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…]
Are succulents kept indoors heated?
Take into account the following variables while choosing an artificial light or grow light:
Determine the brightness of the light emanating from the bulb. For photosynthesis to take place in plants, a specific amount of light is required. Lights that produce at least 2,000 lumens per square foot are required for succulents.
The more watts a light uses, the more it will cost you on your electricity bill. Look for energy-saving light bulbs that will provide the necessary brightness at a cheaper cost.
The entire light spectrum can be found in sunlight. Indoor plants thrive in full-spectrum bulbs, which mimic natural sunshine and offer a balance of cool and warm light, just like plants that are grown outside. The ideal color temperature for succulents is at least 5,000 kelvins, which will provide full spectrum light similar to sunlight for your succulents.
Knowing how much heat the light produces is crucial. If you give your plant insufficient heat, it will not receive enough and it could burn. The intensity of the light also affects how far or near you should set your plant from it and how long you should leave it beneath it.
Both create light that is full spectrum. Low light can be fixed by fluorescent lighting, but it uses more energy. LED lighting is more energy-efficient and durable than fluorescent lighting.
The Effects of Temperature on Succulents and Cacti
Succulents and cacti prefer to reside in the “sweet spot” of temperature, just as is the case with sunlight exposure. These hardy plants can suffer irreparable harm from either extreme of the temperature range, so it’s important to monitor their health and adjust the environment as necessary.
Succulents and cacti thrive most effectively in temperatures between 40 and 80 °F. Outside of this range, little temperature swings are tolerated, but swings of five or more can result in permanent harm. Even more intriguing is the fact that temperatures that are on the edge of the bearable range (about 40°F or 80°F) can operate as “stressors,” positively affecting the plant and encouraging the expression of more vivid hues.
Succulents and cacti should ideally be kept above freezing during the winter to prevent frost damage. While more tropical types like euphorbia and lithops demand minimum temperatures of 50 to 60 degrees Fahrenheit, other cultivars are actually frost hardy and prefer cooler overnight temperatures of 30 to 40 degrees. Searching for “ideal temperature for insert plant name here” on Google is currently the quickest approach to find out what temps are optimal for your plants. Each plant product page will eventually feature our own documentation.
Extreme Cold and Extreme Hot
Succulents and cactus can, you guessed it, freeze when exposed to freezing or below-zero weather! The water that has frozen inside the plant’s cells expands as it thaws, killing the cells by rupturing them. When the plant finally thaws out, the damaged regions will start to decay or scar permanently—a symptom that could take a few days to manifest. To stop the rot from spreading, the best course of action in this circumstance is to remove the afflicted region with a clean razor blade.
It is preferable to relocate your collection under a patio cover or inside of your home while the freezing conditions last in order to prevent damage from frost and freezing temperatures temporarily. A “frost blanket,” which is just a thin piece of fabric designed to protect plants from cold, can also be used to cover your plants. Plants should be taken indoors for the winter or placed in a sunroom or greenhouse with plenty of natural light in regions of the country where cold temperatures last for months at a time (essentially everywhere else save California).
However, heated temperatures can also do harm if they are not controlled, so they are not the only bad guys in this tale. A variety of things can happen to your plants when it becomes too hot (90 degrees Fahrenheit and above), especially when combined with full sun exposure. For example, leaves may shrivel and/or burn, water inside plant cells may steam and explode, and root systems may become fried.
Because soil is not a very good conductor of heat or cold, succulents planted in the ground with developed root systems can withstand high heat and cold more better than those planted in containers. On the other hand, containers easily conduct heat and cold, focusing such extremes on the roots of the plants.
There are always exceptions to the norm, just like there are in everything else in life. Succulents can withstand temperatures well below freezing and temps as high as 100 degrees. Drive about and observe what sorts of succulents your neighbors are successfully cultivating to find out what varieties work best in your specific climate.
