5 lilac bushes, 8' tall, 3' apart. Look like crap. I offerred to prune them at the right time and bring them back to fullness. No, she wants them removed. I have removed lilacs many times before. But they were always overgrown and 15' to 20' feet tall with a root 4' across. I simply cut the canes and had the roots ground out. My question. How hard would it be to pull the roots on 8' bushes like this? I've heard that lilacs have a long tap root. Is this true?