First, the water is yellow. The yellow leaves caused by long-term watering show that the young leaves are yellow and dull, and the old leaves have no obvious changes. The roots are small yellow-green, and the new buds do not shrink. To control the water, you can take off the basin when it is serious, dry the soil in the shade and put it in the basin. ?

Second, drought and yellow. The leaves turn yellow because of lack of water or water. Old leaves wither and fall off from bottom to top, but new leaves generally grow normally. The amount and frequency of watering should be appropriately increased. ?

Third, fat yellow. Because of too much fertilization or too high concentration, the new leaf tip appears dry brown, and the old leaf tip also appears dry brown. The leaves are generally plump and shiny, but most of them are uneven. Should stop pouring fertilizer or rinse fertilizer with clear water. ?

Fourth, the lack of fat yellow. Potted flowers are only watered for a long time without fertilization, or the pots are not changed for many years. The roots must form a ball, and the plants can't get fertilizer, which makes the leaves yellow. In addition to changing pots in time, we should also apply thin fertilizer frequently. ?

Fifth, burn yellow. I like wet potted flowers and foliage plants, such as chlorophytum, evergreen, Eupatorium odoratum, Hosta, etc. If their leaves often have yellow tips after strong direct sunlight, they should be kept in the shade. ?

Sixth, alkali yellow. Flowers that like acidic soil, such as Rhododendron Camellia, Osmanthus fragrans and Cymbidium hybridum, often turn their leaves from green to yellow or even fall off, such as potted soil or alkaline water. In addition to using acidic nutrient soil for culture, alum is rich in water or 0. 2%-0。 Spraying 5% ferrous sulfate aqueous solution can not only change the leaves from yellow to green. ?

Seven, damp and hot yellow. Some flowers that are not resistant to high temperature and high humidity turn yellow due to hot summer, poor ventilation and improper shading. If the golden bell jar is upside down, the cuckoo has this phenomenon in a hot and humid environment. Attention should be paid to ventilation and cooling, and the pot soil should not be overheated. ?

Eight, albino yellow. Due to insufficient illumination in flowers, chlorophyll in leaves decreases, which makes the green of leaves gradually disappear, showing albinism. You can move the plants to a sunny place and let the leaves turn green slowly. ?

Nine, nine. In cold winter, if the indoor temperature is low, some flowers that are afraid of cold, such as white orchid, Guangdong evergreen and poinsettia, will turn yellow and their leaves will fall off. In addition, flowers harmed by pests and diseases will also cause yellow leaves to fall off. It is normal if a few leaves turn yellow and fall off at the lower part of the plant. ?

Kumquat management technology:?

Potted kumquat needs proper water and fertilizer management. Before the spring buds germinate, cut off some branches born last year, leave 2 ~ 3 buds for the strong ones, and leave 3 pruned 1 annual branches for each plant, which is beneficial to the germination of spring buds. When the new bud grows to 15 ~ 20 cm, pick the core to make the branches full. When the branches are uniform, apply a quick-acting phosphate fertilizer, such as calcium superphosphate, to prevent the branches and leaves from growing white and promote flower bud differentiation and flowering and fruiting. At the end of May, the spring shoots will blossom and bear fruit, and the flowering period should be appropriately thinned. After fruit setting, the fruit should be thinned according to weak trees 1 times, and 2 ~ 3 flowers per branch are appropriate. Cut off the autumn shoots in time to prevent secondary results. ?

Ornamental value: potted kumquat is evergreen all the year round, with lush foliage and beautiful tree shape. Flowers bloom in summer, the color is white and the fragrance is overflowing. In autumn and winter, the fruit is ripe or yellow or red, dotted with green leaves. It can be described as green leaf golden pill, which helps people prosper and has high ornamental value.