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.
Do succulents prefer intense sunlight?
On the east side of my home, where my succulent collection is located, it receives direct sunlight from dawn till around 1:00 in the afternoon. There is a lot of sunlight here!
I’ve discovered that in order to keep the roots cold and the foliage lush, I need to water my plants every other day when the temperature is above 90.
The succulent leaves still get heated despite this constant watering, and I’ve had some, but rather severely. It can be unpleasant when the bright light and hot temperatures combine.
Most succulents will tolerate full sun for the majority of the day if you progressively expose them to it (raising an hour or so every few days).
To shield them from the direct sun, I recently put some shade fabric. Even though it’s still well above 90 degrees outside, the space around the succulents is significantly cooler thanks to the shade cloth.
Additionally, without direct sunlight, the plants’ leaves don’t get as hot and are less prone to burn or exhibit signs of excessive heat.
Haworthias, for example, prefer bright indirect sunlight all day long. On the other hand, the majority of cacti can withstand full sun during the day without any shade. This is why it’s crucial to be aware of the varieties of succulents you own.
The phenomenon known as “blushing,” which occurs when some succulents are exposed to bright sunshine, causes the leaves to occasionally turn a deep red, as with this Aloe ‘Crosby’s Prolific’.
Simply placing your succulents in a location that receives bright shade for the majority of the day is an excellent alternative. They should ideally be in a spot that receives a few hours of early sun but is otherwise shaded for the majority of the day.
Direct sunlight during this time can be an issue because afternoon temperatures are typically higher. On the other hand, morning sun is cooler and less prone to result in sunburn.
For many succulents, extreme heat can be exceedingly difficult. Succulents are often thought of as desert plants, however not all of them thrive in a very hot desert environment.
For more advice on how to keep succulents looking fantastic during a heat wave, see the video below:
For succulents, how much sunlight is too much?
Since succulents come in a wide range of hues, forms, and sizes, their requirements and ideal environments will also vary. While some people thrive indoors, others favor the chilly temperature of the mountains. It’s crucial to understand the many types of succulents and their various needs before selecting how to best care for your succulents.
Succulents require various quantities of sunshine, depending on their color, species, and native environment. Succulents often benefit from 6 to 8 hours of sunlight per day. However, if succulents receive too much direct sunshine, they may develop brown blotches or even perish, especially when they are first planted.
Keep reading to learn everything you need to know about succulents and direct sunlight.
Can succulents withstand intense heat?
Don’t allow the hot, harsh sun hurt your succulents! Unlike frost (temperatures of 32 degrees Fahrenheit or lower), heat normally poses no threat to succulents. The majority of plants can tolerate temperatures higher than you’re comfortable with, as shown by greenhouse temperatures that rise into the triple digits on hot days, despite the fact that some don’t seem to thrive in temperatures above 80 or 90 degrees F. Succulents, though, can succumb to heat and sunlight. All smooth-leaved succulents, excluding desert cacti and agaves, require sun protection in the summer, especially when the temperature rises beyond 80 degrees.
If you live in an arid climate ~
- Identify the sun’s position relative to your property. In North America, plants growing on the north side of your house will receive the least solar exposure while those growing on the south will receive the most. My garden, which faces east, receives early sunlight and midday shade. West-facing gardens receive early shade and afternoon sun.
- When temperatures are at their highest in the middle of the day, “bright shade” (no direct sun but not deep shade) is great for non-desert succulents. For low-light succulents like haworthias, bright shade is needed. Visit our website’s Shade Succulents page to learn more. View my video about Shade Succulents.
Above: Although robust, the echeverias on the left in the brilliant shade have lost their color. The borders of those exposed to more sun are red, but they are smaller due to some stress.
- Keep track of where each new plant you purchase was situated in the nursery. Was it in the open or covered by a tarp? It will need to be “hardened off” (shaded, especially in the afternoon) until it acclimates, even if it is a “full sun” succulent like an agave. This kind of exposure is like tanning: Start with 30 minutes of sun, then gradually increase it by about an hour per day.
- Aloes and crassulas need at least a half-worth day’s of sun to turn red and orange, but not so much that the tips of the leaves shrivel or burn. (Read “How to Stress Succulents and Why You Should. “).
Above: Dryness and heat stress this jade (Crassula ovata). To maintain its life, the plant is gently draining its leaves. However, leaves will be plump and greener after irrigation or rain (which could take months).
- Cover exposed, horizontal stems of trailing succulents (aloes, senecios, othonna, and the like) with dry leaves or mulch to prevent burnt stems from impairing the ability of the plants to transfer moisture from roots to leaves.
