There are several reasons for the yellowing of lemon leaves: iron deficiency, lack of elements, yellow flowers, malnutrition, root rot and insect pests. How to solve these problems? The following small series will introduce the common causes and solutions of potted lemon leaves.
Lemon tree leaves yellowing lemon tree leaves yellowing analysis and treatment methods: 1. Iron deficiency and element deficiency yellow flowers lead to lemon tree leaves yellowing: element deficiency yellow flowers, such as yellowing of mesophyll into symptoms of nitrogen deficiency and yellowing of leaf vein into iron deficiency. 2.
Solution: Supplement fertilizer containing yellow flower or iron.
2. Malnutrition causes the leaves of lemon trees to turn yellow: after flowering, the leaves turn yellow and fall off.
Solution: if the leaves turn yellow due to malnutrition, potassium dihydrogen phosphate can be sprayed. In addition to nitrogen, phosphorus and potassium, this fertilizer also contains a large number of trace elements. Usage: spray 0.3% on the leaves, and apply soil in the basin once a half month in the growing season..
3. Root rot causes the leaves of lemon trees to turn yellow: the bark rots and smells of lees.
Solution: root rot is often caused by too much water in the basin or too thick fertilization. The diseased part and a small part of healthy tissue can be scraped off with a sharp knife. Apply 100 times of Royal copper and 200-300 times of tobuzin at the scraping mouth, and cover the soil after the wound heals.
4. Yellow leaves of lemon trees caused by pests: pests visible to the naked eye.
Solution: remove insects manually, or spray corresponding chemicals.
Lemon tree lemon tree maintenance experience: 1. After lemon blossoms, in addition to applying thin fertilizer once a week, flower and fruit thinning must also be carried out. When the flowers are not in bloom, part of the flower buds shall be spared first; After flower withering and fruit setting, in order to reduce nutrient consumption, some young fruits in improper positions shall be spared.
2. During the fruit growth period, if the fertilizer and water are sufficient and the plant nutrition is good, some branches will sprout new shoots, and the growth of new shoots will divert some nutrition and affect the growth of fruits. In order to keep the fruit, the new shoots should be wiped out in time.
3. When the fruit is yellow, stop fertilization and reduce watering to keep the soil moist and slightly dry. If we continue to give too much fertilizer and water, the fruits will mature and fall early, and the viewing time will be shortened.
4. Lemon likes fertilizer, and should apply more thin fertilizer at ordinary times. The plant is applied with rotten liquid fertilizer before germination, and then with liquid fertilizer dominated by nitrogen fertilizer every 7 ~ 10 days to promote long branches and leaves and multiple spring shoots.
5. Every time after picking the heart, fertilize in time to promote the branches to mature early. During the growth of lemon, you can sprinkle some cake fertilizer on the basin surface, so that some fertilizer seeps into the soil every time you water, so as to enhance the fertility. After autumn, fertilization is reduced to avoid excessive plant nutrition, promote autumn shoots, and compete with fruits for nutrients, resulting in fruit drop.
6. Potted lemon has very limited nutrient supply due to less pot soil. After many years, due to the lack of soil fertility, lemon will weaken year by year, bloom less and bear little fruit. In order to keep lemon blooming and bearing fruit every year, we must turn the pot.
7. The best time to turn the basin is half a month before the lemon sprouts. After turning the basin, place it in a ventilated and semi shady place, and put it back in place a week later for daily management.