Answer: If you previously had plants growing around the tree they may have grown too close to the trunk of the tree and held too much moisture against the bark. This can cause fungus to grow. Now that the plants have been removed, the fungus should dry up because there is better air circulation. You can still plant your roses, you'll just have to find spots between the roots in order to dig. Or, start with smaller rose plants with smaller root systems that you can get into any holes you can dig. It won't hurt the tree to remove a few small roots, but try not to damage any of the larger roots. Best wishes with your new roses.
Q&A Library Searching Tips