What to Do When Potted Osmanthus Leaves Turn Yellow? Find the Cause, Cut the Dead Leaves, and Spray

Growing Techniques Jan 1, 1970 0 views

When it comes to osmanthus, it is surely familiar to everyone. Its unique fragrance is deeply loved by people, and it is one of the favorite flowers in most people's hearts. With advances in potting techniques, osmanthus can now be grown at home too. When growing osmanthus at home, the most common problem is yellowing leaves.

1. What to Do When Osmanthus Leaves Turn Yellow: Remove the Yellow Leaves and Treat the Root Cause

Osmanthus is a very easy plant and flower to grow. Earlier we discussed how to grow osmanthus and the benefits and effects of osmanthus. Now let us look again at what to do when osmanthus leaves turn yellow. There are many causes of yellowing osmanthus leaves. Overwatering or underwatering can both lead to yellow leaves. Exposure to strong sunlight can also cause yellow leaves. Below we will analyze them one by one.

2. Causes of Yellowing Osmanthus Leaves

1. Too much water

When the potting soil is waterlogged and wet for a long time, it causes a lack of oxygen in the soil, leading to rot of some fibrous roots. As a result, the ability to absorb water and nutrients weakens, causing young leaves to turn pale yellow, and the flower leaves also gradually turn dark yellow one after another. In this situation, what should you do when osmanthus leaves turn yellow? Let us look at the solutions.

Solution: After noticing this, immediately control watering, stop fertilizing, and loosen the soil frequently so the potting soil can breathe well. In severe cases, the entire root ball needs to be taken out of the pot and placed in a pile of dry soil so the water can quickly seep out. Once the drooping branches and leaves recover, replant it in the pot.

2. Long-term lack of water

Watering too little, or watering only halfway or missing waterings for a long time, causes the leaves to lose water through evaporation faster than they can absorb it, creating a water shortage and also causing leaves to turn yellow. "Drought yellowing" starts from the lower leaves and gradually moves upward, turning yellow, scorched, and falling off. In severe cases, the petioles droop and appear wilted.

Solution: Immediately move the flowerpot to a cool place, spray some water on the leaf surfaces, and water lightly. Later, as the stems and leaves gradually recover and stand upright, gradually increase the amount of watering. If too much water is given suddenly at this point, it may cause plasmolysis, damage the protoplasm, and cause the plant to die.

3. Strong sunlight exposure

In summer, placing flowers that prefer semi-shade and fear high heat and strong light in direct strong sunlight makes it very easy to cause young leaf buds or leaf edges to scorch, or the entire leaf to turn yellow. In this situation, what should you do when osmanthus leaves turn yellow? Let us look below.

Solution: Immediately move it to a cool, well-ventilated place to grow.

4. Too much fertilizer

Applying too much fertilizer, especially too much nitrogen fertilizer while lacking phosphorus and potassium fertilizer, easily causes leaves to turn yellow. It shows as new leaves being thick and fleshy, with most leaf surfaces uneven, while old leaves gradually turn yellow and fall off. In severe cases, leaf tips dry up, and even entire leaves become scorched yellow. If your osmanthus leaves show these symptoms, excessive fertilization is certainly the cause of the yellowing osmanthus leaves.

Solution: When this happens, immediately stop fertilizing and increase watering so the fertilizer flows out through the drainage holes, or immediately repot, remove part of the old soil, rinse the root ball with water, replace part of it with fresh potting soil, and replant the plant in the pot.

5. Pests and diseases

In potted osmanthus, the main pests are locusts and red spider mites, as well as white grubs. Locusts feed on tender shoots and new leaves in summer and autumn, very easily causing many leaves to become damaged, affecting the appearance and growth of the potted flower.

Solution: You can choose 4.5% beta-cypermethrin emulsifiable concentrate at 2000 to 3000 times dilution or 40% chlorpyrifos emulsifiable concentrate at 1000 times dilution for spraying.

