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
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: 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
On Aug 13, 2007, docturf from Conway, SC (Zone 8b) wrote:
I, too, agree that the Royal Fern does much better under high moisture levels -- mine has been in my Koi pond for 2 full seasons (contained in a 12 inch pot partially sumerged). It is thriving and continues to maintain both shape and color. Docturf
On Mar 25, 2007, Cretaceous from El Sobrante, CA (Zone 9b) wrote:
This fern is native to the eastern-half of the USA (including Texas), Canada, Costa Rica, El Salvador, Guatemala, Honduras, Mexico, Argentina, Bolivia, Brazil, Colombia, Ecuador, Paraguay, Peru, the Bahamas, Bermuda, Cuba, Jamaica, Burundi, Cameroon, the Central African Republic, Madagascar, Malawi, Rwanda, Sierra Leone, Tanzania, Uganda, and Zambia.
It is considered an threatened species in the state of Iowa, and is listed as exploitably vulnerable in the state of New York.
On May 16, 2004, Toxicodendron from Piedmont, MO (Zone 6a) wrote:
I agree with henryr, this fern is an aquatic or bog plant. It is native, though somewhat rare, in our area of Southeast Missouri. When found in nature, it is always streamside. When I purchased mine, it was labeled as a water plant. It is not growing in standing water, but it is in a plastic-lined bed with deep rich soil that I keep constantly moist. The plant also requires acid soil and light to medium shade.