I have this large bridal veil bush in my backyard. It's about 30 feet wide and about 5 feet high. I would like to remove it and replace it with trees, but I find it very dificult to remove, especially the roots that are very though and deep. Is there an easy way to remove the whole bush withouth having to yank the roots out of the soil with my car? Could I perhaps use a weed killer first in early Spring? The roots will have to come out otherwise I can't plant my trees. Do you have any suggestions?