Although photosynthesis requires sunshine, certain plants might receive too much of it. While some succulents can be grown in full sun (defined as 6+ hours of direct sunshine each day), not all of them can, and some may even suffer from too much sunlight. Sunburned leaves will appear brown or black and could start to shrink or callus. Moving your plant to a location with less exposure or intense light is the best technique to treat sunburn on that plant. While untouched areas of the plant will continue to be in good health, sunburned leaves will never fully recover.
By observing other leaf symptoms, you can tell sunburn from rot. A plant that has recently been exposed to the light will still have big, thick leaves that have started to turn black or brown but may still be glossy. Older sunburns will be dry, shriveled, or even fully desiccated, and they will be black or brown in color. The appearance of rotted and overly wet leaves will be mushy and wrinkled.
If a plant at the store or one you own has sunburn, it probably wasn’t properly cared for and was exposed to too much light at some point rather than being sick and dying rapidly. Remember that burnt segments frequently shrink up, so even though the plant may not seem attractive, it may still be healthy and continue to grow for many years. The easiest approach to avoid purchasing plants with sunburns is to only purchase them from local, independent nurseries and vendors rather than big-box retailers, where this kind of damage is more likely to be visible.
These advice should aid you in identifying and treating any problems that may exist with your succulents. For you to always bring home a plant that can be your companion for years to come, we’ll be showing you things to avoid when shopping for plants and succulents in our upcoming post!
How can you tell whether the sun is getting too much of your succulents?
Succulents quickly begin to display signs of stress from excessive heat or intense sunlight.
Succulents frequently “blush” or change color when they are receiving enough sunlight. What a lovely transformation to witness!
However, if they begin to receive excessive sunlight, the leaves will actually burn. The succulent leaves may start to show white or pale areas. This harm cannot be undone.
As an alternative, make an effort to relocate your plant to a location with less intense sunlight and wait for new leaves to emerge. It is optional to remove damaged leaves if there are just one or two of them.
The leaves may truly turn dry and black in rare circumstances. The margins of the leaves will first turn black, and it will be dry and crispy (in contrast to blackening from rot which starts in the middle of the plant and is wet and mushy).
Once more, this injury won’t go away until the leaf totally withers and new leaves emerge.
A succulent in the shade may start to turn a golden or yellow tint if it is still quite hot outside. Instead of turning entirely white, as would happen with sunburn, the succulent instead appears warmer or more yellow than usual.
If the succulent is transferred to a colder setting, this usually disappears or the succulent returns to its normal hue.
I can keep succulents alive very well sometimes, but not always.
I recently relocated to Arizona from Utah. Growing succulents can be challenging for a variety of reasons, including relocation. You must pay close attention to how much heat and sunlight each area of your garden receives.
Although it’s a little humiliating, I’m going to show you what my garden looked like when it received excessive sunlight and heat in the video below.
Hopefully, this example will show you what to watch out for so that your garden doesn’t turn out like mine did.
Can a succulent heal from sun damage?
You are unable to undo the harm the light has done to your succulents, which is unfortunate. Any discolored patches you notice on your plant are permanent since plants cannot heal from sunburn the way humans can.
There are a few solutions for handling sunburned leaves, but there is no cure for sunburn. The initial step is to remove the plant’s damaged areas. You might be able to grow new succulents from the damaged leaves since many succulents can be propagated from leaf cuttings.
Allowing the plant to grow is another choice. The old burned leaves on your succulent will ultimately shrivel up and fall off as it grows and develops new leaves. If you don’t have to get rid of the unattractive leaves right away, you can just let nature take its course. The plant will eventually produce enough new growth for the sunburned areas to eventually fall off and be completely covered.
Can cacti be placed in direct sunlight?
Depending on the type, succulents need six hours of sunlight each day because they are light-loving plants. You might need to gradually expose newly planted succulents to full sun exposure or give shade with a translucent screen because they can burn in direct sunshine.
