Cultivation methods and precautions for poinsettia
Today's experience sharing: cultivation methods and precautions for poinsettia, as well as the introduction of green plants and flowers related to the maintenance secrets of poinsettia. Please see the detailed introduction below.
Poinsettia is also known as the Christmas flower, because its bright red color is especially good at highlighting the Christmas atmosphere, hence the name. Poinsettia is a flower that blooms beautifully and joyfully, and many people want to cultivate it. Let's learn about the cultivation methods and precautions for poinsettia.
1. Nutrition
Poinsettia prefers loose, well-draining soil. A mixture of 3 parts garden soil, 3 parts humus, 3 parts decomposed leaf mold, and 1 part decomposed cake fertilizer, with a small amount of炉渣 ( furnace slag), can be used.
2. Watering
In spring and autumn, which are the vigorous growth periods of poinsettia, the pot should not be too dry and lack water. It is best to keep it slightly moist but not waterlogged. In the hot summer, water evaporates quickly, and when watering, you should water it when it is dry and slightly moist. Overwatering can cause root rot and yellow leaves. If yellow leaves appear, move the pot to a ventilated area, regularly loosen the soil, to increase soil permeability and prevent root rot.
3. Fertilization
Poinsettia likes fertilizer. In the absence of nutrients, the plant will become weak and the growth of branches and leaves will decrease. Therefore, it should be fertilized regularly during the growing season. You can apply a thin fertilizer 1-2 times a month, such as a small amount of nitrogen-phosphorus-potassium compound fertilizer in the pot, which can promote vigorous growth of the plant. In autumn, to make it bloom earlier, you can supplement more phosphorus and potassium, such as using a 1:1000 dilution of monopotassium phosphate solution to spray on the leaves, which can promote the plant to differentiate flower buds and bloom.
4. Pruning and pinching
In the spring, when poinsettia is growing vigorously, pinch the top to encourage more branching and increase the number of flowers. Regular pruning and shaping should also be done to remove withered branches and leaves, increasing ventilation and light penetration. After autumn, avoid major pruning, and wait until the end of the blooming period to prune the remaining flowers and supplement nutrients.
5. Temperature and light
Poinsettia prefers warmth and dislikes cold. Therefore, it can be moved indoors in the last ten days of September each year, and ensure good ventilation. Poinsettia is a plant that likes light and has strong phototropism, so it should receive sufficient light throughout the year. To advance or delay blooming, you can control the light, generally providing 8 to 9 hours of light per day, and it can bloom in 40 days.
6. Pest and disease control
Poinsettia is commonly affected by whiteflies, which can be controlled by spraying or watering with insecticides. Using the phototropism of whiteflies, you can place yellow sticky traps coated with oil in the greenhouse to trap and kill them. It is also important to note that whiteflies generally absorb sap from the back of young leaves, and light-colored leaves are more susceptible to whitefly damage.
Some people believe that poinsettia is toxic throughout, with the white sap in the stems and leaves stimulating the skin, possibly causing redness and swelling, and causing allergic reactions. If ingested, it can lead to vomiting, abdominal pain, and even the risk of death from poisoning. However, it has been proven that poinsettia is non-toxic, so everyone can purchase it without concern.
The above is a detailed introduction to the cultivation methods and precautions for poinsettia and related maintenance secrets, have you learned it?