How big can a yucca tree grow?
Certified GKH Gardening Expert
While this is really dependent on the specific variety grown, some can get up to 12 feet without pruning. You need to research the type you are interested in to make sure that it will fit into your garden or home. For more info on yucca care, in general, as well as pruning, these articles will help: https://www.gardeningknowhow.com/ornamental/foliage/yucca/caring-for-and-landscaping-with-yuccas-outdoors.htm