Ostrich fern is a clump-forming, arching, deciduous fern which typically grows 2-3′ tall in cultivation. Great fern for massing in moist, shady woodland areas, wild gardens or wet areas near streams or ponds. Interplant with ... early spring wildflowers like trilliums, bloodroot, and Virginia bluebells which will be well on the way toward dormancy by the time this fern reaches full size. Prefers rich soils with constant moisture, but will easily grow in average, medium to wet soil in part to full shade. Spreads by underground rhizomes to form dense colonies in optimum growing conditions.