- Use floating row covers (preferably), shade cloth, old sheets, or temporary shade structures to protect newly installed plants and in-ground succulents prone to sunburn. I employ rusty window screens. In an emergency, place upright leafy tree trimmings next to a plant you wish to preserve, on the side that receives the most sunlight. Or, in keeping with the sun’s movement throughout the day, use outside furniture.
Above: Aloe brevifolia, a stunning but stressed plant, has closed its rosettes and changed color from blue to pink.
- Learn how plants defend themselves. When the sun becomes unpleasant, succulents can’t flee to the shade, so some species create their own. Succulents with rosettes, such dudleyas, aeoniums, and some types of aloe, close their rosettes to save their critical cores. Lower leaves that become dry but don’t drop off serve a service by protecting flimsy stems from the sun in the summer and the cold in the winter.
- Where shade will be needed during the long, hot summer afternoons, plant trees and plants. (The Companion Plants chapter in Designing with Succulents, 2nd ed., has information on low-water cultivars suitable for succulent gardens.)
What sunburn looks like
The floppy leaves of this agave stretch (and weaken) the cells in those areas that are most exposed to sunlight.
Succulents with white, beige, or black patches have been sunburned, which causes irreparable cell damage comparable to frost. The plant is alright, but scars will endure just as long as the leaf.
These aeoniums generally have sunburn on the underside of their lowest leaves, which they will shed in a few months anyhow. Very effective, wouldn’t you say?
Several months later, the same aeoniums. Only a few scorched leaves are still visible.
It is preferable if the damaged parts are on the outer leaves because fresh growth from the rosette’s center will eventually cover up burnt spots. In any event, lower leaves naturally wither and fall off, damage or not. Recovery from a sunburn could take several months to a year, depending on the succulent and the time of year.
Related Info:
Summertime Succulent Watering. Okay, everyone is aware that succulents require little water. They aren’t “no-water plants,” though. Even though they might make it through the summer without irrigation… [Read more…]
A heat wave shouldn’t ruin your succulents. Succulents that are exposed to the scorching sun may burn when a heat wave follows cool weather. The beige or brown patches that develop as a result of sunburn cannot be removed. [Read more…]
Succulent Stress Management (and Why You Should). Some succulents exhibit beautiful reds and yellows when exposed to lots of sunlight, but how much “stress” the plants need depends on… [Read more…]
Will succulents with sunburns recover?
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.
How can I shield my succulent plants from intense heat?
Succulents in pots are particularly sensitive since pots can reach extremely high temperatures that are much above the predicted range. They may even be too hot to touch on particularly hot days! Put the pots of succulents in shade, or produce shade by erecting an umbrella above them or draping a shade cloth over them to prevent burns, complete drying out, or scorching to the point of collapsing.
Additionally, as dark pots heat up much more quickly than light-colored ones, it will be very helpful if they are not black or other dark colors. However, on an extremely hot day, even light-colored pots might become warm if placed directly in the sun.
The path of the sun should be taken into consideration while building a shade shelter for succulents. The sun can beam into the shelter as it moves during the day, especially later in the day. It will help to form sides. A plant can entirely burn in less than 30 minutes of exposure to the sun’s rays on a day over 40C/104F. The same is true for shifting potted succulents into shade.
If heatwaves are expected, putting succulents under a tree or in a shaded area for the remainder of the summer is an excellent idea. In order to prevent the succulents from losing their appeal and growing too leggy, it must be a bright shade outside.
Succulents enjoy the heat and should be able to tolerate temperatures beyond 50C/122F in the shade. Burns and death are brought on by the sun’s UV radiation.
Although we struggle in the heat, if we were in the shade, we would probably survive the day. However, in the full sun, our skin would burn and the heat may kill us.
How can you tell if your cactus has sunburn?
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!
What are the signs that my succulent is receiving too much light?
Do you ever wonder why a succulent doesn’t look as good as it did when you first bought it? If a succulent is otherwise healthy, light should be taken into account initially.
Insufficient lighting causes the leaves of succulent plants to become colorless. They may flatten or stretch as they transition from red, yellow, or orange to faded blue or green hues (etiolate). Conversely, when exposed to much sunlight, succulents may develop beige areas on their leaves or close their rosettes.
Don’t simply glance down at the nursery; look up as well. Give your goods accustomed sun intensity when you bring them home. They might astound you when they settle in and the seasons change. It’s realistic to anticipate that they will look much better after having time and space to spread their roots.
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.