THE IMPACT OF TEMPERATURES ON SUCCULENTS
Succulents typically prefer climates with temperatures between 60 and 80 °F. Some people can withstand temperatures as high as 90°F or as low as 40°F. These severe temperatures are occasionally used by gardeners to “stress” their succulents into changing color. Many succulents, especially soft succulents, can often benefit from high temperatures between 80°F and 90°F to keep their beautiful hues. You’ll notice that many hues will start to get more intense when the temps fall (but remain over 40F). The chilly (but not freezing) temperatures over a prolonged period of time intensify these colors. Be mindful that your succulents can suffer from temperatures that are too high or too low. Never recommend a temperature of 40°F or greater than 90°F.
Your succulents may suffer from sunburn in the summer due to the combination of high temperatures and direct sunlight, which can harm both the leaves and the root systems. You should move your succulents to a shaded place during the warmest part of the day or cover them with shade cloth. People who reside in regions with extremely hot climates might think about planting their succulents directly into the ground as opposed to in containers since soil temperatures remain largely stable regardless of fluctuations in the weather. If you want to grow succulents in containers, pick materials like concrete, terracotta, ceramic, or wood that are excellent at protecting plants from rapid temperature changes. Avoid using metal and glass containers.
Keep the temperature above freezing to prevent frost damage to your succulents over the winter. You can do this by covering them with a cloth or bringing them inside. While some tropical species like Euphorbia and Lithops demand temperatures of at least 50-60F, some cold-hardy species, like Sempervivum, can endure frost and love cool temps from 30 to 40F. Check out the Hardiness information on each of our plant product pages, where we provide thorough information on the USDA Hardiness Zone for each plant, to discover precisely whether a certain succulent variety is suitable for the climate in your location.
How do succulents look burned by the sun?
If the plants are exposed to too much direct sunlight, succulents can seem sunburned.
When a succulent is exposed to light, the burns often appear as brown, yellow, or red blotches on the leaves and stems.
On either side of this leaf’s upper edge, where it was exposed to sunlight for an extended period of time, you can discern brown scorched regions.
The stem end of succulent, fleshy leaves that have spent the entire day outside without shade or moisture protection may also develop this coloring.
This causes a burn mark to form unevenly, and because it occurs on both sides of the upper edge of the leaf, towards the end of the stem, and around the margins, it frequently appears larger than it actually is.
Succulents that are not in direct sunlight will get yellow sunburns.
On plants, these burns appear as mottling and discoloration. It can happen to plants that are close to fences or other plants and is brought on by the leaves spending a prolonged amount of time in the sun.
Where it was exposed to the sun for a long time, the stem end of a succulent leaf may also have a red sunburn.
Common Signs of Sunburned Succulents
Indicators of a burnt succulent include:
- Brown marks
- leaf drop or wilting in the affected area
- wilted leaves
- leaves with a hint of yellow
- yellow sunburns
- Near the leaf’s stem end, there are red sunburns.
- Roots in potting soil that are dry and brittle
- soil that has been damaged or dried out near a sun-exposed region.
It’s important to recognize this soon so you can take care of your succulent plant before it worsens and dies.
How may too much sun damage a plant?
Recovery
- Plants can be moved into areas with less light or covered with shade fabric.
- Water plants more frequently and during the coldest hours of the day.
- Burned leaves will ultimately fall off and be replaced by new growth, but dark burns won’t go away right away.
What does a succulent look like when it is overwatered?
How can you tell if your succulent is getting too much water? You can usually determine if a succulent is being overwatered or underwatered by looking for telltale indications. A plant that has received too much water will have soft, mushy leaves.
The leaves would either turn translucent in color or appear lighter than they would on a healthy plant. A succulent that had received too much water would frequently lose leaves readily, even when only lightly handled. Usually, the lowest leaves are the ones to suffer first.
The plant will look to be unhealthy overall. When this occurs, the plant is either being overwatered, sitting in the incorrect soil that does not dry out quickly enough, or both.
