Sorry if this is in the wrong section of the forum. We have a bunch of yucca type plants growing along a full sun area in the back of the house and they are completely out of control. We've neglected them for quite awhile as they don't seem to require much care but this year we decided they need some attention. They started out years ago as just a few individual plants, but have been steadily multiplying. They just grow one on top of the other and it's at the point that the new growth is unable to hold on to the old growth and several fall off each year, as well as they are extending too far out into the yard. I would like to clean this area up. Is now a good time to work on that area? They seem pretty hardy but i don't want to kill them. I think most of the ones on the bottom are dead, and i would like to dig those out and save as many living ones from the top as possible. They are also just too tall when the flower stalks come out so that is part of why i want to remove all the dead/browned bottom plants. Do i just pull them off individually and replant them? You can see from the picture what a mess they've become :/ Thanks.