Lady Fern
Athyrium filix-femina
Lady Fern is grown for its foliage rather than flowers, giving the garden structure and color all season long.
Mature size, hardiness zones, sun and the trait tags were checked against named botanical sources for this plant. The bloom months and water need on this page were not.
Growing Lady Fern
Plant it in part shade. It prefers moderate water. It is hardy in USDA zones 4–8. Expect it to reach about 2.3 ft tall and 2 ft wide at maturity, in roughly 3 years.
When to plant Lady Fern
Plant Lady Fern in early spring as soon as the soil is workable, or in early fall at least six weeks before your first frost, so roots establish in cool weather. For the middle of its hardy zones 4 to 8 range, spring means March to May and fall means August or September.
Month-by-month timing for your zone is on the planting calendar: for the middle of its range, start with zone 6 in March.
Good to know about Lady Fern
Curated from university extensions, botanic gardens and other primary sources, with the source named on every note.
Worth knowing
Unlike most ferns it takes real sun, but only where the soil stays reliably moist. In dry sun the lacy fronds scorch, so sun and water are linked. per NC State
Zone range differs by source
NC State rates it hardy to zone 3a; Missouri Botanical Garden gives 4 to 8. Both agree it is very cold-hardy, so gardeners in colder zones can try it. per NC State and Missouri Botanical Garden
Deer and rabbit resistant
Rated resistant to deer and rabbits. Deer may nibble the fronds lightly in summer, but the plant is generally left alone. per NC State and Illinois Wildflowers
Spreads slowly, not a runner
It creeps outward slowly by short rhizomes to form patches, but does not take over the way ostrich fern does. A well-behaved shade groundcover. per NC State
Deciduous: bare in winter
It drops its fronds after hard frost and dies back for winter, then unfurls fresh in spring. Plant it over spring bulbs to hide their fading leaves. per NC State
Brittle fronds; shelter from wind
The lacy fronds and stalks are brittle and snap in strong wind, and they tatter by late summer. A sheltered spot keeps them looking good longer. per Missouri Botanical Garden
What pairs well with Lady Fern
Good companions share its growing conditions and add something it lacks: an earlier or later bloom, a lower carpet in front, or structure through winter.
Northern Sea Oats
Shares part shade and moderate water; its seed heads stand through winter, for structure and the birds; taller at 3.3 ft, for the layer behind it; both are native plants.
Rhododendron
Shares part shade and moderate water; evergreen, so the bed keeps its shape through winter; taller at 5.9 ft, for the layer behind it.
Christmas Fern
Takes part shade to full shade and moderate water; evergreen, so the bed keeps its shape through winter; both are native plants.
Bergenia
Takes part sun to part shade and moderate water; evergreen, so the bed keeps its shape through winter.
Hellebore
Shares part shade and moderate water; evergreen, so the bed keeps its shape through winter.
Autumn Fern
Shares part shade and moderate water; evergreen, so the bed keeps its shape through winter.
Holly Fern
Takes part shade to full shade and moderate water; evergreen, so the bed keeps its shape through winter.
Japanese Forest Grass
Shares part shade and moderate water; its seed heads stand through winter, for structure and the birds.
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