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Polystichum tsus-simense Perfect fern for small spaces! 'Korean Rock' forms a low mound of dark green fronds with black stems and delicate dark veining through the leaflets. New leaves have a purplish cast. In cold regions, this may be grown in a container and wintered indoors. Plant under shade trees and large shrubs to cover exposed soil.  Clumps may be divided after 4 to 5 years, in early spring. Trim off any tired-looking fronds in spring, and they will soon be replaced by new ones. Tolerates summer heat and humidity. It prefers wet or evenly moist soil. Plant in humus-rich soil in partial to full shade. Arrives to you in a one-gallon pot

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