Yellow Leaves on Pin Oak
Q: The leaves of my mature pin oak tree are becoming more yellow as time passes. I have tried the iron spikes etc. over the last couple of years with no result. Could this be a fungus? Should I have a tree expert come out and look at it? Steve - Grimes
A: Your tree needs iron. You can use iron capsules (Medicap) which are drilled into the tree. Use according to directions on the box. You could also apply iron using a Ross root feeder at the dripline with Green Again Pellets.