Propagate your money tree using stem cuttings in the spring or summer, when the plant is actively growing. Start by snipping off 10- to 15-centimeter cuttings and placing them in water to grow roots. After a few weeks, once the roots have developed enough, dip the cuttings in a rooting hormone and transfer them into the soil. Money trees can also be propagated by air layering, which is a slightly more complicated method but tends to yield better results.