I’ve had a little trouble with my ‘Autumn Blaze’ maples. The one on the left above had chlorosis pretty bad last year, and it even lost most of its leaves in August only to grow back young leaves in September that got killed by fall frosts while still tender. I worried that it might not recover this spring. But it did show signs of life, and I implanted four Medicap iron supplements into the trunk in April. It has recovered quite well, with generally good green leaves. I hope the Medicap treatment lasts a few years.

The one of the right has been healthy in the past, and it still looks vigorous, but you can see that it’s a little yellow this year. These trees were supposed to be resistant to iron chlorosis, but they don’t appear to be as good as expected.

There is a third one that’s not in the photos, and it’s always been quite healthy. It also is one that gets sprinkler watered, while the other two get drip irrigation that is probably insufficient. Every two or three weeks, I run a sprinkler on the other two for four or five hours.