Yellowing leaves? Iron chlorosis symptoms and treatment.

Yellowing leaves? Iron chlorosis symptoms and treatment.

My hydrangeas have been yellowing for a couple of years. Up until now I‘ve treated them with an iron supplement. After doing some research, I’m ready to work on some probable causes:

– lower the pH

– correct a drainage problem

– As always, I should be doing a soil test before doing anything else! 

Here are three excellent articles on identifying and dealing with chlorosis:

Missouri Botanical Garden – Iron Chlorosis

Utah State University – what is Iron Chlorosis and What Causes it?

Government of Canada Agriculture – Iron Chlorosis

Hydrangea with yellowing leaves and green veins. Very typical of chlorosis.
Asiatic lilies in same bed are now showing symptoms
A product I’ve been using to treat symptoms