A superb, dwarf Bee Balm selection, like a short and manageable version of 'Cambridge Scarlet' or 'Gardenview Scarlet'. 'Fireball' averages about 15in high, and its deep scarlet flowers have the same hummingbird appeal and the same intensely aromatic foliage. This North American genus has several species, all of which share tartly fragrant foliage and the square stems that typify members of the Mint family. The late-summer flower heads are hemispheres of tubular blooms in brilliant colors. Plants thrive in full sun or partial shade and evenly moist soil (which helps avoid mildew). Under these conditions, they are vigorous to the point of invasiveness, perhaps past it.