Why are the leaves of Phalaenopsis orchids turning yellow and what is the reason?
Today, I will explain in detail why the leaves of Phalaenopsis orchids are turning yellow and the knowledge related to flowers. Next, the editor will provide a detailed answer for you.
Why are the leaves of Phalaenopsis orchids turning yellow and what is the reason?
1. Improper temperature: Phalaenopsis orchids will turn yellow when the temperature is too high or too low, and it is necessary to control the ambient temperature around 20°C. 2. Overwatering: Phalaenopsis orchids are not tolerant to waterlogging, and it is important to water once every 1-2 weeks. 3. Excessive sunlight: Take shading measures for Phalaenopsis orchids during the summer. 4. Infected with diseases and pests: Cut off the diseased yellow leaves of Phalaenopsis orchids and spray with fungicides.
1. -- Improper temperature --
The most likely reason for yellowing leaves in Phalaenopsis orchids is improper temperature. This type of plant prefers a relatively warm environment, and the surrounding temperature should be maintained at around 20-30 degrees Celsius. It is not suitable to be too high or too low, as high temperatures can cause severe dehydration and yellowing, while low temperatures can cause frostbite and yellowing.
2. -- Improper watering and fertilizing --
During the growth and development of Phalaenopsis orchids, sufficient water and fertilizer are indispensable. However, if the plant is not kept moist but is instead in a waterlogged or dry environment, or if the thin and frequent fertilizing principle is not followed during fertilization, and raw, concentrated, or no fertilizer is used, it can lead to yellowing leaves.
3. -- Improper lighting --
Phalaenopsis orchids prefer a semi-shaded environment but also need some sunlight for photosynthesis. Therefore, they are usually provided with scattered light. However, if the plant is exposed to direct sunlight for a long time, causing leaf dehydration, or kept in the dark for a long time with insufficient chlorophyll, the leaves will turn yellow.
4. -- Infected with diseases and pests --
Phalaenopsis orchids can sometimes be infected with diseases and pests, and the leaves of infected plants will turn yellow due to the infection or the feeding and biting of pests. The main diseases and pests are red spiders and scale insects. If there is a fine web on the back of the yellow leaves, it is likely red spiders, otherwise, it might be scale insects.
The above information about why the leaves of Phalaenopsis orchids are turning yellow is for reference by green plant enthusiasts, hoping to solve your problems in green plant and flower management.