Water
Keep the soil consistently moist but not waterlogged. Water deeply when the top inch of soil feels dry. This fern thrives in boggy conditions or near water features.
Also known as Flowering Fern · Regal Fern · Royal Fern
Osmunda spectabilis, the American Royal Fern, is a large, deciduous fern native to eastern North America, known for its stately fronds and adaptability to moist environments.
At-a-glance light, water, soil, and growing conditions from plant data
Prefers partial to full shade.
30% intensity
Can tolerate some sun if soil is kept moist.
Keep soil consistently moist.
80% intensity
Water deeply when top inch is dry; tolerates boggy conditions.
Prefers rich, organic, well-drained soil with consistent moisture.
50% intensity
Ideal growing range is 15-25 °C.
60% intensity
Tolerates cooler temperatures but protect from hard frost.
Outdoor, Greenhouse
50% intensity
Fertilize sparingly.
20% intensity
Use balanced slow-release fertilizer in spring or top dress with compost.
Safety information from plant toxicity data
| Attribute | Value |
|---|---|
| Toxic for humans | No 0/5 intensity |
| Toxic for pets | No 0/5 intensity |
| Edible | No |
Key traits and growing stats from plant data
Watering, pruning, propagation, and repotting details from plant data
Keep the soil consistently moist but not waterlogged. Water deeply when the top inch of soil feels dry. This fern thrives in boggy conditions or near water features.
Remove dead or damaged fronds at any time. Cut back all fronds in late winter or early spring before new growth emerges to maintain a tidy appearance.
Easily propagated by division of rhizomes in early spring. Sow spores on sterile medium in a humid environment for a slower, more challenging method.
Established plants in the ground rarely need repotting. Container-grown plants can be repotted every 2-3 years in spring into a larger pot with fresh, moist potting mix.
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Monthly activity intensity for bloom and fruit across both hemispheres.
Flowering & fruiting calendar
Flowering & fruiting calendar
Photos of American Royal Fern (Osmunda spectabilis)
Where American Royal Fern (Osmunda spectabilis) is found
Density
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Common names and botanical synonyms
Botanical classification
| Rank | Name |
|---|---|
| Kingdom | Plantae |
| Division | Tracheophyta |
| Class | Polypodiopsida |
| Order | Osmundales |
| Family | Osmundaceae |
| Genus | Osmunda |
| Species | Osmunda spectabilis |
Similar in genus Osmunda
Answers based on plant encyclopedia data
