Yellow leaves can be an ambiguous symptom in plants. Like a fever in humans, yellowing leaves often indicate a health problem, but there are so many causes that the symptom doesn't indicate exactly ...

Q. I have a large gardenia in my front lawn. It appears to be insect-free, but the leaves are turning yellow and falling. Applications of soil acidifier and iron did not seem to help. -- B.J.S., ...

A little yellowing is normal on most plants during the growing season. When deciduous leaves turn yellow in autumn, the slowing down of the production of chlorophyll -- the green pigment plant cells ...

Why Your Gardenia's Leaves Are Turning Yellow and How to Fix the Problem March 11, 2021 ...

I recently answered a question in my advice column on some azaleas with leaves turning color. A significant percentage of the leaves had turned orange, and the gardener was concerned that something ...

DEAR JESSICA: I was a little confused after reading your Feb. 16 column about hardening off hibiscus plants. We have a hibiscus that stays in our greenhouse over the winter, and it gets put out in the ...