soil to dry out between waterings and wait a few days before watering the cactus after transplanting it.
Overwatering is frequently the cause of root rot. I have a piece on how to keep your overwatered cactus alive. You will also learn the proper way to hydrate them.
Nutritional Issues
Your cactus may be turning purple because it lacks the nutrients it needs to survive, which is one potential explanation. Your plant may be suffering from a magnesium deficit if it is withering and turning purple.
Magnesium deficits are more likely to occur in Christmas cacti. Nevertheless, all varieties of cacti are vulnerable.
How to Treat Nutritional Issues
Fertilizer is the remedy for a magnesium deficit in your cactus. You can apply an Epsom salt treatment yourself or purchase a fertilizer that has been supplemented with magnesium.
In a spray bottle, combine the following items to create a magnesium treatment:
- Epsom salts, eight tablespoons
- A total of 2.5 gallons of water
- A couple of drops of dishwashing liquid
Spray the cactus’s leaves with water using a spray bottle, being sure to reach the undersides as well. Use the spray mixture consistently every two weeks until the color of your cactus returns to normal.
Crowded Roots
Another possible explanation for your cactus’ color change is congested roots. A plant’s roots may get excessively crowded, or “rootbound,” if they are planted in a container that is too tiny.
Plants that are root-bound are unable to adequately absorb soil nutrients and water. The leaves may turn purple as a stress response in response to nutrient insufficiency.
How to Fix Overcrowded Roots
Your cactus’s root system may enlarge over time and may eventually become too large to fit inside the pot it was originally in.
It’s time to repot your cactus to a larger container if you see that some of the roots are attempting to escape through the drainage hole. Normally, every 3 to 4 years, think about repotting your cactus.
Your cactus needs to be relocated to a larger location if its roots have grown crowded. Cacti should often be repotted once the roots are visible through the drainage holes at the bottom of the pot.
This normally takes two to three years for cactus kinds with a quicker growth rate. Repotting slower-growing cactus should only be done every three to four years.
Researching the perfect settings for your cactus is vital because not all cactus species have the same requirements.
For instance, some cacti, including Christmas cacti, thrive when their roots are packed.
So, until it has lived in the same pot for at least a few years, a Christmas cactus shouldn’t be repotted.
The steps to repot your cactus are as follows:
- Make sure you are using thick gloves to protect your skin from the plant’s sharp spines before repotting your cactus.
- Look for pests and disease symptoms in the plant and the soil.
- Choose a new container that is one size bigger than the old one.
- To aid with drainage, add gravel to the bottom of the pot and sprinkle a thin coating of it on the soil’s surface.
How does a cactus look when it is about to die?
A dying cactus may be unsteady in its potting soil and seem to be about to fall off.
In a severe case, it will undoubtedly fall off if you move it. showing a lack of roots Or the current ones might not be strong enough to adequately support the plant. Providing you potted the plant properly, that is.
Why did the purple turn on my Christmas cactus?
Your Christmas cactus leaves frequently have a purplish hue, which is typical. However, if it is conspicuously present throughout the leaves, it can indicate a problem with your plant. The following are the most typical causes of Christmas cacti’s leaves turning red or purple:
issues with nutrition
Your Christmas cactus may be deficient in essential nutrients if you don’t fertilize it frequently. From spring to mid-autumn, treat the plant every month with an all-purpose indoor plant fertilizer.
Additionally, since Christmas cacti require more magnesium than most plants, adding 1 teaspoon (5 mL) of Epsom salts to 1 gallon of water as a supplement to the plant’s diet usually works well. Throughout the spring and summer, apply the mixture once a month, but avoid using it the same week you apply conventional plant fertilizer.
dense roots
Your Christmas cactus could not be properly receiving nutrients if its roots are bound. This is one potential explanation for the Christmas cactus’ reddish-purple leaves. Don’t repot your plant until it has been in the same container for at least two or three years, but keep in mind that Christmas cactus flourishes with dense roots.
Repotting Christmas cactus is best done in the spring if you find that it is rootbound. Transfer the plant to a container that is filled with a potting mix that drains well, such as ordinary potting soil blended with perlite or sand. The pot has to be one size bigger.
Location
Christmas cactus needs bright light in the fall and winter, but excessive direct light in the summer may cause the leaves to become purple on the margins. It could be possible to avoid sunburn and fix the issue by moving the plant to a better place. Ensure that it is not near any open doors or drafty windows. In the same way, stay away from hot, dry locations like those near a fireplace or heating vent.
What is causing my succulents to turn purple?
There could be a few causes for your succulent plant to start turning purple. The reasons why your succulent may be turning purple or red, turning purple and dying, what it signifies when succulents turn purple, and what to do in this case are all listed in this page.
Purple or other color changes in succulents can occur naturally or as a result of stress. Stress can cause your succulents to turn purple or red, and the causes can include abrupt temperature changes, excessive heat or light, as well as a lack of food and water.
Anthocyanin and carotenoids, two pigments, are what give succulents their purple or red color. During periods of intense sunlight, this pigment primarily prevents succulents from overphotosynthesizing and burning.
To reveal their full potential colors, some succulent growers purposefully expose their plants to more sun. Blushing or red/purple colouring disappears after sunshine exposure is reduced once more.
What is causing my plant to go purple?
The most likely cause of a plant’s purple leaves rather than its usual green color is a phosphorus deficit, as you may have noticed. Phosphorus (P) is a mineral that all plants require to produce energy, carbohydrates, and nucleic acids.
Compared to older plants, young plants are more likely to show symptoms of phosphorus deficiency. Some plants may become deficient in phosphorus if the soil is chilly early in the growing season.
Too little phosphorus may cause the underside of marigold and tomato plant leaves to turn purple, while other plants will become stunted or will take on a dull, dark green hue.
How frequently do cacti need to be watered?
The most frequent reason for cacti failure is improper watering, whether it is done too much or too little. Cacti have evolved to store water for extended periods of time and can maintain moisture through droughts because they are endemic to arid regions and dry temperatures. They have a limited capacity, which is why over-watering can result in a variety of issues.
When it comes to regularity, watering your cacti will largely depend on the season but also on the variety. Checking the soil is the easiest technique to determine whether your cactus needs water: It’s time for a drink if the top inch is dry. That entails applying the “soak and dry procedure” on cactus.
What is the soak and dry method?
The soak and dry technique is thoroughly wetting the soil until part of it begins to flow out the drainage hole, then waiting until the mixture is nearly dry before wetting it once more. If done properly, this strategy will help them endure a period of under-watering should you need to travel or leave the house because it takes use of their natural tendency to store water (or if you just get busy and watering falls to the wayside, as happens to all of us now and again).
Watering during the growing season versus the inactive season
Like with many houseplants, the season affects how frequently you need water. It becomes more crucial that you get in the habit of examining the soil to determine whether your cacti are thirsty. A healthy cactus needs watering every one to two weeks during the growing season, according to general wisdom. The frequency changes to once every three to four weeks during the off-season.
Even then, it’s crucial to examine the soil. The same way that not all interior spaces and not all cacti are alike. The only way to be certain that your cactus require watering is to carefully examine the soil to determine how dry it is because there are so many different factors.