How to kill yucca and remaining roots in garden.
Certified GKH Gardening Expert
To kill it, cut it down as close to the ground as possible and then paint the fresh cuts with concentrated Round-up. Keep an eye on it and if you see any shoots, you can repeat this process. This article will help: https://www.gardeningknowhow.com/ornamental/foliage/yucca/removing-yucca.htm