Polystichum acrostichoides has the common name Chistmas Fern because it stays green right through the holiday season. It is a hardy, leathery fern that has glossy, green fronds year-round. They grow in clusters from a cro ... wnless rootstock and range from 1-2 ft. The silvery fiddleheads emerge in early spring. This fern is very easy to grow where conditions are right. It requires cool, moist, well-drained soil in shade. In the right spot, it can be a good, evergreen border or accent plant.