Cactus plants that thrive in cold climates prefer many of the same environmental factors as their southern cousins, such as lots of light. Some of the most typical maintenance needs for cold-weather cacti are listed below.
How to Plant Cacti
Cacti need soil that drains fast, but pure sand shouldn’t be used because it doesn’t contain enough nutrients to support their growth. It is recommended to combine typical garden soil or topsoil with 40 to 60 percent coarse sand and up to 10 percent compost for a nutrient-rich, quick-draining mix when growing cacti. Fine-grain sand should be avoided since it can clog soil instead of improving drainage. Cactus plants should not have the soil around their shallow roots disturbed after planting. Pea gravel or other small rock mulch helps control weed growth, keeps the soil temperature constant, and protects soil from blowing away.
In order to offer optimum drainage, raised beds are advised. You need more drainage the more rain your area receives. Cacti should be grown in pots under cover, such as a roof overhang, in extremely moist areas. Cacti should never be planted on normal or clay soil since they are easily overwatered and will perish.
Watering Cacti
In the winter or fall, refrain from watering cacti. To get ready for the upcoming weather, cactus plants start to contract and seem withered and unappealing. This is a typical phase of their hibernating process; but, if you water them at this time, the extra water may freeze and destroy the plant.
The best strategy is typically to let Mother Nature take care of watering your cactus over the rest of the year. You can feel free to water your cactus, though, if there are several weeks in a row of hot, dry weather without any rain. The plants are probably trying to notify you they need water if the soil is completely dry and they appear limp or are starting to droop. Avoid watering the plant directly and properly soak the soil for the greatest effects.
Fertilizing Cacti
In-ground cactus plants don’t require a lot of fertilizer, although they can benefit from spring applications of compost or a liquid fertilizer made for use on vegetables or bulbs. Avoid fertilizers that contain a lot of nitrogen (the first number of the three shown on the package). Nitrogen promotes quick growth, but it can also make a plant too delicate and prone to winter damage, especially later in the growing season.
Protecting Cactus Plants
Contrary to popular belief, cold-hardy cacti can thrive in regions with a lot of snow. Cacti can, however, suffer from frostbite in regions with cold temperatures and strong winds but minimal snowfall. As late in the growing season as feasible, carefully wrap the plants in burlap to prevent damage. The burlap shields the plants from the sun, cold, and wind while allowing them to breathe. In order to protect the cactus plants from too much moisture during warmer winters, carefully erect a structure over them, such as a canvas tent.
In cold weather, should I cover my cactus?
The hardiest cacti don’t require protection when it gets below 25 degrees Fahrenheit and can withstand temperatures well below zero. Echinocereus species, also known as hedgehog cacti, have clumping stems that grow in mounds and frequently exhibit intriguing spination. Large, showy, and frequently vibrantly colored flowers are common. Plant hardiness zones 4 through 9 of the United States Department of Agriculture are suitable for the green-flowered hedgehog (Echinocereus viridiflorus). This plant, which is indigenous to grasslands and foothills from New Mexico to Wyoming, has vibrant spines and yellow-green blooms. Hummingbirds are drawn to the bright red-orange blossoms of the claret cup (Echinocereus triglochidiatus), which is hardy in USDA zones 5 through 10. The beavertail cactus (Opuntia basilaris) features magenta or yellow blooms and azure pads. USDA zones 5 through 10 support its growth.
How can a cactus be frozen by being covered?
Cover your cactus’ developing tips with styrofoam cups. This will keep them from freezing. They won’t be harmed by it. The majority of cacti are currently inactive and not growing. This past summer’s growth was delicate and has to be protected.
To prevent it from being blown off by the wind and endangering your plants, tie on any frost protection you use. Large-bulb Christmas lights will also keep plants warm, especially those big specimens that could be challenging to cover.
Never use plastic on your plants directly! Plants will freeze as a result of this moisture trap.
How should I care for my cactus over the winter?
Cacti and succulents are excellent low-maintenance plants that add color to the home even on the gloomiest winter days. They provide aesthetic appeal to any table or windowsill with their unique forms and textures, and with proper care, they’ll last the entire long, cold season.
Cacti and succulents are suitable indoor plants all year round. Plants simply only a little light and sporadic watering during the winter. By the time fall arrives, the majority of cacti and succulents have gone dormant and will no longer grow as the weather and light conditions change.
5 Techniques for Winter Cactus and Succulent Care:
1. Plant your dormant plant in a location where it will flourish to make your cacti or succulents happy. During the winter, succulents require less light and can also tolerate indirect light. Make sure your plant receives at least three to four hours of bright light each day for the best results. Locations are happiest close to windows that face south or east.
