Try Killing the Shrub with a Copper Spike An old fashioned easy and inexpensive way of doing this is to cut the shrub or tree as low to the ground as possible and drive a copper spike into the center of stump. Removing Rose Bush Roots. How To Take Care Of Roses For Dummies Rose Bush Care Trim Rose Bushes Rose Care You also want the soil to be warm and somewhat loose. How to kill a rose bush . The best method for getting rid of this plant is through a combination of mechanical and chemical techniques. One easy completely natural way of killing a rose bush is boiling water. For a fully developed plant digging pulling and cutting the bush to a stump is. You may need persistence and multiple applications to kill off your stump completely. Be careful to avoid spillover to nearby plants when pouring. It should kill the thing from the inside out. The soap will act as a surfactant which lowers the surface tension of a liquid thereby increasing the contact between the solu...