Most plants that are sold here are sold as clippings or rooted clippings unless otherwise stated. If you are planning to put the plants into a dart frog vivarium they will easily root if  the stem is placed in damp sphagnum moss, with the high humidity in the vivarium. If you wish to root them before placing them in your vivarium I recommend placing them in a 24oz deli cup or tupperware with the lid sealed to keep the humidity high, with damp sphagnum as a substrate.