What to do if the leaves of Chunlan turn yellow

There are many different ways for spring orchid leaves to turn yellow, including differences between old leaves and new leaves, different locations of yellowing, different colors and shapes of spots ... These are all caused by different reasons.

Analysis of the reasons for the yellowing of spring orchid leaves

1. The leaves are yellowing but the growth is normal: the light is too strong.

2. The leaves turn yellow and the new shoots are smaller: excessive light, lack of nitrogen fertilizer and necessary humidity.

3. Old leaves turn yellow and fall off: caused by normal aging or repotting.

4. Old leaves turn yellow and fall off quickly: watering too much or too frequently, or improper repotting.

5. The tips of new leaves are burnt: excessive fertilization and unclean planting materials.

6. The tips of new leaves and old plants are burnt and black: the pot is too humid and hot, and there are rotten roots in the root system.

7. The new sprouts stop growing after emerging from the soil: there are rotten roots or unclean things next to the new sprouts. Turn over the growing materials around the new sprouts, remove the unclean things and the growth will resume.

8. There are burnt spots on the leaves with no yellow around the edges: sun burn spots.

9. The leaf tips are scalded and shrunken: the water temperature is too high; the air temperature is too high when watering; there is a shower during the high temperature in summer, etc.

10. New buds rot: After water is poured into the bud center, the water cannot evaporate or be absorbed, and the growing materials in the pot are not clean, resulting in leaf rot.

11. There are spots on the leaves with water-soaked edges: Excessive humidity, pot humidity and air humidity combine to cause suffocation, and are accompanied by leaf rot bacteria. Poor ventilation and aeration.

12. Brown spots on leaves: caused by heat at the roots.

13. There are irregular yellow spots on the leaves, and the mesophyll tissue is necrotic and sunken: it is caused by the viral disease also known as "Barras".

14. Small yellow spots on leaves: caused by beetles.

15. Purple-black color appears on the leaves, while the back of the leaves remains green: caused by low temperature frost. Phosphorus deficiency can also occur.

16. Leaves are dehydrated and pseudobulbs are shrunken: This is caused by long-term dryness and dehydration in the pot.