Polystichum tsus-simense, commonly known as the Korean rock fern is a perennial herbaceous plant native to East Asia. Its common name corresponds with its ability to grow in shady areas of rock walls.
P. tsus-simense flourishes in shady areas with partial to no sun exposure in fertile and well-drained soil with high moisture. It can grow in acid, alkaline, and neutral soil, in part shade or full sun. It inhabits slopes and rocky places of forests and shores of streams. It can also grow in indoor pots and in shady areas of a garden. It has a clump-forming habit with many basal shoots forming open groups or clusters.