Flowers are produced by Christmas cacti during a chilly, brief day cycle. It takes at least eight days of 16 hours of darkness and 8 hours of light every day for flower buds to begin to form. No matter where the plant is located, avoid using the lights at night, even for a little time.
What causes the Christmas cactus to bloom?
At the Information Desk, we occasionally receive inquiries that appear more complicated than they actually are. “Why is my Christmas Cactus flowering in March?” was this week’s riddle. This is actually pretty easy to answer: Because it is an Easter Cactus and not a Christmas Cactus.
Most people imagine Christmas Cactus when they see this plant. By the end of the year, you can get them almost anywhere – in grocery stores, big-box retailers, or even in white, red, or pink hues.
Three distinct cactus from the same family have collectively come to be known as “Christmas Cactus.” What most people mistakenly believe to be a “Christmas cactus” is actually a Thanksgiving, Christmas, or Easter cactus. How do you distinguish between the two? Is it currently in bloom? Which month is it now? Is it early November, late December, or the end of winter/beginning of spring? You may get a major hint from that. The leaves, though, are where you can really tell them apart.
The leaf parts of all three plants are mushy and flat. The edges of the leaves on Thanksgiving cactus are longer and curled. The Easter cactus has only gently scalloped leaf margins, whereas the Christmas cactus has smaller, more right-angle-like projections. These succulents are part of the Schlumbergera genius of succulents (although Easter cactus has multiple accepted names: Schlumbergera gaertneri, Phipsalidopsis gaertnerii, Rhipsalidopsis gaetneri or Hatiora gaetneri). The Brazilian woodlands are home to all three.
These cacti have a very long lifespan and are frequently passed down within families from one generation to the next. This image is from a Bismarck Tribune article about a family’s cactus, which is 111 years old. Writer Ann Parr wrote about her family’s 150+ year old cactus in response to a news article about a 145 year old cactus owned by a family in Bozeman, Montana.
“Christmas Cactus” is a deceptive popular name. These plants are not drought-resistant, sun-loving cactus. Due to their native habitat of the treetops of Brazil’s coastal mountain ranges, they want bright, filtered sunlight and regular watering to prevent their potting soil from drying up altogether. They thrive in pots, which makes them much simpler to care for since they don’t need to be replanted.
They should be cared for like a houseplant once the blossoms have faded. They should be watered frequently and should be in bright light but not direct sunlight. If their pots are put in dappled shade, they are watered frequently, and they are taken inside before nightly lows of 50 degrees Fahrenheit, they can be cultivated outside during the summer. You may have a healthy, happy plant by fertilizing it once a year in late spring or early summer.
How to get Christmas Cactus to bloom again after the first year is the most typical query people have about them. Cooler temperatures and extended nights are necessary for blooms. Because they are short-day plants, these cacti bloom when it is a long, cool, dark night. For between 3 and 6 weeks, they require between 14 and 16 hours of nonstop darkness and 8 hours of daylight to form flower buds. You can either choose a room in your home that is rarely used at night and install them near a window, or cover streetlights and interior lights each night to maintain their required darkness cycle. It will be much better if the room’s temps are a little lower. Their preferred overnight temperature ranges from 50 to 68 degrees. You can return the plant to its original location in your house as flower buds start to form along the leaf edges so you can enjoy the blossoms.
Be cautious while including them in drafts. Bud decline may result from drafts. A few buds falling off is typical, but if the plant loses all of its buds at once due to a draft, you’re out of luck for another year.
You may get a lovely, free leaflet about the maintenance and growth of Holiday Cactus from Reiman Gardens at Iowa State University here.
Why doesn’t my Christmas cactus bloom?
Due to its short day length, the Christmas cactus cannot blossom due to drought stress or excessive light exposure. Christmas cacti are adapted to wet, frequently rainy jungles. If the conditions are dry or there are too many hours of sunshine during bloom production, it does not flower.
I’ve listed here a few other reasons that can stop the Christmas cactus (Schlumbergera) from flowering:
Continue reading to learn why your Christmas cactus isn’t blossoming and the finest methods for putting remedies in place so that it can produce blossoms.