3. Tips for Caring for Osmanthus

1. In spring, as the temperature gradually rises, gradually open the balcony windows so the temperature inside the balcony slowly adapts to the outdoor temperature. Once the average temperature reaches above 0°C, all the balcony windows can be opened. Be careful not to open the windows too hastily, so as not to harm the osmanthus. In summer, preventing dryness is an important part of osmanthus care. If the balcony air is hot and dry with poor ventilation, it is very unfavorable for the growth and development of osmanthus. People should open the balcony doors and windows as much as possible to maintain air circulation.

2. At the same time, increase air humidity. You can lay a layer of bricks or water-absorbing mats such as cattail mats on the balcony floor, place the osmanthus on top, and frequently splash water on the mats so they fully absorb water. Relying on the natural evaporation of water creates a humid environment for the osmanthus. In addition, in the hot summer, spray water on the branches and leaves of the osmanthus at any time. This can lower the temperature of the osmanthus plant, wash dust off the osmanthus leaves, and also meet the osmanthus's demand for moisture. The above covers the causes of yellowing osmanthus leaves and what to do when osmanthus leaves turn yellow. We hope it can help you.

What to Do When Potted Orchid Leaves Turn Yellow: Causes of Yellowing Orchid Leaves / Sun Scorch

1. What to Do When Orchid Leaves Turn Yellow: Cut the Diseased Leaves

Orchids are a very easy flower to grow, but if the growing method is wrong, it can lead to yellowing and withering leaves. There are many causes of yellowing orchid leaves. Improper watering, insufficient light, and so on can all lead to yellowing orchid leaves. What should you do when orchid leaves turn yellow? Regardless of which cause it is, we should first cut off the yellowing leaves.

2. Causes of Yellowing Orchid Leaves and Solutions

1. Light

Orchids have relatively strict light requirements. They like a more shaded growing environment, are rather afraid of strong sun but cannot lack sunlight. Therefore, whether light is insufficient or too strong, the growth of orchids will be affected. With strong light, sunscald easily occurs, causing orchid leaves to be damaged and turn yellow. With weak light, the orchid plant does not get enough nutrients and the leaves easily turn yellow. This is the cause of yellowing leaves in most orchids.

Solution: Orchids like semi-shade. Apart from full-sun care in early spring and winter, at other times place the plant in a well-ventilated spot and avoid direct sunlight.

2. Watering

Orchids like a moist growing environment and have relatively high requirements for air humidity. When watering is insufficient and the root system is damaged, or when the air is too dry, orchid leaves will turn yellow. Conversely, if too much water is given, water accumulates in the pot and drainage is poor, causing the orchid roots to lack oxygen and rot, resulting in yellow leaves and even death.

Solution: Master the technique of watering. Water according to the dryness of the potting soil, watering appropriately and at the right time. Avoid the potting soil becoming too dry or too wet. Pay attention to the air humidity of the orchid's growing environment. If the air is too dry, spray water frequently to maintain humidity.

3. Normal yellowing

The growth of orchids requires the replacement of old and new parts as the plant grows. Because of the need to develop new leaves, old leaves will not continue to grow, but instead turn yellow, wither, and fall off. In this situation, what should you do when orchid leaves turn yellow? This is leaf yellowing caused by metabolism and is a normal phenomenon, so there is no need to worry too much.

4. Pests and diseases

If orchids suffer from pests and diseases, leaf yellowing can also occur, such as leaf spot disease and anthracnose. Root rot can also cause leaf yellowing, and may even be more harmful. This is also a common cause of yellowing orchid leaves.

Solution: Generally, when orchids develop pests or diseases, the effect on the leaves is a gradual process. In the early stages of pests or diseases, if they can be discovered in time, countermeasures can be taken. Based on the symptoms shown by the orchid, determine which pest or disease the orchid has encountered, and choose the corresponding treatment measures. Spraying pesticide or using manual control will alleviate the yellowing of orchid leaves.

