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Description
Polystichum Silvaticum, commonly known as the western holly fern, is a hardy evergreen fern native to western North America. It is a member of the Dryopteridaceae family and is known for its unique appearance, with fronds that resemble holly leaves. This fern is a popular choice for shady gardens, rock gardens, and woodland settings.
Taxonomic Information
| Domain | Eukaryota |
| Kingdom | Plantae |
| Phylum | Tracheophyta |
| Class | Polypodiopsida |
| Order | Polypodiales |
| Family | Dryopteridaceae |
| Genus | Polystichum |
Appearance
The Polystichum Silvaticum fern grows in clumps and can reach up to 2 feet in height and 3 feet in width. Its fronds are dark green and glossy, with a holly-like appearance. Each frond has 20-30 pairs of pinnae, with spores located on the undersides of the pinnae. This fern is evergreen, meaning it retains its foliage throughout the year.
Care Guide
To care for Polystichum Silvaticum, it is important to keep it in a shady location with well-draining soil that is rich in organic matter. This fern prefers consistent moisture, so it should be watered regularly to keep the soil from drying out. Fertilizer can be applied in the spring and summer, but it is not necessary for the fern’s survival.Polystichum Silvaticum is hardy in USDA zones 5-9, meaning it can tolerate temperatures as low as -20°F. In areas with harsh winters, it is important to protect the fern from frost by covering it with a layer of mulch.
Common Pests & Diseases
Polystichum Silvaticum is relatively pest and disease resistant. However, it may be susceptible to scale insects and spider mites. These pests can be controlled with insecticidal soap or neem oil.
Habitat
Polystichum Silvaticum is native to western North America, where it grows in shady forests, rocky outcrops, and along streams. It is commonly found in the Pacific Northwest, California, and the Rocky Mountains.
Question and Answer
Q: Can Polystichum Silvaticum be grown in containers?
A: Yes, this fern can be grown in containers as long as it is kept in a shady location and watered regularly.
Q: How often should Polystichum Silvaticum be fertilized?
A: This fern only needs to be fertilized in the spring and summer, and only if necessary for optimal growth.
Q: Is Polystichum Silvaticum toxic to pets?
A: No, this fern is not toxic to pets or humans.
Q: Does Polystichum Silvaticum require pruning?
A: No, this fern does not require pruning. However, dead fronds can be removed to improve its appearance.
Related Plants
Other ferns in the Polystichum genus include Polystichum Acrostichoides (Christmas fern) and Polystichum Munitum (sword fern).
References
- “Polystichum Silvaticum.” Missouri Botanical Garden, www.missouribotanicalgarden.org/PlantFinder/PlantFinderDetails.aspx?taxonid=282780&isprofile=0&basic=Polystichum%20silvaticum.
- “Polystichum Silvaticum.” Pacific Horticulture Society, www.pacifichorticulture.org/articles/polystichum-silvaticum/.
- “Western Holly Fern.” Royal Horticultural Society, www.rhs.org.uk/Plants/18025/i-Polystichum-silvaticum-i/Details.
With its unique appearance and hardy nature, Polystichum Silvaticum is a great addition to any garden that receives shade. By following its care guide and keeping an eye out for common pests, this fern can thrive for years to come.
