Certified GKH Gardening Expert
You can't really stop it from growing. If it is an indoor yucca, it may be rootbound. The leaves from the bottom are likely pups, which increase when the plant is under stress. Check to see if it is rootbound and if it is, you can repot it or you can root prune it. Root pruning will help keep it smaller. These articles will help:
Hi thanks for the response however myY
Yucca is outdoors is there anyway I can stop it growing it's about 10 feet high also where do o start to prune top or bottom and should I take off leaves from the base.