What is the reason why the leaves of sweet-scented osmanthus trees turn yellow? How to solve it? Why can't you grow it at home?

Osmanthus fragrans is one of the top ten traditional flowers in China. Osmanthus fragrans, also known as rhinoceros, rock laurel, laurel, is an evergreen shrub or small tree of Oleaceae. There are cinnamon, silver cinnamon, cinnamon, laurel and so on. What is the reason why the leaves of sweet-scented osmanthus trees turn yellow? How to solve it? Why can't we grow sweet-scented osmanthus at home? Let me give you an answer.

First, what is the reason why the leaves of sweet-scented osmanthus trees turn yellow? How to solve it?

When many flower friends raise sweet-scented osmanthus, the leaves will always turn yellow, and some of them have found the reason themselves, but more flower friends do not know what the cause is. Next, I will sort out the reasons for the yellowing of sweet-scented osmanthus leaves and what are the solutions for your own investigation.

1. Too much watering leads to the yellowing of sweet-scented osmanthus leaves (water yellow): too much watering, the basin soil is wet for a long time, resulting in a lack of oxygen in the soil, resulting in the decay of some fibrous roots, thus weakening the ability of absorbing water and fertilizer, causing tender leaves to turn yellowish, and flowers and leaves gradually turning dark yellow.

Solution: after discovery, we should immediately control watering, stop fertilization, and often loosen the soil, so that the basin soil is well breathable. If the disease is serious, it is necessary to remove the whole land from the basin and place it in the dry soil pile to make the water seep out quickly, and then replant it into the basin after the drooping branches and leaves are restored.

2. Long-term lack of water leads to yellowing of sweet-scented osmanthus leaves: too little watering, or long-term half-cut-off or missed watering, so that the evaporation of water in leaves is greater than absorption, resulting in water supply falling short of demand and yellowing of leaves. The "dry yellow" gradually yellowed upward from the lower leaves, withered and scorched off, and when the petiole was serious, the petiole drooped and wilted.

Solution: immediately move the flowerpot to a cool place, spray some water on the leaves, and pour a small amount of water. Later, as the stems and leaves gradually return to straight and straight, and then gradually increase the amount of water, if too much water is suddenly poured at this time, it may cause cell wall separation, protoplast damage, and cause flower death.

3. Sun exposure leads to yellowing of sweet-scented osmanthus leaves: flowers that prefer semi-shade and are afraid of high temperature and heat in summer will be maintained in the place of strong light, which can easily cause tender leaf buds or leaf margin scorch or whole leaf yellowing.

Solution: immediately move it to a cool place with good ventilation for cultivation.

4. The acidity of the soil leads to the yellowing of sweet-scented osmanthus leaves (lack of light yellow): in southern China, the soil is red loam, the soil is acidic or slightly acidic, and magnesium in the soil is easy to lose. The leaves often show old leaves and the veins are green and yellowing because of magnesium deficiency. The application of calcium magnesium phosphate fertilizer evergreen will be damaged, resulting in yellowing and shedding of leaves.

Solution: therefore, 0.1% to 0.3% magnesium sulfate solution should be sprayed or sprayed after entering the room. For the improvement of acid soil, attention should be paid to the application of rotten organic fertilizer, lime and a small amount of lime, which can not only neutralize the acidity of soil, but also promote the decomposition of organic fertilizer.

5. Excessive fertilization of sweet-scented osmanthus leads to leaf yellowing (fat yellow): this fertilization is too much, especially when applying too much nitrogen fertilizer and lack of phosphorus and potassium fertilizer, it is easy to cause the leaves to turn yellow, showing that the new leaves are thick, most of the leaves are uneven, and the old leaves gradually turn yellow and fall off. When serious, the leaf tip dries up, or even the whole leaf is scorched yellow.

Solution: if you encounter this situation, you should apply fertilizer immediately, increase the amount of water, let the fertilizer flow out from the drain hole, or pour the basin immediately, remove part of the old soil, wash the soil block with water, replace part of the new culture soil, and then plant the plant back into the pot.

6. Osmanthus fragrans long-term lack of fertilizer leads to yellowing of leaves (lack of fertilizer): lack of fertilization, especially without long-term application of nitrogen fertilizer or change of soil, lack of nitrogen nutrition in the soil, resulting in thin and yellow branches and leaves.

Solution: pour the pot in time, remove the plant, replace it with a larger pot, put it into a new loose and fertile soil, and replant it. After pouring water, put the seedlings in a half-light place to slow down. After its growth resumes, thin liquid fertilizer or compound chemical fertilizer is applied.

7. Diseases and insect pests lead to yellowing of sweet-scented osmanthus leaves: this soilless potted sweet-scented osmanthus is mainly caused by locusts and red spiders, as well as grubs. Locusts feed on tender shoots and new leaves in summer and autumn, which simply form a lot of leaves that are incomplete, affecting the appearance and growth of potted flowers.

Solution: spray 4.5% cypermethrin EC 2000 to 3000 times or 40% chlorpyrifos EC 1000 times.

Second, why can't we grow sweet-scented osmanthus at home?

The inability to grow sweet-scented osmanthus is basically derived from the old saying.

There are clouds in the Yin-Yang House Classic; sweet-scented osmanthus flowers in the courtyard and ghosts outside the house. Both ancient and modern sweet-scented osmanthus trees are a sign of bad luck in the family. There are also clouds; in front of the sweet-scented osmanthus tree, dignitaries stand inside. Therefore, it is said that the number of sweet-scented osmanthus is not good for planting in the door, but if it is planted in front of the door, it is an auspicious picture, and if it is planted in the courtyard, it will lead to evil spirits to be admitted to the hospital, which is unlucky, and there will often be disputes between words and words.

Although it is a superstition, I still don't believe it if I believe it.

Sweet-scented osmanthus can be planted at home, but it depends on whether you respect superstition.

Sweet-scented osmanthus like warmth, strong resistance, not only high temperature, but also more cold-resistant. Osmanthus fragrans prefer sunshine and can tolerate shade. Under full light, its branches and leaves grow luxuriantly, bloom densely, grow sparsely in shade and flowers are sparse. If you plant potted plants indoors in the north, you should pay special attention to sufficient light to facilitate growth and flower bud formation.

The sweet-scented osmanthus planted at home had better be planted in the balcony or courtyard in a sunny position, which is beneficial to its normal growth and flowering.