How can a cactus be made to bloom?
How do I get my houseplant cactus to bloom? When I bought it, it was in bloom, but it hasn’t since. -Beth
Because we can’t supply as much light as a sun-drenched desert, it can be difficult to encourage desert cacti (the spiky sort) to bloom indoors. Two more critical elements for blooming are light and:
Age: Some plants mature over several years. Purchasing an already-blooming plant is the greatest method to verify this, as you did.
Dormancy: In response to a chilly, dry, dormant phase, many desert cacti blossom. You should transfer your cactus to a cooler location with plenty of sunlight during the winter, around 50 degrees Fahrenheit, and restrict watering to just once a month—enough to prevent the plant from shriveling up.
Additionally, bear in mind these pointers for year-round cactus maintenance:
Cacti thrive indoors best on a south-facing windowsill or in a sunroom. They will receive the most sunlight, and in the winter, the air around windows is typically colder than that inside a room.
Your cactus need the most light and warmth throughout the growing season (spring and summer). Put your plant in full sun and rotate it so that it receives even illumination.
During the growing season, more water will be required. Before giving the plant a good watering till the water flows out the bottom, let the top two inches of soil dry off (empty the drainage tray). Never leave your plant in moist soil; instead, picture a brief desert downpour that quickly dries in the sun.
Use a cactus-specific fertilizer or a very diluted fertilizer that is lower in nitrogen and higher in phosphate and potassium to fertilize cacti only in the spring and early summer. Your cactus won’t blossom if you feed it too much!
Use a potting mixture made for cacti and succulents to repot your cactus. After repotting, give your cactus a week without watering.
How often does the Christmas cactus bloom each year?
Whichever one you have, it’s possible for them to bloom more than once a year. For Your Reference, Here Are A Few Of Our General Houseplant Guides: Watering Indoor Plants: A Guide. Beginner’s Guide To Plant Repotting.
Does Christmas cactus benefit from Epsom salt?
The winter solstice, which occurs on December 21 in the Northern Hemisphere, is the day and night with the shortest lengths of the year.
Christmas cacti, poinsettias, kalanchoes, and chrysanthemums are a few common plants that people give as gifts during the holidays. Their flowering is perfectly timed for the shorter days that we enjoy during this season.
The development of flower buds in many plants is influenced by how much light the plants receive. “Photoperiodism” refers to a plant’s response to the length of the day. While some plants flower as the days get shorter, others do so as the days become longer. Some plants are neutral, meaning that day length has no direct impact on flowering.
Brazilian Christmas cacti are common indoor plants that come in a wide range of hues, including red, rose, purple, lavender, peach, orange, cream, and white. In shaded rain forests, these plants thrive as epiphytes among tree branches, and their cascading stems make them an excellent choice for hanging baskets. If the plants are managed at a temperature of 68 degrees Fahrenheit, flowering can last seven to eight weeks.
During this time of year, customers frequently phone the University of Georgia Cooperative Extension office upset because their Christmas cacti or other short-day indoor plants did not bloom. They are frequently shocked to discover that if these plants are kept indoors year-round, the artificial light in the home can interfere with their natural cycle of exposure to sunshine. In order to simulate natural daylight exposure with shorter days, it becomes a difficulty.
One option is to put these plants near a window in a room that receives only natural light, turning off the artificial lighting at night. A different choice is to keep these plants outside as long as you can in the fall and then bring them inside just before the risk of freezing weather. In the Atlanta region, this typically means keeping the majority of tropical indoor plants outside until close to the end of October. Short-day plants are already set to begin flowering during the approaching holidays at this point.
On his porch, my grandfather used to keep a Christmas cactus all summer long in a hanging basket before taking it inside just before the first freeze each year. It was a large plant that would blossom in large numbers between Thanksgiving and Christmas. He maintained this plant for almost ten years, and it gave him a lot of Christmas delight.
