Last month, this column focused on the desirable characteristics of Christmas trees, one of which is good needle retention.

This contorted filbert cultivar is often grafted onto the rootstock of the straight species, meaning suckers from the roots will not show traits of the cultivar. In addition to being contorted, this ...

Q: I was reading your response to a reader's question about a contorted filbert. You mentioned pruning. I thought, "Pruning? Am I supposed to prune it?" It has such fascinating limbs that I've just ...