We have these weed trees, Siberian elm as well. They are a weed for those that think that every tree is good. They grow under steps and push them up, they grow in the lawn, flowerbeds and in flower pots. They take over garden plots. They destroy buried water lines They are a pest and almost impossible to remove. We cut about 15 out of our back yard but have, in a year, 6 foot trees again. I’m very interested in how I can permanently remove them.