Ferns are the forgotten category of perennials for shady areas. We always marvel at them at zoos and botanical gardens, but when it comes to incorporating them into our landscape designs, they usually slip our minds. Residential lots are not only smaller, they're also shadier. He will be looking for something green to grow under that tree.
Ferns are good alternatives to English ivy, Asiatic jasmine and liriope.
Autumn fern, Dryopteris erythrosora , is one of the best choices for landscapes, although its common name is misleading. In fall, fronds can change to a slightly more russet tone. Autumn fern is hardy to USDA Hardiness Zone 5 and stays evergreen in frost-free areas. It has no serious pest or disease problems, but does require evenly moist soil. If plants begin to dry out, they will wilt and change color slightly as a warning they need more water.