Bee balm is a native perennial wildflower that grows wild over much of the midwestern U.S. It can be transplanted to most temperate areas. Once it is established, bee balm will self-seed readily. Bee balm can be propagated from seeds or from root divisions.
Select a site that is well-drained and sunny. Bee balm likes full sun, but it will tolerate partial shade. Bee balm will not produce as many flowers in shade, and a shady location may contribute to powdery mildew and other diseases common to moist or low-sunlight growing conditions. Snails and slugs can also be a problem in shady areas.
Prepare the planting bed by tilling or digging 8 to 10 inches deep. Most areas will not require fertilizer. An exception would be if you are planting in soil from a new construction site or where there is no topsoil, and you might use a light application of a balanced organic fertilizer in the early spring only.
Dig established bee balm plants and divide them in the spring. Bee balm spreads by stolons, which are underground stems, and a central plant mound usually dies after two or three years. When you dig bee balm, find the new plants that are connected by stolons and trim them apart for transplanting. Stolons may be a foot or more in length. Make sure each new little plant has a good root system of its own.
Set the new plants into the prepared planting area at the same depth they were previously growing. Space transplants about 18 inches apart, and water them in. Add a layer of humus or mulch to retain the soil moisture.