Perhaps, that's part of the challenge. I don't know what kind of Oak it is. The leaves stay this combination of green/brown all season long... every year. Any idea what kind of Oak it is?

Looks like bur oak

where are you? ... have you ever had a soil test done.. are you aware of any local soil anomalies???

you might take a leaf or 2 to your COUNTY extension office.. and see if they can help ...

ken

Common for young oak leaves -- they'll turn green.

All the leaves stay partly bronze all summer or just the newest ones, at the ends of the branches?

All the leaves are staying the green brown combination all season, every season.

I agree Lane it looks like Burr Oak but I've never seen Burr Oak leaves like these before. BTW - other than the odd coloring to the leaves the tree is very healthy.

I've noticed that bur oak sometimes come out like this, but as other have noted it usually works its way to a deep green. Maybe you have a genetically unique tree that could be propagated, trademarked and sold for its unique foliage? You may be sitting on a gold mine??

Your tree looks perfectly healthy and the yellow doesn't look like any disease that I've seen.

My bur oak looks exactly like that when the leaves first emerge, very beautiful and I wish they would stay that way all year but after a couple of weeks they turn dark green. Sometimes a second growth spurt will happen later in the season with the new leaves looking like yours but alas, turning dark green again and blending in with other plants I have like the lilac bushes, other trees and grass.

I agree, if you could clone that one, there would be a huge demand for it.