Your plants are being overwatered if you have been giving them regular waterings or if you have been following a watering schedule regardless of how the plant appears.
On the other hand, a succulent that has been submerged will have withered, wrinkled, and deflated-looking leaves. The leaves will appear thin and flat. The entire plant will appear withered and dry.
The leaves of a good succulent plant should be thick and solid, not mushy or desiccated.
To learn more about this subject, visit my post titled “How To Tell If Your Succulent is Over or Under Watered,” in which I go into great length about how you may determine whether your succulent plant is being over or under watered.
This String of Pearls ‘Senecio Rowleyanus’ plant leaf is one that has been overwatered. If a succulent’s water storage capacity has been exceeded, it may physically burst from overwatering.
How do you tell whether a succulent needs to be watered?
Succulents are better off dry than wet, but that doesn’t mean you can ignore the need to water them. In fact, the plant needs water to survive, and much like people, it will exhibit dehydration symptoms. Your succulent clearly needs extra water if its leaves are wrinkled and shriveled.
The cells attempt to bring in more water to make up for the water that has been lost as they release their stored moisture to the rest of the plant. The cells shrink as they run out of water and the plant is forced to rely on its limited reserves, which causes the once-firm and full leaves to collapse and shrivel.
How come my succulents are dying?
Overwatering and poorly draining soils are the main causes of succulent deaths. Succulents need the soil to dry out between waterings because they are drought-tolerant plants. Succulents get root rot in wet soil, which turns their leaves brown, black, or yellow and gives them a withering appearance.
While overwatering is the most frequent cause of dying succulents, there are several other potential causes as well:
Succulent plants typically die back when they are kept in environments that are drastically different from their native habitat.
Replicating some of the minimal rainfall, full or partial sun exposure, and stony, well-draining soil conditions will help revive dying succulents.
When a plant receives too much sunlight, what does it resemble?
Although photosynthesis is something we are all familiar with, most people are unaware of how plants use the energy they produce. For instance, during photosynthesis, plants use energy from the sun or light to produce sugar and other organic components like lipids and proteins. Proteins and sugar, or glucose, are then used by plants to make their own food and building blocks for growth. Waxy coatings for insulation, energy storage, or heat generation are some examples of these.
Plants need the energy from light to make the nutrients they require, as is well known. However, if they take in more light than they can utilize, the extra can be harmful. They then turn the extra energy into heat and release it through transpiration to protect themselves.
In certain circumstances, they may reject about 70% of the light energy that they take in. Therefore, even though plants have the ability to decrease the amount of light absorbed through their leaves, this quick reduction in light absorption only has a modest impact on the problem of coping with too much light.
The Cabot Career Development Assistant Professor of Chemistry at MIT is Gabriela S. Schlau-Cohen. She has done a lot of research on how plants use light and deal with heat stress. According to her research, algae might produce up to 30% more material suitable for biofuel. “More crucially, crop yields may be increased globally—a necessary adjustment to avoid substantial gaps between agricultural production and food demand.” Schlau-Cohen continues, “We might be able to rewire that process to improve the entire output of biomass and crops if we could understand how absorbed energy is transformed to heat.” “To encourage plants to turn off the protection more frequently, we could manage that switch. Even if a few people died, the output of the remaining population would improve, thus they could still be protected to some extent.”
When plants receive too much light, they display a number of symptoms. The leaf burning is the most obvious symptom. This often results in the top leaves of the plant yellowing, but the veins remain green and the leaves have a yellow or brown, burnt appearance. Although this impact can be mistaken for a nitrogen deficiency, light-burned leaves won’t fall off or be simple to pull off, unlike those with a deficiency in nitrogen.
Simply shift the light source or the plant to provide more space and reduce the amount of time the lights are on if your plants are grown inside. Outdoor settings present greater challenges, but having some shade, especially in the middle of the day, is beneficial.