Myriopteris tomentosa aka Woolly Lipfern

Myriopteris tomentosa, or woolly lip fern, belongs to the Pteridaceae family. Its native range spans the central and eastern United States into Mexico. It grows in rocky places within this range. Sources also name it Cheilanthes tomentosa and Hemionitis bradburyi. This small perennial fern keeps its leaves through the year. Its soft, grey-green fronds give it much of its garden interest.

Garden plants reach about 0.3–1.6 feet (0.1–0.5 metres) in height and width. The RHS gives two to five years for plants to mature. Individual leaves measure about 0.5–1 foot (0.15–0.30 metres) long. They have dark grey-green upper surfaces and silver scales beneath. The stems are deep purple to black. Hairs cover much of the foliage and stems. Fronds grow in clusters, with opposite pinnae along each blade. These divided leaves have a soft feel. This fern makes spores rather than flowers or fruit.

The two garden sources differ on light needs. NC State recommends dappled sun or part shade. The RHS recommends full sun in a sheltered site. Both stress the need for soil that drains well. Loam, sand, and shallow rocky sites suit the plant. The RHS lists acid to neutral soil. It also calls for grit and humus in the growing mix. This fern copes with drought and poor soil better than many ferns. Its fronds curl during dry spells, then recover with water.

Winter rain poses a greater risk than dry soil. The RHS advises shelter from winter wet and rates it H4. NC State lists USDA zones 6a through 8b. Under glass, provide strong light, low humidity, and good airflow. Water sparingly there, using a gritty, loam-based mix. The RHS also includes charcoal in its potting recipe. Rock gardens, gravel beds, slopes, and containers offer suitable settings. NC State also suggests woodland and native plant gardens.

Deer and rabbits seldom damage this fern. NC State reports no major pest or disease problems. The RHS likewise reports few pests, but warns of fungal root rot under glass. Plants need no pruning. Fresh spores can start new plants at 61°F (16°C). Spring division is possible, though disturbing the rhizomes can cause problems. Neither source provides evidence for food use or human and pet safety.