2. Sandy, well-drained soil is best for growing succulents. Give your plant the nutrients it requires by using Espoma’s cacti and succulent mix. Make sure containers have drainage holes to allow extra water to drain because succulents can’t tolerate excessively moist soil.
3. Set the thermostat. Few succulents can withstand temperatures that are much colder than 50 to 55 degrees.
4. Succulents require deep watering, although they won’t need as much as they do during active growth. Use little water and only from the top, letting water seep through to the bottom. Keep plants out of water for brief periods of time. Keep water away from the cactus’ body since it can cause decay.
5. Look for vermin. Check your leaves every month for mealy bugs and aphids. If a plant is infected, remove it from the vicinity of other plants and spritz it with a solution of 3 parts rubbing alcohol to 1 part water.
Help your cactus adapt
Enabling your cactus’ natural adaption mechanisms is the first step in defending it against frost. Allow the cactus to gradually adjust to the cold weather as the temperature drops in the days before the first frost.
You can allow the cactus to enter its dormant stage, stop growing, and have less moisture in its cells by reducing the amount of water you provide it.
Shelter your cactus from cold air
One of the precautions you may take is to shield your outside cactus plants from the chilly air if the frost is not too severe. If you have a little plant that you can move, do so to a more protected location, such as behind a wall or away from strong winds.
Outdoor furniture is another option for cactus protection. Your cactus will benefit if you place a chair over it because it will trap some of the heat. If you have a smaller cactus, you can also turn plastic containers over the plant while leaving a little opening for air to enter from the bottom.
Cover the soil with stones or mulch
In some cases, when the temperature drops, the earth might lose its heat quickly. Covering the ground with things that can assist trap the heat is one technique to save your cactus.
Some darker stone varieties are excellent for trapping the soil’s heat. Depending on the environment, black lava rock or red and brown rocks can aid in keeping the soil warm.
Mulch can be used to cover the soil as an alternative to stones. Mulch will keep your cactus comfortable by retaining heat. You must be careful not to use too much mulch, though, since this might trap moisture and lead to rot in your cacti, which cannot tolerate excess moisture.
Move your cactus indoors
Bring your cactus indoors if you live somewhere that gets really chilly. There are, however, a few considerations to make before doing so. First off, it’s crucial to avoid shocking the cactus with a fast shift in temperature, humidity, or light since this could impair its ability to adapt naturally.
When bringing your cactus indoors, be sure to choose a location with enough sunlight or furnish your plant area with a cactus-specific grow light. In order for the cactus to absorb as much sunlight as it need, you must also make sure that no dust or other obstructions are covering its surface. Make sure to modify your room’s temperature and humidity so that they don’t fluctuate much from the weather outside.
Make a frost blanket
This is a quick and easy technique to insulate your cactus from the cold. Several techniques are available for achieving this. There are high-quality, specialized frost blankets that keep the heat in the air layer surrounding the cactus.
Burlap, plastic sheets, and other materials are also options. While burlap will allow airflow and frost cloth, particularly if it is white, will let sunshine through, if you are using a plastic sheet, make sure to leave area for air.
Making ensuring the blanket doesn’t touch the cactus in any way is a crucial consideration. Wherever the material touches the cactus, it will produce a drop in temperature and result in areas of frost damage because the heat in this manner comes from the layer of trapped air.
To support the blanket and prevent it from moving, use a chair or other sturdy object. If it’s very chilly where you are, you might need to wear several layers of clothing. Another choice is to put a tiny artificial light inside the blanket to raise the warmth even further, especially if you’re doing this inside.
Can cacti withstand frost?
Most people think of desert plants as cactus plants. This conjures up images of arid regions with exceptionally high annual temperatures for many people. The truth is that hardly all deserts are really hot, and those that are typically get rather chilly at night. It follows that the ability of cactus plants to survive in cold climates is not surprising. This brings up the most contentious issue surrounding these plants.
Cacti can withstand the winter. Yes is the clear answer to this. Even during the darkest days of winter, cactus plants may still enliven your indoor space even if the bulk of them are used to surviving in arid places. Any cactus plant’s optimum temperature varies depending on its species. Others can survive in temperatures below 0oF whereas certain species cannot endure temperatures below the freezing point.
In order to prevent the surplus water that is held in the roots and stems of many cactus species that can withstand extremely cold temperatures from freezing, these plants typically release water at night.
What degree of cold can a cactus withstand?
If you have enough light, cacti are some of the most rewarding houseplants. Few blooms can match them in terms of color, size, or beauty. Space is typically not an issue because most cacti grow slowly. They are extremely resilient and flexible. They do not “thrive on neglect,” unlike what the general public thinks. They “thrive on gentle loving care, like most plants, but they will at least “survive on neglect.”
