“What is causing these lumps (above) on my live oaks?” asks Birds & Blooms reader Katherine Gerritsen of Grand Cane, Louisiana. Horticultural expert Melinda Myers says, “Abnormal growths on a variety ...

What are these blister-like things on the leaves of my oak tree? Will it harm them? P.T., Tulsa The structure on your leaves is a common oak leaf gall and will not harm a mature tree. Galls are ...

Q. My oak tree has these marble-sized growths on some of the limbs which I am told are galls. What can I do about them? A. Nature creates many amazing things, and plant galls are among the most unique ...