Korean Rock Fern, Tsus-sima Holly Fern
The Korean Rock Fern is a semi-evergreen holly fern, compact in stature and suitable for small spaces in the garden, and is fully hardy for the UK climate.
Polystichum tsus-simense exhibits glossy green leaves with a hint of steely blue that create pleasing contrast with its black scales and leaf bases.
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Native to Korea, China and Japan, as well as a range of countries in the south of Africa, where it’s often found on forest floors and rocky slopes. This makes it a perfect fern for rocky fern gardens or at the front of a shaded border.
The name ‘Tsus-sima Holly Fern’, and its specific epithet, refers to the Island of Tsushima, a part of the Japanese archipelago which, contrasting with its other common name Korean Rock Fern, suggests its broad native range.
Care & Size Guidance
This fern is fully hardy and easy to grow, though do protect its crowns from abundant moisture in winter.
It’s usually semi-evergreen in the UK climate and best placed in free draining soil in sheltered spots of the garden that receive partial to full shade.