Pin Oak Tree

[rperrone]

I planted two Pin Oaks appropriately four years ago. They look great except one developed knuckle sized lumps with tiny holes in them. These lumps are located on several branches. Help!

[Thunderbird+]

The lumps sound like one of the many galls that can often be found on oak trees, they are caused by a tiny wasp that according to the species lay their eggs in various parts of the tree. they are unlikely to cause any real harm to the tree.