Question From: E. ROGERS - Rome, Pennsylvania, United States
Q: my phlox has a big problem. Its leaves are turning yellow. The yellow starts at the bottom of the plant and has gradually crept up to the top--killing all leaves on the bottom. It only has a few green leaves at the top now. I would appreciate your help with this problem. If I rip them out this fall and plant new ones in their place--what can I do to prevent this from happening to my new plants?
If the flowers become distorted along with the leaves you may have asters yellow. This disease is spread by leaf hoppers and mites, but die when the plants die. Too much water and spider mites - one or both, can also cause leaves to yellow. Check the undersides of the leaves with a magnifying glass. Best And Happy Yardening, Nancy