Royal Fern
Osmunda regalis
Last reviewed: July 2026
Royal Fern (Osmunda regalis) is a large deciduous fern native to Kansas that thrives in moist, shaded areas. This stately fern produces distinctive fertile fronds from May through July.
The USDA PLANTS Database (opens in new tab) does not flag Royal Fern as toxic to livestock.
Light
part shade
Water
high
Size
24"–72" H × 24"–48" W
Bloom
May, Jun, Jul
Native to
AL, AR, CT, DE and 32 more states
Browse plants for this ecoregion
Royal fern is an elegant native fern that forms tall, graceful clumps with bright green fronds. It thrives in moist, shaded areas and produces distinctive fertile fronds that resemble flower clusters in summer. The fronds turn golden yellow in fall before dying back for winter.
Growing Royal Fern
Grow Royal Fern in part shade and high water. Mature plants reach 24 to 72 inches tall and spread 24 to 48 inches wide. Expect moderate maintenance to keep it looking intentional in a front yard.
In an HOA neighborhood
Royal Fern is an HOA-friendly choice. Maintenance level: moderate. Tidiness: 4 out of 5.
Works well in: front yard, foundation, mid zone.
- Requires consistent moisture to maintain appearance
- Can look sparse in winter dormancy
Wildlife value
This fern provides habitat and shelter for various insects, amphibians, and small wildlife. The dense clumps offer nesting material and cover for birds and beneficial insects.
Common questions
- What growing conditions does Royal Fern prefer?
- Royal Fern grows best in partial shade to full shade with consistently moist to wet soil conditions. It tolerates some morning sun but struggles in hot, dry locations.
- When does Royal Fern produce spores?
- Royal Fern produces its characteristic fertile fronds containing spores from May through July. These golden-brown spore clusters appear at the tips of some fronds, giving the plant its royal appearance.
- How large does Royal Fern grow?
- Royal Fern can reach 3-6 feet tall and wide at maturity, making it one of the larger native ferns. It forms attractive clumps over time through underground rhizomes.
- Is Royal Fern native to Kansas?
- Yes, Royal Fern is documented as native to Kansas, though it is more commonly found in the eastern portions of the state where moisture levels are typically higher.
- Is Royal Fern toxic to livestock?
- The USDA PLANTS Database does not flag Royal Fern as toxic to livestock.
- Is Royal Fern HOA-friendly?
- Royal Fern is generally an HOA-friendly choice in the right placement, with moderate maintenance.
Native range data from the USDA PLANTS Database and regional native plant society lists. Pollinator and host plant associations compiled from GBIF, iNaturalist, and published ecological literature.
Ready to grow Royal Fern? Add it to your garden in Pollinator Patch to track it and get season-by-season care guidance.
Not sure where to start? Take the 2-minute yard quiz