Post actualizado el día September 27, 2026 by DeiviSanzPlay
It is quite common for poinsettia owners to worry when they notice that the leaves of the plant begin to fall. <a href="https://www.chusmeando.com/flores-y-plantas/por-que-se-ponen-rojas-las-hojas-de-la-flor-de-pascua/” title=”Why do poinsettia leaves turn red?”>Why do the leaves of my poinsettia fall? This leaf drop can be caused by various factors such as environmental stress, watering problems, pests, or diseases.
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Too much or too little water: The impact on the health of the plant
One of the main reasons why poinsettia leaves fall is improper watering. Both too much and too little water can generate great stress on the plant, which causes the leaves to fall prematurely.
When the poinsettia receives too much water, the roots can rot, which interrupts the absorption of <a href="https://www.chusmeando.com/flores-y-plantas/cuales-son-los-nutrients-de-la-flor-de-jamaica/” title=”What are the nutrients of the hibiscus flower?”>nutrients and water, weakening the plant. This stress manifests through the falling of the leaves, especially the lower ones. On the other hand, if it is not watered enough, the plant dehydrates, which also causes the leaves to wilt and fall.
The key is to maintain a balance in watering. It is <a href="https://www.chusmeando.com/tramites/por-que-el-empadronamiento-es-el-tramite-mas-important-que-nadie-valora/” title=”Why is voter registration the MOST IMPORTANT procedure that nobody values?”>important to water the poinsettia only when the top layer of the substrate is dry to the touch, and to prevent water from accumulating at the bottom of the pot.
Sudden temperature changes: The environmental impact
The poinsettia is very sensitive to temperature variations. Exposing it to sudden temperature changes or cold drafts can cause its leaves to fall. If the plant is near an open window or a heat source such as a stove, it may experience thermal stress that results in its leaves falling.
The poinsettia prefers stable temperatures between 15 and 22 degrees Celsius. When the plant is subjected to lower or higher temperatures than it tolerates, its leaves begin to yellow and fall.
Lack of light: Why does it affect the leaves?
Light is another crucial factor for the health of the poinsettia. If the plant does not receive enough indirect light, its leaves can turn yellow and fall. The poinsettia needs a bright environment, but without direct sunlight, since this can burn its leaves.
If you notice that the leaves are falling in large quantities, check whether the plant is located in a suitable place. Make sure it receives enough light during the day, especially during the darkest months of winter.
Pests and diseases: Are they to blame for leaf drop?
Pests and diseases can also be responsible for the falling of poinsettia leaves. Mites, aphids, and mealybugs can attack the plant, sucking its sap and weakening it, which causes the leaves to fall.
Fungal diseases, such as downy mildew or rust, can also affect the plant, causing spots on the leaves and, finally, their fall. If you suspect a pest infestation or an infection, it is advisable to treat the plant with an appropriate insecticide or fungicide.
Fertilization stress: An excess of nutrients
Although the use of fertilizers can be beneficial for the poinsettia, over-fertilizing can also stress the plant. If the plant receives too many nutrients, especially nitrogen, the leaves can fall due to the imbalance.
It is important to fertilize the poinsettia in the recommended doses and not to do it too frequently. Use a balanced fertilizer, preferably one with a higher concentration of potassium and phosphorus, which are essential for flowering and leaf health.
