What's going on with the yellowing of geranium leaves?

Geranium is a perennial herbaceous flower with slightly Lignified stems and herbaceous branches and leaves. The flowers are colorful and beautiful, and they are liked by many people. Common ones are suitable for potted plants. The plant is relatively small and suitable for breeding on the windowsill, so it is loved by many people. After breeding geraniums, many friends make new leaves very easy to turn yellow, but I don't know what the reason is and what to do. So let's answer them one by one now.

1. Low temperature

The old leaves at the base are easy to yellowed naturally and fall off at last, which is normal. The outdoor temperature is too low, which affects the growth of the leaves, which may turn yellow and eventually fall. Therefore, it is necessary to maintain more than 10 degrees in breeding, and the temperature is at least above 9 degrees at night, so that the yellow leaves will not be damaged by freezing. Keeping it indoors is the best way to keep warm.

2. High temperature

Extremely high temperature leaves will lose water and turn yellow, anxious and dry, the high temperature is often dry, and the roots are unable to absorb water. In severe cases, the whole plant will dry up. The solution is that the high temperature should be moved indoors for maintenance, preferably in a cool, well-ventilated place. After the occurrence of yellow leaves, iron supplementation can be relieved.

2. Fertilization

Sometimes the number of topdressing is too much, the amount of fertilizer is too much, and the soil concentration is too high, which inhibits the absorption of the root system and harms the root system, which directly shows that the leaves turn yellow; but if the plant is not fertilized for a long time, the plant lacks nutrition, and the leaves cannot be supplied in the first place. The best way to fertilize is to apply fertilizer regularly, once at a stage, we have to apply fertilizer. Appropriate amount of fertilization, a small amount in summer, fertilizer to dissolve a large amount of water after use.

3. Humidity

If the planting process, high temperature and humidity, too much watering, excessive wetting, root rot, infection, poor leaf growth. Lack of water is easy to dry, as long as maintain enough water, do not water every day, about 3 to 4 days watering, so that there will not be stagnant water. If there is no stagnant water, the roots will not rot.

4. Diseases and insect pests

Infected with diseases and insect pests, some may cause leaves to turn yellow. Infected bacteria usually invade from the roots, or spread from the soil. Some bugs may be carried by the soil, or they may be recruited from the outside world. The best thing is to change the soil in time, wash the roots and containers, and disinfect the soil after sending the disease. When insect pests occur, they should be caught in time, sprayed and irrigated to the root.

The yellowing of geranium leaves is generally caused by external reasons, and of course, there is also a lack of internal nutrition. As long as the nutrition is satisfied, culture in a suitable environment. Pay attention to seasonal changes, proper protection will not be a big problem.