Two of my gardenia plants (out of 5 pots on my 7th floor balcony that receives afternoon sun) have their leaves turn yellow. I don't seem to be doing the right care, though I have fed them iron and lemon mainly. What do I need to do?
Reason Why Gardenia Leaves Turn Yellow
Certified GKH Gardening Expert
Gardenia plants are known to be finicky!
Yellowing leaves could be due to watering issues; to much or to little.
It also could be due to insects so inspect the plant carefully.
Here are links to help you pinpoint the issues.
Here is some great links that will help you.