A Christmas cactus has the advantage of not losing leaves like poinsettias or other houseplants, which is one of its many advantages. Because Christmas cactus lack genuine leaves, photosynthesis takes place inside the green stem segments known as phylloclades. To encourage branching terminals for more flowers, pinch back the stems in the first few weeks of June. You can also utilize stem portions with three to five segments to root new plants.
Temperature control and photoperiod (control of day and night length) control are key factors in the fall flower bud formation of Christmas cacti. Before flower buds will set, each night must have at least 14 hours of nonstop darkness.
For a full bud set, long nights must begin around the middle of September and last for at least six weeks. Be aware that even two hours of intermittent lighting can prevent flower buds from setting. Typically, buds will appear in approximately four weeks. Once the buds are set, the photoperiod has little impact on flowering.
Christmas cacti may live in dry, marginally submerged environments in the spring and summer. Avoid letting the soil become soggy, especially during the lengthy winter evenings. To stop flower buds from dropping off after bud set in the fall, the soil must be kept consistently moist. In the saucer underneath the pot, never let water stand.
From the time new growth begins in late winter or early spring through the summer, fertilize plants every month using a liquid fertilizer of half strength, such as 20-20-20 with trace elements. Compared to many plants, Christmas cacti have a greater magnesium need. Epsom salts (magnesium sulfate) should be used as a fertilizer every month during the growing season; however, it should not be used the same week as conventional fertilizer. Stop fertilizing in the late summer to increase the formation of bloom buds in the fall.
Why hasn’t my cactus bloomed?
I keep a modest collection of cactus as houseplants, but none of them ever bloom. Do you know why?
Cacti are fascinating, exotic plants that abound in eccentric grandeur in landscapes and homes. If your indoor cacti aren’t flowering, there’s definitely a problem with the soil, water, lighting, temperature, or other one of these factors. Additionally, it might take some cacti species up to 50 years to reach flowering maturity! It is a good idea to choose a blooming cactus when you buy one from a garden shop or nursery so you know it is old enough to do so.
Depending on the type of cactus you are cultivating, different maintenance procedures are required. Desert and jungle/forest cactus are the two primary categories of cacti. The distinction between the two is rather straightforward: jungle/forest cacti are indigenous to tropical climates, whilst desert forms are endemic to desert settings. The general growing needs for each kind are listed here, while specific species may call for special attention.
Desert: • Soil/fertilizer: Desert cactus do best when planted in potting soil that is well-drained and designed for growing cacti. Use soil that includes elements like perlite, sand, and Supersoil added into it if you don’t have access to cacti potting mix. Only use a fertilizer made specifically for cacti during the growing season. After the growing season is finished, you must stop feeding fertilizer because the cactus need to start preparing for dormancy. For plants to be healthy and flourish, they require a time of dormancy, which normally occurs during the chilly, dry winter months. • Water: Overwatering is among the most frequent errors made by cacti gardeners. The top inch of soil should typically only be watered when it feels dry to the touch. You can reduce your watering to once a month or right before the cactus starts to shrivel during the dormant season. • Lighting: Very sunny environments are best for growing desert cactus. They require powerful, continuous light to thrive. Place them in a window that faces south or west and, if necessary, add fluorescent lighting. Keep them in an area that is consistently between 55 and 80 degrees Fahrenheit. Make sure to keep them in a colder (but still bright) environment during their winter dormancy, ideally between 50 and 55 F.
The majority of jungle/forest cacti can be grown effectively in standard, well-drained potting soil. Jungle/forest: You might add perlite to the soil for quicker drainage to increase your chances of success. During the growing season, you can use a normal fertilizer; just be careful not to feed the cacti when they are dormant. • Water: Jungle/forest cactus can typically be watered once per week. Water only when the soil seems dry to the touch throughout the winter or dormant months. You can be watering your plant too little or too frequently if it starts to shrink. By feeling the dirt, you can determine what has to be adjusted. • Lighting: Jungle/forest cacti require less sunlight than desert-adapted types and require brief periods of darkness in order to thrive. Keep them in a light environment, but make sure they get some time each day away from the sun’s rays.
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