Of the native ferns, Western sword fern, Polystichum munitum, is the most common. Yet, it can be difficult to cultivate outside of its native range. Regional symbiotic soil microbes might be what limit its adaptability beyond its range. Locally in the wild, it prefers riparian situations. Within home gardens, established specimens are impressively undemanding.

As an understory species, Western sword fern should probably prefer partial shade. Yet, it can perform as well with full sun exposure. Although it appreciates organically rich soil, it can be satisfied with soil of inferior quality. New or relocated specimens need frequent irrigation as they disperse roots. Monthly irrigation can suffice for established specimens.

Western sword fern grows about two or three feet tall, but can get taller in partial shade. It might be twice as wide. The evergreen foliage is dark forest green. Individual leaves are pinnately compound and arching. New leaves mostly obscure old leaves that deteriorate after their first or second year. Shabby specimens regenerate well after getting cut back.