John Elliott wrote:Mulberry grows very vigorously from coppices, so even if you do as Walter says and cut repeatedly, it may not be enough. That's going to be a match between your resolve and the stored energy in the mulberry roots to see which gives out first. And you don't want to give up for a moment, because all the photosynthetic energy from the new sprouts is going to go into making more root mass, doing even more foundation damage.
Mulberry really can't be killed by withholding water. I had one in Las Vegas that I wanted to remove and it didn't need any water other than the 4" of normal rainfall in Las Vegas. I theorize that its roots had found the aquifer under Las Vegas and it will come back indefinitely. What you are going to have to do is deny it light. Get some thick black plastic and some bricks and after you have cut it at ground level, cover the stump (and anywhere else it might try to send up a shoot) with black plastic weighted down with bricks. And then wait it out.