The Christmas Cactus (Schlumbergera) is one of my favorite plants for several reasons: it’s beautiful, it blooms during the holiday season when most other plants aren’t, and it blooms year after year for decades. It’s no surprise, however, that the sight of a Christmas Cactus shedding leaves will be alarming.
Overwatering or conditions that result in damp soil are the most prevalent causes of a Christmas Cactus loosing leaves. This results in root rot and other damage to the plant. Leaf drop can also be caused by poor drainage, temperature stress, overfertilization, lighting issues, or pests.
Why are the stems of my Christmas cactus falling off?
Temperature – Excessive heat or cold may be to blame for the loss of Christmas cactus leaves. The Christmas cactus does not like it when it gets too chilly. In general, the plant enjoys temperatures of 70 to 80 degrees Fahrenheit (21-27 degrees Celsius) in the spring and summer, and slightly cooler temperatures in the fall and winter. Allow temperatures to not exceed 90 degrees Fahrenheit (32 C.).
While the plant is developing buds, cooler temperatures are good, but never below 50 degrees Fahrenheit (10 C.). Protect the plant from drafty windows and heat sources such as fireplaces or vents by avoiding rapid temperature swings.
If you’ve recently purchased a Christmas cactus or have relocated it from its summer home, it’s likely going through a significant change in surroundings. It’s possible that the shock of the change will cause it to drop a few leaves, but there’s nothing you can do about it.
Light – Christmas cactus thrives in bright, indirect sunshine and can be damaged by direct sunlight, especially in the summer.
A Christmas cactus losing leaves has the advantage of being extremely easy to propagate. The “leaves” we call “leaves” are actually segmented branches. If your dropped branch appears to be healthy, consider planting it in a new pot; chances are it will take root and grow into a new plant.
Why are parts of my cactus falling off?
Spines are found on most cacti, and their presence might indicate how healthy your cacti are. If your cactus is losing its spikes or leaves, it will lose its ornamental appeal and, depending on the cause, may even die. In this post, you’ll learn why your cactus is losing its spines (thorns) or leaves, how to halt it, and how to encourage your cactus to produce new spines.
Pests (particularly mealybug), lack of nutrients, and fertilization are a few of the most common reasons for a cactus losing its spines or leaves. Overwatering, a lack of sunlight, and burns are some of the less prevalent causes.
How can you tell if a Christmas cactus is overwatered?
Although sagging, limp leaves and stems that are mushy at the bottom are strong indicators of overwatering and root rot, the only way to know for sure is to examine the plant’s roots.
How do you know when a Christmas cactus is dying?
A wilted, limp, drooping Christmas cactus with root rot will show wilted, limp, sagging growth, but an examination of the roots will reveal the truth.
Remove the plant from its pot with care. The roots of a rot-affected cactus will be dark at the tips. The decaying Christmas cactus roots will be sticky with black or brown decomposition, depending on the severity of the disease.
If you see that your Christmas cactus is rotting, you must act quickly. Rot is a fatal disease, and the only way to save the plant once it has progressed is to discard it and start over. You can generate a new plant using a leaf from a healthy area of the plant.
How often should I water my Christmas cactus?
- Water every two to three weeks, but only until the top one-third of the soil feels dry to the touch. Water when the top 2 inches of soil feel dry, for example, if the plant is in 6 inches of soil. (Check with your finger!)
- Soak the soil until water runs through the drainage holes in the pot when it is suitably dry. To catch the water, place a tray underneath the pot. Remove any extra water from the tray after 10-15 minutes so that the pot does not sit in water.
- Feed every two weeks with a balanced houseplant fertilizer from spring through early fall. Feed the cactus once a month in the fall and winter to encourage blooming.
- Late in the spring, prune plants to encourage branching and more flowers. Simply cut a few portions off each stem, and the plant will branch out from the wound.
- Place the cut pieces in a gently wet potting soil if desired; they will root easily after a few weeks and make great Christmas gifts!
How to Get Your Christmas Cactus to Bloom
The lower temperatures and longer evenings of autumn bring out the blooms of Christmas cacti and its relatives. This is the general blooming schedule for the three main species of Christmas cacti:
- Thanksgiving cactus are the earliest and most persistent bloomers, blooming from late October to mid-winter.
