Q: Our 10-year-old birch tree has a smaller trunk coming out of the main clump. When would be the best time to remove it, and should it be sealed after the cut? - Paul Thulen, Breckenridge, Minn. A: ...

Q. I have a clump birch that was planted in 1991. It has grown beautifully until this year. Long "seed worms" developed on two trunks, then shriveled up and now there are dead leaves on some of the ...

Q: In my yard I have a clump of three birch trees planted two or three years ago. This past spring a deer used it as a scratching post and tore off a significant amount of bark on one of the trees, ...