Tsushima Holly Fern, Tsus-sima Holly Fern, Korean Rock Fern

I guess it is too cold in zone 6b because neither of my plants survived.

Named after the Japanese island of Tsus-Sima, this fern is native to Japan, Korea, China, Vietnam, Thailand, and Indochina.

...Read More Probably my favourite widely-cultivated (non-U.S. native) fern, and has thrived here in zone 9b.

Polystichum tsus-simense is evergreen and fairly hardy. It is a steady medium-paced grower, with rich dark-green fronds, and can take several years to reach a moderate size. It is often seen locally in the nursery departments of stores such as Orchard Supply Hardware.

Neat, attractive, compact habit. Long used in the South. Dark green typical fern appearance. This is the fern used in corsages because of...Read More it’s minute scale and detail.