Plants with thick, fleshy stems and leaves, such as cacti and succulents, have evolved to store water in arid areas. They have shown tremendous growth in popularity as indoor plants in recent years. They are for sale everywhere, including the majority of big-box retailers. Aloe plants, jade plants, sempervivum, kalanchoes, agaves, echeverias, snake plants, and Christmas cacti are just a few of the hundreds of kinds that are available. Due to their low watering needs and natural adaptation to dry soils, they are popular due in part to how simple they are to maintain. In actuality, overwatering cacti or succulents is one of the simplest ways to destroy them.
Succulents and cacti are in many respects ideal plants to grow in a greenhouse. The light that a greenhouse provides, which ranges from mild to bright, is ideal for almost all of them. They don’t outgrow their station because many of them tend to stay very little. Additionally, the most are relatively simple to propagate, making it inexpensive to build a sizable display of them. I had received some cuttings from a friend who maintains more than 500 different types of cacti and succulents in her greenhouse. I currently have a beautiful collection made entirely of these cuttings, some of which are potted separately and others in mixed cultures.
The majority of cacti and succulents grow in grittier soil because it permits plant roots to dry out quickly while still holding some moisture, as might be expected. Not your typical potting soil, this. To suit your plants, you’ll need to either buy or make such a medium. I’ve discovered that the grit in the cactus/succulent combinations that are sold are generally pretty huge and pricey. Therefore, I prefer to prepare my own blend of around 70% grit measuring about 1/4 (6mm) in diameter, 20%–25% crushed pine bark, and 10%–15% vermiculite or perlite. If desired, you can use peat moss or coconut coir (for a more alkaline mixture) in place of vermiculite or perlite (for a more acidic mix). In any case, the plants will only require watering every two weeks or so thanks to this mixture of chemicals, which drain swiftly while holding onto enough moisture.
Most succulents and cacti do best in large, shallow pots, trays, or dishes. Due to these plants’ present popularity, a wide range of sizes of highly appealing pots are readily accessible. However, some succulents and cacti are better suited to a different type of pot. For instance, the rattail cactus grows best in a hanging basket or a large dish held in the greenhouse high enough for the “tails to hang down. The weight of the tails can occasionally drag the pot over and cause it to fall if you try to grow it in a shallow dish that is set on a shelf. It is definitely not advised to grab the falling plant by its long, extremely prickly tails, as I once did! Although rattail cacti don’t typically bloom, when they do, their vivid pinkish-red flowers create an impressive display.
Succulents and cacti typically don’t require much care, including watering requirements. Only water them when the earth seems completely dry. Use a squeeze bottle or a watering can with a spout that is no wider than about 1/4 (6mm). Avoid soaking the plant’s leaves or crown, as this might lead to rot in some species of plants. Don’t water again until the soil is completely dry when the earth is thoroughly moist. With little amounts of water every time, repress the impulse to drink more frequently. You often end up with a plant with a shallow root system if you water it sparingly, and it could perish if you don’t water it again.
Succulents and cacti don’t require special care when it comes to fertilization. They often only receive a small amount of fertilization in the wild from stray bird or animal droppings. You can infer from this that your greenhouse plants don’t require a lot of fertilizer either. In fact, the majority of experts advise fertilizing them just once a year with an all-purpose, balanced fertilizer that is quite weak—a 10-10-10 or 8-8-8 at around half strength—and for all purposes. Of course, you can use a weak manure tea if you want to seem more genuine (made by submerging a bag of horse manure in a 55-gallon pail of water for a few days). However, even this should only be applied at about half strength. The fact that cacti and succulents require little maintenance is a big factor in why so many people are now growing them in greenhouses and homes.
Can succulents survive the summer in a greenhouse?
The exotic varieties of succulents, which make wonderful container examples, are among my favorite plants.
Succulents are a good option to grow if you enjoy gardening but lack the time to give your plants the required care. Succulents store moisture in their thick stems, roots, and leaves, which is why they are so low maintenance and can endure lengthy periods of drought. Some succulents have the appearance of smooth stones, while others have beautiful rosettes or look like strings of vibrant green beads.
The side of my main greenhouse where I put a lot of my smaller succulents in pots has a lot of light. The majority of kinds require a full day of sunshine or at least half a day. It is advised to find some afternoon shade in excessively hot locations.
Because of their eye-catching shapes, succulents are frequently planted as attractive plants. Because the containers dry fast and keep water from accumulating, it is better to plant them in clay or terra cotta pots with adequate drainage holes.