Except for epiphytic (tree-dwelling) cacti and succulents like the Christmas cactus, rhipsalis, and orchid cacti, which demand less sunlight, greater humidity, and more watering than other species, the general care instructions below apply for cacti and most other succulent plants. They also prefer fertilizer with a higher nitrogen content. Compared to other species, add less sand to your potting mixture. Other succulents such as haworthias likewise favor brilliant indirect light over direct sunlight.
Light
Give cacti and other succulent plants the brightest or most sunny windows you have indoors (four to six hours of direct sun). They will grow abnormally long and thin in low light conditions. Your plants will benefit greatly from spending the summer outdoors in the morning or late afternoon sun, when there is greater air movement and light. The majority of succulents can withstand intense outdoor sun, but they must get used to it. When putting plants outside, place them in partial shade or shadow at first and gradually expose them over the course of a few weeks to the strong late spring and summer sun.
Spiny and woolly species need the greatest sunlight, whilst spineless species typically need shade during the midday hours. If your plant has a reddish tint, it may be because the amount of sun it can withstand is reached or exceeded.
Watering
When you water, make sure to water well and wait until the soil has dried before doing so again. In particular, succulents are vulnerable to rot from excessive watering. If the earth around your plant is already moist, NEVER water it. Pots that are dry weigh less than wet ones. When the soil inside clay pots is moist, they feel chilly and damp to the touch. When the soil has enough moisture for the plant, succulent leaves are solid and plump.
The majority of cacti and several other succulents prefer to maintain a significant amount of dryness during the cooler months of the year (usually October through April). Over this time, drink less water than usual. To encourage new growth in the spring, spray your plants in the early morning hours of warm days. The spines of plants will allow them to absorb moisture. In order to prevent new roots from being stifled by excessively damp soil during the early spring, we also advise watering plants from the bottom of the pot. Fill the plant’s saucer with water, give the soil, pot, and plant around 30 minutes to absorb the moisture, and then drain the extra.
If you embed your plants in a mixture of 50% coarse builder’s sand and 50% peat, they will grow to their fullest capacity if they are in clay pots. This stops the soil from drying out too quickly and enables the roots to grow in the consistent wetness that the peat/sand mixture creates. Make sure there is excellent drainage in the tray that contains the peat/sand mixture.
Temperature
Keep succulents and cacti above freezing in the winter. Some plants require a temperature range of 35 to 40 °F at night (some cacti and other succulents can endure temperatures well below freezing if kept absolutely dry.) A minimum temperature of 50–60 degrees is preferred for more tropical succulents like adeniums, euphorbias, lithops, and stapeliads.
Plants need to be shielded from intense heat in the summer since potted plants’ root systems are more susceptible to harm. Good air circulation and cautious watering will prevent fungal and rot issues in humid and hot conditions.
Fertilizer
From May to September, feed your plants once per month using a fertilizer that contains low nitrogen (10% or less), such as 5-10-5 or 10-30-20. Nitrogen overload promotes excessively quick green but weak development. As the majority of cacti have evolved to thrive in nutrient-deficient soils, always dilute the fertilizer more than the label recommendations suggest.
Repotting
In the spring or early summer, repotte. When young, most plants like annual repotting with just one pot size increase. Without relocating the plant to a larger pot, you can carefully remove the top inch or two of soil after you reach roughly a 6-pot size and replace it with fresh mix. Since succulents are typically heavy plants, especially when potted in clay, moving them into ever bigger containers can be challenging.
Steer clear of soils that contain a lot of peat moss. Peat retains moisture for too long and is difficult to remoisten after being fully dried (a frequent occurrence with most succulents). You can add some coarse builder’s sand to the soil to promote drainage and a tiny amount of peat to the soil to improve texture. As much as 40% sand is appreciated by stapeliads, wooly cactus, and lithops (living stones). The base of the plant should have a top dressing of fine gravel since it encourages greater water absorption into the soil, shields it from excess moisture, and looks good too. For every 3 inches of pot size, add a tablespoon of gypsum and bone meal, if possible.
Use a pair of wooden tongs or a piece of newspaper that has been rolled up to help plants with a lot of spin out of their pots. If the plant is resistant, resist the urge to pull it out because doing so will harm the roots. Try again by striking a hard surface with the pot. As much soil as you can take out without harming the root ball. To prevent rot, always repot the plant at or higher than the prior soil level. You might need to stake species of columns. To give new root hairs time to grow after repotting, wait a week or two before watering.