5. Fertilizing

If orchid leaf yellowing is caused by fertilizing, it is generally because too much fertilizer was applied at one time, causing the orchid's roots and stems to be burned and the leaves to turn yellow. Because orchid growth actually does not require heavy fertilizer, fertilization should be light and frequent.

Solution: In terms of fertilizing orchids, apply thin fertilizer skillfully. Never apply concentrated fertilizer, heavy fertilizer, or undecomposed liquid fertilizer. On the second day after fertilizing, water once with clean water to dilute the fertilizer and avoid fertilizer damage. The above covers what to do when orchid leaves turn yellow, the causes of yellowing orchid leaves, and the solutions. We hope it can help everyone.

What to Do When Lotus Leaves Turn Yellow and Dry Up: What Causes Lotus Yellowing (Cut Dead Leaves and Spray)

Lotus is also called the lotus flower and is one of China's top ten famous flowers. In nature, any plant can "get sick," and yellowing and drying lotus leaves are among its symptoms. So what should you do when lotus leaves turn yellow and dry up? First we need to find its symptoms, then treat the root cause. Below, let us take a look at what causes lotus yellowing.

1. What Causes Lotus Yellowing: Light and Temperature

Since ancient times, lotus has been deeply loved by people. Earlier we discussed how to grow lotus and the benefits and effects of lotus. Now let us discuss a common problem: what to do when lotus leaves turn yellow and dry up, and what causes lotus yellowing. There are many causes of yellowing lotus leaves: it may be caused by strong light, or improper fertilizing, or temperatures that are too low, and so on. Below we will explain the solutions one by one.

2. What to Do When Lotus Leaves Turn Yellow and Dry Up: Treat the Root Cause

1. Insufficient light

Lotus is a sun-loving plant. Insufficient light can cause lotus branches and leaves to grow leggy. The leaves cannot carry out normal photosynthesis, and chlorophyll synthesis is affected, causing the leaves to turn yellow.

Solution: Make sure to give it more sun. Potted ornamental lotus must be placed in a sunny spot, not in a shady place.

2. Soil or water is strongly alkaline

Soil or water that is on the alkaline side affects the absorption of trace elements by the roots of ornamental lotus, and the symptoms of lacking elements such as iron, magnesium, and sulfur mostly appear as what we commonly call watermelon stripes.

Solution: Adding a little ferrous sulfate to the water is a good method. It can adjust the pH and also supplement iron.

3. Improper fertilizing

Both excessive fertilizer and lack of fertilizer can cause lotus leaf yellowing. For beginners growing lotus, excessive fertilizer is generally the more common cause. Yellowing from insufficient fertilizer mostly shows as young leaves becoming lighter in color, appearing yellow or pale green, while old leaves remain relatively normal or gradually turn from green to yellow. Leaf yellowing caused by a lack of nutrient elements mostly occurs during the growing period and late stage.

Solution: Too much fertilizer burns the roots. If root burning occurs, it is recommended to replant, switching to plain soil for cultivation, and at the same time spray water on the leaves more often. After digging out the seed lotus, you can observe the condition of the root system to confirm whether the judgment is correct. Roots that are partially black, short, or absent indicate root burning.

4. Freeze damage or disease

A sharp drop in temperature or too great a temperature difference can cause new leaves to turn yellow, shrink, and curl inward. Pay attention to cold protection; simply do not leave the potted lotus outdoors where the temperature is too low. Fungal diseases generally show as yellow spots of varying sizes appearing on the leaves, which gradually turn brown and necrotic. The diseased spots often have powdery or cotton-like material. You can use carbendazim, but do not abuse it, otherwise it may have the opposite effect.

Lotus is a very easy flower to grow. As long as you pay attention to its light and temperature, growing lotus well is not a problem. Through the answers above, you now know what to do when lotus leaves turn yellow and dry up, and what causes lotus yellowing.