Flowering Fern, Royal Fern
Osmunda regalis

Family: Osmundaceae
Genus: Osmunda (os-MUN-duh)
Species: regalis (re-GAY-liss)

Synonym:Osmunda regalis var. regalis

Synonym:Aphyllocalpa regalis

Synonym:Osmunda mexicana

Synonym:Osmunda palmeri

Synonym:Osmunda spectabilis

Category
Ferns

Height
24-36 in. (60-90 cm)
36-48 in. (90-120 cm)
4-6 ft. (1.2-1.8 m)

Spacing
4-6 ft. (1.2-1.8 m)

Hardiness
USDA Zone 3a: to -39.9 °C (-40 °F)
USDA Zone 3b: to -37.2 °C (-35 °F)
USDA Zone 4a: to -34.4 °C (-30 °F)
USDA Zone 4b: to -31.6 °C (-25 °F)
USDA Zone 5a: to -28.8 °C (-20 °F)
USDA Zone 5b: to -26.1 °C (-15 °F)
USDA Zone 6a: to -23.3 °C (-10 °F)
USDA Zone 6b: to -20.5 °C (-5 °F)
USDA Zone 7a: to -17.7 °C (0 °F)
USDA Zone 7b: to -14.9 °C (5 °F)
USDA Zone 8a: to -12.2 °C (10 °F)
USDA Zone 8b: to -9.4 °C (15 °F)
USDA Zone 9a: to -6.6 °C (20 °F)
USDA Zone 9b: to -3.8 °C (25 °F)
USDA Zone 10a: to -1.1 °C (30 °F)
USDA Zone 10b: to 1.7 °C (35 °F)

Sun Exposure
Sun to Partial Shade

Danger
N/A

Bloom Color
Inconspicuous/none

Bloom Time
N/A

Foliage
Grown for foliage
Deciduous

Other details
Average Water Needs; Water regularly; do not overwater
This plant may be considered a protected species; check before digging or gathering seeds

Soil pH requirements
5.1 to 5.5 (strongly acidic)
5.6 to 6.0 (acidic)
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)

Patent Information
Non-patented

Propagation Methods
By dividing rhizomes, tubers, corms or bulbs (including offsets)
From spores

Seed Collecting
N/A: plant does not set seed, flowers are sterile, or plants will not come true from seed