Monarda 'Peter's Purple' is a natural hybrid of Monarda fitulosa 'Claire Grace' and Monarda barlettii that occurred in the garden of Texas native plant expert Peter Loos. It is a clump-forming herbaceous perennial with aromatic, lance-shaped leaves. It has terminal whorls of two-lipped, 2.5" lavender purple flowers. 

It does well in full sun but appreciates some afternoon shade in hot summer climates. Soils must remain moist but well-draining. Remove spent flowers to prolong bloom. Divide clumps every 3-4 years. This plant slowly spreads by rhizomes.