As many of you are aware, I like Guy Wolff’s wonderful ceramic creations. They are incredibly nicely built and gorgeous. I own a large number of his watercraft. In fact, Guy claimed my collection of his ceramics is the largest he has ever seen when he visited my property last year.
Haworthia coarctata is what you see. It is a vigorous succulent plant with long stems that can reach heights of up to eight inches. Normally dark green, it can occasionally turn a rich purple-red under direct sunshine.
The magnificent hanging basket plant Sedum morganianum, sometimes referred to as burro’s tail or donkey’s tail, is one of the best. It has short, thick leaves that are densely arranged on wiry stalks.
This is a different kind of sedum. A huge genus of blooming plants called Sedum is also referred to as stonecrops. They quickly spread.
If you recall, I filled my new Martha Stewart fake bois planter boxes from QVC with a lot of succulents. The planters feature a realistic bark texture that I created. Each is roughly 30 inches long by 15 inches wide, and it has three drainage holes in the base to let excess water out. Additionally, it has a stand of its own. Check it out on the QVC website, please. goo.gl/QZe4zc
Mostly echeveria is found in the planters. Echeveria is a sizable genus of flowering plants that are native to semi-desert regions of Central America, Mexico, and northwestern South America. They are members of the stonecrop family Crassulaceae. I have echeveria in purple and green tones.
This is the Echevaria runyonii variety known as “Topsy Turvy,” which has pale leaves that curve upward, are highly inversely keeled on the bottom surface, and have leaf tips that point inward and toward the center of the plant.
Previously known as Haworthia fasciata, this now Haworthiopsis fasciata. This succulent grows slowly and heavily sucker, forming dense clusters. On the underside of its leaves, it features silvery white elevated pearly tubercles that unite to form bands that resemble “zebra stripes.”
The genus Agave belongs to the broadly defined family Asparagaceae’s subfamily Agavoideae of succulents. This agave is called “Queen Victoria.” This graceful, dome-shaped plant features deep green, dramatically white-edged, and patterned leaves. Many of you are familiar with the enormous agave plants I keep in my tropical greenhouse and display during the summer on the farm and up at Skylands.
It’s Aeonium “Kiwi.” This succulent produces rosettes of spoon-shaped, fleshy leaves in vibrant colors.
Another succulent grown for its ornamental foliage is the senocio. The leaves of the Senecio haworthii, or cocoon plant, have a dense coating of silvery white hairs and are fashioned like cocoons.
This is Senecio radicans, sometimes known as the fish hook plant or banana thread. The plant looks beautiful trailing over a planter.
Succulents can take on a variety of fascinating growth patterns. When I have company over, I frequently bring succulents inside the house; they enjoy discovering the various species.
These resemble pearl strings. Senecio rowleyanus, often called string of pearls or string of beads, is an Asteraceae-family perennial creeping succulent vine.
Cacti genus Rhipsalis contains about 35 different species. In my greenhouse, I have a variety of rhipsalis species growing.
One of the most unusual indoor cacti is the ric rac cactus. It boasts unusual foliage; the thick, leathery texture of the stems, which are lobed and serrated like a backbone, nicely complements the dark green color. The ric rac cactus will blossom with lovely pink and white flowers that resemble orchids if it receives adequate light.
During a trip to Phoenix for work last year, I purchased this most unusual cactus.
I bought this one too when I was there.
This cactus resembles a flat rock formation.
In a subsequent blog, I’ll show you more of my fascinating collection of cacti. Which succulents are your favorites? Comment below and let me know. I take the time to read all of your stories and comments.
Can you grow cacti in a greenhouse without heat?
In general, yes, you can grow cacti in an unheated greenhouse all year long. Of course, it depends on how cold it gets where you live and what kinds of cactus you are cultivating. Although many species require a frost-free environment, some may survive sporadic frosts.
Lightuse polycarbonate glazing to allow maximum sunlight.
Cacti in the desert need a lot of light. In a greenhouse, the light might not be strong enough for them. UV rays are blocked by ordinary glass, which is also frequently dusty. The plastic cover may quickly start to look worn. However, corrugated polycarbonate glazing is the optimum glazing for a greenhouse where cacti are grown since it transmits light at a rate of up to 90%.
Temperatureabove freezing in winter and a maximum of70F in summer.
The species of cactus determines how cold is too cold for them. Most cacti demand frost-free temperatures of at least 32°F (0C). However, certain cactus species from the Chihuahuan Desert can withstand wintertime lows of -5F (-20C).