Moisture and Extreme Temperatures = Bad News
Extreme heat and dampness are among the most troublesome environmental conditions. You should never put your plants in a situation where they are both hot and damp or cold and wet. Whether in the ground or in containers, plants that are grown in dry soil perform far better than those that are not. The water in the soil might start to steam in exceptionally hot weather, thus “cooking” your plants. Water can obviously freeze in freezing or subfreezing temperatures, harming the root system and producing rot. If you absolutely must water your plants when extremely high temperatures are predicted, try to do so as early as possible, ideally before 7 a.m.
The TLDR (too long, didn’t read) Summary
Average temperatures are much preferable to harsh ones for succulents. Frost damage can occur in cold conditions, whereas scorching and atrophy can occur in hot temperatures. Paying attention to what your plants are saying is the simplest method to make sure they are content. Bring them indoors or wrap them in a frost blanket if they are suffering from frost damage. Move them to a sheltered spot or cover them with shade cloth if they are scorching or wilting.
Can succulents live in the absence of sunlight?
The most light is reflected from south-facing windows throughout the day in the northern hemisphere. The sun shines through windows facing east in the morning and west in the afternoon and evening. The least quantity of sunlight enters windows that face north.
A south-facing window is the best choice for the majority of sun-loving succulent plants in the northern hemisphere. However, all of the low-light succulents covered in this article happily flourish in windows that face west or east. Even in a dark, north-facing window, some of them will make it, but I don’t advise it because even there, they won’t thrive.
However, no succulent can live in a completely dark environment. Therefore, even if your succulent plants are varieties that thrive in low light, think about buying a tiny desktop grow light if you live in a basement flat, have only a north-facing window, or if your space has no windows at all. When a modest grow lamp is placed over low light succulents for 6 to 8 hours a day, you’ll be astounded at how well they grow. You won’t need to remember to turn the lights on and off every day if you have a reliable timer.
Now that you are aware of how much sunlight low light succulents require, allow me to introduce you to some of the greatest low light succulents.
Succulents can they get too cold?
Whether a succulent is a soft or hard succulent determines what temperature it can withstand.
Anything warmer than 32 degrees F will be enjoyable for soft succulents. preferably over 40 degrees.
These plants cannot endure colder than freezing temperatures. Their hefty, thick leaves, which serve as water reservoirs, will freeze and destroy the plant.
Succulents that can withstand the cold can sustain -20 F. The best it can manage is a zone 4 to 5, and let me tell you, that is very impressive.
You must keep in mind that even if they can withstand temperatures below zero, they still like dry soil. That remains constant.
The majority of winters in the contiguous US will not only be dry but also wet and snowy.
Succulents—can they survive in a windowless bathroom?
Yes, if you pick the appropriate variety. In actuality, there are several advantages to bathroom plants. They can remove bacteria, filter the air, provide some greenery and nature to one of our more antiseptic spaces, and absorb extra moisture. They are also totally current. The high humidity of a bathroom must be taken into account while choosing a plant, as well as sunshine. Houseplants may struggle if your bathroom is in the middle of your property without a window or any natural light.
Here, your options are more limited because they must be able to withstand both high humidity and low light conditions. A windowless bathroom might benefit from the presence of peace lilies, Boston ferns, philodendrons, spider plants, aloe vera, English ivy, and snake plants, among other plants.
If you have adequate space, putting plants in the shower is a growing trend. Safety should be prioritized in this situation. Bathroom plants should not be placed in an area that is already slippery or where they could pose a trip hazard. Having said that, a eucalyptus “bath bouquet” that is suspended from the shower head is a common shower plant. The aromatherapy properties of the eucalyptus are released by the steam and heat from the shower.
Succulents should not be used in a small or windowless bathroom since the greater moisture levels there will cause them to rot. They work well in a spacious bathroom or on a windowsill in the bathroom.
Without further ado, the top bathroom plants are listed below. Select the best option for your style and room…
This tall bathroom plant gives any room a sense of height. Snake plants, also referred to as mother-in-tongue, law’s can live in low light and thrive in high humidity. The lengthy leaves can assist in removing airborne pollutants.