Peony is the national flower of China. It is often appreciated by people in ancient times and is one of the materials for poetry. And the peony flowers are gorgeous and big, very beautiful and generous. The peony flower has been hailed as the king of flowers, with rich cultural and painting works. Next, I would like to introduce the situation and solutions of the yellow leaves of peony flowers to you, hoping to give you a lot of help.
Cause analysis and treatment methods: 1. Too much water causes the leaves of peony to turn yellow (watery yellow): it is caused by too much water, which is characterized by no obvious changes in the old leaves and yellow changes in the young leaves.
Solution: control water immediately and add water properly.
2. Long term water shortage causes the leaves of peony to turn yellow (dry yellow): it is caused by water shortage and drought. Its characteristics are that the old leaves turn yellow first from bottom to top. If the water shortage lasts a little longer, the whole plant will turn yellow, or even die.
Solution: water in time.
3. Soil alkalinity causes the leaves of peony to turn yellow: if peony grows in alkaline soil, the leaves will also turn green and yellow. The symptoms began from the new vein, but the vein, especially the main vein, remained green, and the phenomenon of alternating yellow and green was very obvious. With the aggravation of the degree of yellowing, the veins of the leaves gradually lose their green color, and then the whole leaves turn white, the edges of the leaves are scorched and the leaves fall off. When it is serious, the shoot will wither and the whole plant will die.
Solution: for this "yellowing" phenomenon, 0.2% to 0.3% ferrous sulfate solution can be used to spray on the leaf surface for 3 to 5 times, the concentration should not be too large, and should be used along with the preparation.
4. Too much fertilization of peony results in yellowing (yellowing): it is caused by too much fertilization or too high concentration; it is characterized by thick, shiny and uneven young leaves.
Solution: we should control fertilizer, plough and water.
5. Peony leaves turn yellow due to long-term lack of fertilizer (lack of fertilizer yellow): it is caused by insufficient fertilizer, low fertilization concentration, and long fertilization interval; it is characterized by yellow at the young leaves and young stems. If this phenomenon is seen and fertilization is not carried out in time, it will also cause yellow leaves or even death of the whole plant.
Solution: for the flowers lacking in fertilizer, do not apply a large amount of concentrated fertilizer at one time to avoid burning roots.
6. Rotten roots cause the leaves of peony to turn yellow: most of the cultivation areas of peony are years of continuous cropping, in which there are many pathogens, especially Fusarium in fungi, causing the root and stem base of peony to rot, so the ability of absorbing water and fertilizer is weakened, causing the lower leaves to gradually turn yellow and fall off or scorch, while the top center of new shoots and the color of new leaves of peony are still normal. This is the yellow leaf symptom of peony root rot during drought.
Solution: keep the permeability of soil and take drainage measures.
7. Diseases and insect pests cause the leaves of peony to turn yellow: peony is often harmed by grubs, mole crickets and other underground pests and nematodes. The leaves lose their green and turn to earthy yellow, even withered and scorched. The main characteristics of this symptom are yellowing and scorching of single or several leaves in a certain place.
Solution: if you find this symptom, you should check it in time and apply medicine quickly to control underground pests.
To keep a single peony and peony for maintenance: 1. Precautions: to raise peony at home, it must be put in a place with direct sunlight and good ventilation.
2. Fertilization experience: the base fertilizer should be sufficient, and compost and cake fertilizer should be applied when planting. Manure. Cover the fertilizer with soil. Topdressing should be controlled. Topdressing can be carried out once after flowering in spring. The fertilizer must be rotten and not too thick. No topdressing in summer. Winter fertilizer is the most important fertilizer, which should be combined with soil cultivation. The new tree peony should not be applied with thick fertilizer, especially the thick dung, otherwise the fleshy root will become moldy and rotten. The main source of nutrients is base fertilizer. Although it is in the growing season after flowering, it is still not suitable to apply liquid fertilizer. After one year of planting, it is also necessary to apply solid base fertilizer in winter.