It contains vegetation from the region’s Mexican portion. A greenhouse needs to be ventilated in the summer when the temperature reaches 70°F. On hot July afternoons, don’t forget to apply shade cloth. Within one afternoon, intense sunshine can quickly result in sunburn or yellowing.
Wateringno water in winter and each time compost dries out in summer.
Between November and March, desert cacti require little or no watering. Water cactus well in the summer to ensure optimum growth and consistent flowering. Every time the compost starts to dry out, water the cactus.
Growing Medium1/3 sand and 2/3 multipurpose compost.
In a greenhouse, cacti require sandy compost to flourish. In general, a growing medium made up of two parts multipurpose compost and one part grit works well. It will drain efficiently.
Humiditycacti thrive in dry air.
Cacti do not thrive in humid environments. Therefore, in a greenhouse, you need to be cautious of humidity and maintain it low. You’ll need to ventilate with a cool fan to do that.
Best Types of Cacti That Do Well In A Greenhouse:
The most widespread species The simplest cactus to cultivate and put into bloom is Aporocactus flagelliformis, popularly known as the rat-tail cactus. It is a plant for a hanging basket or pedestal plant stand.
This is due to the 1.5-inch-wide cylindrical stems’ tendency to droop and annual growth of many inches. In the spring, flowers should start to bloom. They are 3-inch-long tubular flowers with an opening and closing time of day and night, respectively.
In the wild, the Cephalocereus senilis, also known as the Old Man Cactus, grows to a height of 50 feet, however in a greenhouse, it only grows to 1-1.5 feet. About 30 shallow ribs, small spines, and long, silvery hairs cover the Old Man cactus. However, on Old Man cactus in a greenhouse, the pink blossoms are infrequent.
There are about 33 species of cacti in the genus Cereus, which are ribbed and columnar in shape. Cereus peruvianus is a favored plant for many gardeners to grow in a greenhouse. The stem is 2-3 feet tall, and the ribs have brown spines. On established plants, summertime sees the appearance of 6 inch long funnel-shaped flowers. The nighttime blossoming of these blooms on this cactus is mildly aromatic.
It also goes by the name of barrel cactus. It has a ribbed spherical form with sharp spines. Slow-growing cactus species include barrel cacti. For instance, the Golden Barrel Cactus, also known as Echinocactus grusonii, has yellow spines and takes 15 years to flower.
This species can be found in globular or columnar shapes. Echinopsis is also referred to as a hedgehog cactus or a sea urchin cactus. Sharp spines and protruding ribs are features of this species. Their blooms, however, are very stunning.
While E. aurea blooms with yellow flowers, E. eyriesii blooms with white, fragrant blossoms. Because the sea urchin cactus is a hardy plant, it may be grown in a greenhouse without heating.
Because it requires little maintenance, stays compact, and produces flowers, it is referred to be a beginner cactus. The blossom comes in a variety of hues, including white, red, pink, yellow, and orange. From late spring through early October, these cacti blossom. Each flower only lasts a day.
Likewise called the pin cushion cactus. It is a sizable genus with numerous species. While some of them are simple to care for, others can be rather difficult. The most typical design is a globe without ribs, but with spine-topped tubercles.
The flowers develop in a ring towards the top of the ball and are frequently fruit-producing. The species known best is M. bocasana, which has white blooms, silky hair, and hooked spines.
Prickly pears, also known as opuntias, are indoor plants that resemble flattened pads with yellow blooms growing around the edges. Fruits that are edible can also grow on the blooms. O. microdasys, often known as Bunny Ears, is the most well-known species and reaches 1 foot tall with golden bristles and yellow flowers.
These cacti, often referred to as Old Man of the Andes, feature an oval, columnar stem that is 3 feet tall and branches that grow out of the base. They are known as Old Man because of their long, white hair covering, which causes their yellow spines to turn red with age. Red blooms on cactus bloom in the summer.
Tom Thumb or Parodia Small, globular, and beginning to flower at an early age, cacti are. Their spines are likewise colorful. P. aureispina has yellow flowering while P. sanguiniflora has red blossoming.
Also known as a crown cactus, it is simple to grow and begins to bloom at one year old. The tubercles on the ball-shaped stems are present. The tall, funnel-shaped flowers that sprout close to the base have long tubes. Flowers might be orange or pink, and cacti bloom throughout the first few weeks of summer.
I sincerely hope you found this blog post helpful. Tell me in the comments area below what cacti you cultivate in a greenhouse.