Q: I recently noticed a black, tar-like patch on my tree trunk, though it’s not tacky like actual tar. Are these insect eggs? Dried sap? Do I try to scrape it off? The tree has lichen but I don’t ...

Pollarding is a type of severe pruning that results in a dense growth of branches at the pruning site instead of its naturally shaped crown. Last fall, I decided to pollard a catalpa tree to re-create ...