It’s possible that your cactus isn’t flowering because it’s getting too much sunshine or being exposed to too hot temperatures. Here are some pointers to help you get yours to bloom!
- For at least six weeks, nights must be at least 14 hours long and days must be between 8 and 10 hours. If you have powerful interior lighting that is turned on at night, you may need to cover your cactus or transfer it to a location where it can be exposed to natural light.
- Flower buds form best when the plant is kept between 50 and 60 degrees Fahrenheit (10 and 15 degrees Celsius).
- By exposing the plant to temperatures of around 45°F (7°C) for several nights in a row, you can jumpstart the budding process.
- Ensure that you water the plant on a regular basis when it is in bloom. If the plant dries out too much, the buds may fall off.
- Don’t worry if the cactus loses its buds throughout the winter; it will bloom the next year!
Why is my cactus drooping?
Your cactus plant may be stressed if its branches are drooping or sagging. Insufficient water or sunlight, freezing damage, or mealy bugs can all stress your cactus and cause it to sag.
What does an overwatered cactus look like?
When it comes to cacti plants, the most common issue that gardeners face is overwatering. However, as we indicated in the introduction, this may come at a high cost that is difficult to bear. So, what are some of the risks associated with overwatering a cactus plant?
Loss of color
The majority of cacti plants have various shades of green, ranging from lighter lime hues to deep virid shades.
An overwatered cactus, on the other hand, will appear pale and uninteresting. The discoloration normally occurs gradually, to the point where you may not notice any substantial difference between the plant’s original and current hue.
Chlorosis, which happens as a result of overwatering, causes the green hue to fade over time. Chlorosis is the loss of the green pigment in the plant, which can cause stunted growth and poor flowering.
Keep in mind that if the potting mix contains too much water, the plant will be unable to absorb nutrients adequately. As a result, your cactus will cease to thrive due to a lack of critical nutrients.
Soggy and droopy plant
Overwatering can cause plants to become soggy and droopy as a result of too much moisture. If the stem of your plant feels soft and mushy when you touch it, you should be concerned.
The softness and mushiness is caused by the stem cells being overburdened with water molecules, causing them to bulge outwards.
The plant’s tissues begin to bulge and eventually explode as the pressure develops. The plant’s internal transportation mechanism is distorted as a result of the tissues bursting, and it is no longer able to transfer water and nutrients to other areas.
Different sections of the plant begin to droop and fall off one by one over time. The entire plant may tumble over in huge cacti species like the Saguaro because it can no longer maintain its weight.
Root rot & death
Decomposition is inevitable when a cactus plant is exposed to too much moisture. Root rot is caused by a saturated soil that prevents air from reaching the roots.
In the majority of cases, rotting begins at the root tips and spreads to the base of the plant. Because root rot occurs beneath the surface, it is often difficult to detect the problem until it is too late.
Your plant will grow stunted as the rot progresses, and portions of the stem may fall off when touched. The cactus will then begin to turn black, and if nothing is done to save it, it will eventually die.
How do you rejuvenate a Christmas cactus?
Repot the Christmas cactus into fresh soil when it is extremely limp and the soil is moist. Remove the wilting Christmas cactus from its pot and gently scrape away as much soil as you can. Make your own repotting soil to avoid future Christmas cactus issues. Use two parts potting soil to one part sand or vermiculite in a top grade potting soil to ensure sharp drainage.
What does Underwatered Christmas cactus look like?
The health of any cactus that has been let to sit in a saucer full of water is likely to suffer. A Christmas cactus plant that has been overwatered will display evident indications of discomfort. If the saucer hasn’t dried in one day, dump the extra water to avoid moisture gnats and root damage.
If you don’t remember to water your Christmas cactus, one of the first signs of overwatering is limp leaves that begin to fall off. The stems and branches will soften and become mushy as a result. In severe situations, the stem will rot entirely off and emit a horrible stench.
It’s easy to avoid. To avoid over-watering your Christmas cactus, use a soil meter.
How do I fix an overwatered Christmas cactus?
How can I revive a Christmas cactus that has been overwatered?
- Eradicate the roots from the pot and cut away any rotten roots, then wash the remaining roots to remove any fungus.
- Leave the plant in a warm, well-ventilated room overnight to allow the roots to dry out.