|Your expert answers to my gardening questions this Spring have been a great help--I thank you and my plants thank you! Here's another.....I have many camillias , different colors, all about 2 years old. Being from the North, I know little about them. Several of them have lost their deep green color. Leaves are a kind of sickly greenish yellow. I know that it's normal for some of the older leaves to yellow and fall off, but this off-color seems to be throughout the plant, except for the new Spring growth, which is just coming out. This is happening mostly with the japonicas, but some of the susanquas have poor color too. The shrubs bloomed normally, and I've used both fertilizer and ironite. They receive ample water. Could it be a fungus or insects--I see no insects at the moment. What can I do to help them out? Thanks!