Polystichum acrostichoides Christmas Fern Sun: Partial,Shade Moisture: Dry,Medium Height: 1'-2' The firm deep green leaves of Polystichum acrostichoides make it a great companion for woodland wildflowers. Strongly evergreen, fronds of the Christmas Fern were used by early New England settlers for Christmas decorations. Grows best on well-drained slopes with low to moderate fertility, in neutral to strongly acid soils. Not recommended for rich soils or moist areas. Hardy to Zones 3 - 9.