what does it mean when an orchid's leaf is yellow around the leaf edge
Let's turn our attention to leaves that are not old and not on the bottom of the plant but newer leaves on the orchid. Some of the other reasons include: 1. Bacterial or fungal disease 2. Too much light 3. Bacterial or fungal disease on orchid leaves will show itself as irregular yellow spots on the leaf. In other words it will not involve the whole leaf but just spots on the orchid leaf. If there is a black growing edge to the yellow spotting then this is caused by a fungus.