Planting Tips

Chapter 53 Why do potted plant leaves turn yellow
During the growth period of potted flowers, the leaves often turn yellow. There are many reasons for the yellow leaves, some of which are caused by one reason, and some are caused by a combination of many reasons.In the maintenance process, it is necessary to observe carefully and analyze the reasons, so as to prevent and treat them in a targeted manner.

(1) Water yellow Yellow leaves caused by long-term excessive watering, the young leaves are dark yellow and dull, the old leaves have no obvious changes, the branches are small and yellow-green, and the new shoots are not long.Watering should be controlled, and if it is severe, you can take it out of the pot, put it in a cool place to dry the soil ball, and then put it in the pot again.

(2) Dry yellow due to lack of water or less watering causes the leaves to turn yellow or brown ends and brown edges, and the old leaves wither and fall off from bottom to top, but the new leaves generally grow normally.The amount of watering should be appropriately increased and the frequency of watering should be increased.

(3) Fertilizer yellow Due to excessive fertilization or excessive concentration, the tips of new leaves appear dry brown, and the tips of old leaves turn yellow and fall off. Generally, although the leaves are thick and shiny, most of them are uneven.Fertilization should be stopped or rinsed with water.

(4) Fertilizer-deficient yellow potted flowers are only watered without fertilization for a long time, or if they are not repotted for many years, the roots will form a ball, the topdressing fertilizer will easily leak, the plants will not get fertilizer, and the leaves will turn yellow.In addition to changing the pots in time, you can overcome this disadvantage by applying thin fertilizers frequently.

(5) Potted flowers and foliage plants that love dampness, such as Chlorophytum, evergreen, one-leaf orchid, hosta, leopard-spotted arrowroot, etc., if exposed to strong sunlight, the leaves often have yellow tips and brown edges, so put them in a shaded place There is no such disadvantage.

(6) Alkali yellow flowers that like acid soil, such as azalea, gardenia, camellia, jasmine, osmanthus, white orchid, etc., if the pot soil or water quality is alkaline, the leaves often turn from green to yellow, or even fall off.In addition to cultivation with acidic culture soil, alum fertilizer water can be applied or sprayed with 0.2% to 0.5% ferrous sulfate aqueous solution to turn the leaves green.

(7) Damp heat yellow Some flowers that are not resistant to high humidity and high temperature will cause yellow leaves due to the hot summer, poor ventilation and improper shading.For example, fuchsias and rhododendrons have this phenomenon in hot and humid environments.Pay attention to ventilation and cooling, and the pot soil should not be too wet.

(8) Albino yellow flowers are caused by long-term insufficient light, the chlorophyll in the leaves decreases, and the green leaves gradually disappear, showing albinism.The plants can be moved to a place with sufficient light to turn the albino yellow leaves into green.

(9) Low-temperature yellow In cold winter, if the indoor temperature is too low, some flowers that are afraid of cold, such as Bailan, Guangdong evergreen, poinsettia, etc., the leaves will turn yellow and even fall off.In addition, flowers that are harmed by diseases and insect pests can also cause yellow leaves and fall off.If only a few leaves turn yellow and fall off at the lower part of the plant, this is a normal phenomenon of mature and aging leaves.

(End of this chapter)