Royal Fern plant profile
Osmunda regalis
A perennial fern for partial sun.
Last updated .
When to plant
When to plant Royal Fern
Royal fern is a large fern for wet ground and pond edges; its fronds emerge pale pink in spring and turn yellow-brown in autumn. Set out new plants in spring; it tolerates near full sun in cool-summer climates as long as the soil stays consistently moist.
The calendar shows this cited seasonal window as an approximate band. It does not convert the season into frost-adjusted dates.
Open Royal Fern in my garden calendarShows the source-backed planting season, not frost-adjusted dates.
Growing conditions
- Sun
- Partial sun
- Lifecycle
- Perennial
- Spacing
- 36 to 72 in apart
- Hardiness
- Zones 3a to 10bFind my hardiness zone
Next steps
Continue with Royal Fern
Evidence trail
Evidence behind this profile
Original extension and institutional publications behind the planting, care, and safety facts on this page.
- Osmunda regalis (Royal Fern)
North Carolina Extension Gardener Plant Toolbox (NC State Extension). Supports general reference. Checked 2026-06-18.