Custom Built Trees I use steel dowels and special fiberglass epoxy on the joints to create trees that fit exactly into an area. Any kind of leaves, flowers and/or lights can be added. I like to leave some of the roots showing at the base, and then add moss around them so they appear to be growing in the container. Using real trunks and branches from a similar tree looks natural, but it would be a lot of fun to use a dark trunk and have all the smaller branches be from Red Dogwoods. this one needs the moss added between the roots. The base is heavy enough to keep the tree stable. Once the wood dries out completely it will be even better. This tree has some of the bigger branches with two or three joints in them, to get them to curve up into the space and appear to have grown there.