Monarda plants commonly grow from seed. The seeds do not require cold treatment to germinate, but the germination rate improves when exposed to two weeks of cold temperatures. Cover the seeds with twice their thickness of soil; they sprout in two to three weeks.
Take Monarda stem cuttings while the parent plant is still young. Remove the lower leaves on the cuttings and place the end of each cutting in a container with equal parts of potting soil and sand. Keep the rooting soil mixture moist until new roots grow.
You can also reproduce Monarda plants through divisions. Dig up the parent plant and separate the smaller plants from the larger plant. Replant the individual Monarda plants.