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…]
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. High temperatures from 80F to 90F can sometimes help maintain the deep colors for many succulents, especially for soft succulents. As the temperatures drop (but stay above 40F), you’ll notice many colors will start to intensify. These colors are accentuated from the cold (but not freezing) temperatures over an extended period of time. Be aware that temperatures either too low or too high can cause the colors to fade.
During the hottest hours of the day, you should move your succulents to a shaded area or cover them with shade cloth. Those who live in areas with extremely hot weather should consider planting your succulents directly into the ground instead of in containers because the temperatures of soil stay relatively constant. In the summer, the combination of high temperatures and full sun exposure can cause sunburn for your succulents, damaging both the leaves and the root systems.
Some cold hardy species, like Sempervivum, can tolerate frost and enjoy cool temperatures from 30 to 40F, while other tropical species, like Euphorbia and Lithops, prefer temperatures of at least 50-60F. To determine precisely whether a particular succulent variety is suitable for the weather in your areas, check the growing conditions of the variety in question.
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:
How can summer succulents be kept alive?
9 Plant-Care Tips on How to Take Care of Succulents (And Not Kill Them)
- Ensure That Your Succulents Receive Enough Light.
- Repeatedly rotate your succulents.
- Depending on the Season, Drink Water.
- Directly water the soil.
- Keep your succulents tidy.
- Pick a container with a drainage system.
- In the proper soil, grow succulents.
- Eliminate bugs.
Succulents can they get too much sun?
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!
Are cacti safe to grow outside?
Succulents are drought-tolerant plants because they can retain water in their large, irregularly shaped leaves. Succulents have a broad variety of eye-catching shapes and textures, which provide any landscape aesthetic interest. Can succulents live outside? is an often asked question. The quick response is “yes”! Growing succulents outdoors is an excellent alternative because they do well there and can withstand some neglect. They also do well in sunny areas with warm, dry weather.
Succulents can be grown in the ground, in pots, or hidden in unexpected planting locations. Take the uncertainty out of caring for these wonderful conversation pieces with stunning foliage by reading our suggestions for growing succulents outside.
In hot temperatures, how frequently should you water succulents?
Summer is coming up quickly! Additionally, proper watering is crucial for happy, healthy succulents as temps climb.
There is a widespread misperception that succulents require little or no water. Given that such fat leaves store a variety of reserves for the plants, there is some validity to the statement “require very little.” However, because of their reserves, they require less irrigation overall than other plants. The truth is that succulents like water, and they prefer to be deeply irrigated, once their reserves have been somewhat depleted.
Frequency
You should water your succulents roughly once a week if you are keeping them outside or in a greenhouse throughout the summer. The soil should be getting close to being completely dry, but not for too long.
Technique
Make sure to water established plants until their deepest roots are submerged in water. As a general rule, keep watering until water begins to emerge from the pot’s bottom. Deep watering will encourage strong root development, which will make the plants healthier. A less established plant and a shallow root system are the results of frequent, superficial watering.
But succulents don’t like to stay in moist environments for too long. Drainage is crucial, thus. In the ground, adding some pumice to your soil will improve drainage. A well-draining potting mix and a container with a drainage hole will work for your container garden.
Here is an illustration of two identical haworthias that were cultivated using various watering techniques. Lightly watered on the left, intensively watered on the right till the water flowed out of the bottom of the pot. The end result is that the haworthia on the left is smaller and its root system is less established. The haworthia to the right is full, has a solid root structure, and is beautifully colored green.
Timing
The optimum time of day to water succulent plants in the summer is in the early morning before temperatures rise. You may prevent hot water from sitting in the crown of your plant and perhaps scorching it by avoiding watering in the afternoon when temperatures are at their highest.
If watering in the morning is not possible, watering in the evening is an option. This is a bad idea to do in the cold, though. In the colder months, keeping the plants damp all night makes them more vulnerable to fungus. To be safe from such cultural concerns, we err on the side of keeping our plants a little dry over the winter.
Exposure
Remember that, like us, succulents require a little more sun protection during these hot summer months. If their leaves are left in the sun for an extended amount of time, they will burn. We advise keeping your succulents in a position with dappled shade from a tree or under an awning for partial shade.
The health of your succulent depends on water. A vigorous plant that is more resistant to pests and disease will result from good root health and good watering. Additionally, the other living organisms in your garden need on water. Bees, butterflies, and hummingbirds are just a few of the pollinators that depend on the water we water our plants with.