Overwatering a plant contributes to the yellowing of the plant. An excess of water in the soil depletes the oxygen within the soil. Without adequate oxygen, the root system of a plant dies out, which causes the plant to turn yellow.isease. Several different plant diseases lead to various parts of plants turning yellow, most commonly the leaves. Viral diseases such as yellow mosaic cause plant leaves or flowers to turn yellow. Some fungal diseases may also cause yellowing. Rust, for instance, might cause yellow powder to form on the leaves.
Sinus Decongestion. 1  1. Unplug ears that are clogged due to a cold. 2  2. Do the Valsalva Maneuver. 3  3. Take a decongestant.  4. Use a nasal spray 1  antihistamine. 5. See a doctor.
A waxy, yellow, or reddish-brown ear discharge can also be a sign your dog has an ear infection, which can be a result of allergies, mites, polyps, overproduction of ear wax, excessive bathing or swimming (which can leave too much moisture in the ears), or other problems.