Paulownia, also known as round leaf Panax japonicus, is an evergreen shrub of Acanthopanax family. Scattered inflorescence, small white green flowers, mainly for potted plants, garden trees and hedgerows. Many flower friends also have breeding at home, but according to some flower friends, the leaves of Phlox at home are yellow, and I don't know what causes it. So, today Xiaobian and everyone together to analyze the reason why the leaves of Flos fordii turn yellow.
Cause analysis and treatment of yellow leaves of Paulownia fortunei: Paulownia fortunei is an evergreen shrub. It likes a warm, humid and sunny environment, and is resistant to semi shade, cold, drought and waterlogging. The main reasons for its yellow leaves are as follows:
1. Environmental mutation: the newly transplanted plants are easy to lose their leaves because they have not adapted to the new environment. The leaves of the round leaf Paulownia will turn yellow one by one, and the yellow leaves cannot be restored.
Solution: if it has enough water and nutrients, it will grow vigorously and quickly.
2. Excessive watering (rhubarb): the root of Phlox can adapt to dryness, but it is afraid of soaking. If it is too wet, it is easy to rot and then fall on the leaves. In this way, the leaves of Phlox will turn yellow.
Solution: put the potted plants in a place with good ventilation and light scattering. When it's cold, more water will rot, and the plants will die. Don't water it. Wait until it's dry a centimeter from the surface, just spray a little.
3. Lack of light (yellow): Paulownia fortunei is a sun loving plant. If it is maintained in shade for a long time, the leaves will turn yellow and wilt due to lack of sufficient light.
Solution: in the family, it can be placed in a bright room for a long time. If you can see several hours of sunshine indoors every day, it will grow more vigorously. However, attention should be paid to avoid direct sunlight in summer.
4. Suffer from insect damage (red spider): it mainly damages the back of the leaves, with small red or brown spots. In severe cases, it also exists on the leaf surface. It mainly sucks the juice of the plant, and the affected leaves turn yellow and fall off.
Solution: wash the whole plant with large water, or spray special insecticides such as mite net or mite control.
5. Too much fertilization or too high concentration (more fertilizer yellow), too many times or too high concentration of fertilization will easily burn the roots of plants, resulting in yellow leaves.
Solution: stop fertilization immediately and dilute the fertilizer with large water. Pay attention to flushing several times continuously. Then replace the original basin soil.
Maintenance experience of snow-white Paulownia (leaves are normal) Paulownia:
Paulownia rotundifolia is native to the Pacific Islands. It likes a warm, humid and sunny environment. It is resistant to semi shade, cold and drought. The family can be placed indoors with bright light for a long time. If you can see several hours of sunshine indoors every day, it will grow more vigorously.
In summer, pay attention to avoid direct sunlight outside. During the growth period, keep the basin soil moist without ponding. Often spray water close to the room temperature to the plants to increase the air humidity and make the leaf color fresh. Apply special fertilizer for foliage plants or rotten thin liquid fertilizer every 2 weeks or so. If it is a flower leaf variety, pay attention to that the nitrogen content in the fertilizer solution should not be too high, so as not to reduce or even disappear the patterns on the leaf surface.
After September, stop fertilization to make the new branches mature, which is conducive to overwintering. In winter, it should be placed indoors in a sunny place, properly reduce watering, and the temperature should be maintained above 12 ℃. Otherwise, a large number of leaves will fall off and even plants will die due to too low temperature. Change the basin every 2 to 3 years. The basin soil shall be loose and fertile, rich in humus and have good drainage and air permeability. Rotten leaf soil or peat soil can be added with 1 / 3 of river sand, and mixed with a small amount of rotten chicken and cow dung as base fertilizer.