Polystichum munitum is one of the most abundant ferns occurring along the Pacific coast and in the Bay Area. The dark green fronds of this easy-to-grow fern can reach +4′ tall in a tight clump spreading out radially from a round base. Individual fronds live for 1.5-2.5 years and remain attached to the rhizome after withering. This handsome fern prefers full shade to partial sun and is very tolerant of clay or slow-draining soil. Once established, it can require infrequent watering but prefers some regular moisture to perform well. If you’re looking for an easy-care fern for cool Bay Area landscapes, this is one of the best.