Contents
Description
Parapolystichum Glabellum, commonly known as the Smooth Japanese Holly Fern, is a herbaceous evergreen fern native to Japan, Korea, and China. It belongs to the Polypodiaceae family and is characterized by its glossy, leathery fronds that grow in an upright, vase-like shape. The fronds can grow up to 1-2 feet tall and 1-2 feet wide, making it an ideal choice for adding texture and interest to shady garden beds or as a container plant.
Taxonomic Information
| Domain | Eukarya |
|---|---|
| Kingdom | Plantae |
| Phylum | Pteridophyta |
| Class | Polypodiopsida |
| Order | Polypodiales |
| Family | Polypodiaceae |
| Genus | Parapolystichum |
Appearance
The Smooth Japanese Holly Fern has glossy, dark green fronds that are leathery and have a holly-like appearance. The fronds grow in an upright, vase-like shape and can reach up to 1-2 feet tall and wide. The fronds are bipinnate, meaning that they are divided into multiple segments with smaller leaflets branching off from the main stem. The fronds emerge from a central rosette and can have a slightly arching growth habit.
Care Guide
To keep your Smooth Japanese Holly Fern healthy, follow these care guidelines:Water: Keep the soil consistently moist but not waterlogged. Water deeply once a week or more often during hot, dry weather.Fertilization: Feed with a balanced, water-soluble fertilizer every 2-3 weeks during the growing season.Soil: Plant in well-draining soil that is rich in organic matter. The ideal pH range is 5.5-6.5.Sunlight: Grow in partial to full shade. Avoid direct sunlight, as it can scorch the fronds.Hardiness Zones: Parapolystichum Glabellum is hardy in USDA zones 6-9.
Common Pests & Diseases
The Smooth Japanese Holly Fern is relatively pest and disease resistant. However, it can be susceptible to spider mites, scale insects, and mealybugs. To prevent these pests, keep the plant well-hydrated and avoid over-fertilizing. If you notice an infestation, treat with an insecticidal soap or neem oil spray.
Habitat
Parapolystichum Glabellum is native to Japan, Korea, and China, where it grows in shady, moist habitats, such as forest floors and rocky cliffs. It prefers well-draining soil that is rich in organic matter and thrives in partial to full shade.
Question and Answer
Q: Can Parapolystichum Glabellum be grown indoors?
A: Yes, it can be grown indoors as long as it is placed in a shady location and kept well-hydrated.Q: How often should I fertilize my Smooth Japanese Holly Fern?
A: Fertilize every 2-3 weeks during the growing season with a balanced, water-soluble fertilizer.Q: Is Parapolystichum Glabellum deer-resistant?
A: Yes, it is deer-resistant.Q: Can I divide my Smooth Japanese Holly Fern?
A: Yes, you can divide it in the spring by gently pulling the fronds apart and replanting them in fresh soil.
Related Plants
Here are some other ferns that are related to Parapolystichum Glabellum:
- Adiantum pedatum (Maidenhair Fern)
- Athyrium filix-femina (Lady Fern)
- Dryopteris erythrosora (Autumn Fern)
- Polystichum acrostichoides (Christmas Fern)
References
- “Parapolystichum Glabellum.” Missouri Botanical Garden. Accessed 13 April 2021. <https://www.missouribotanicalgarden.org/PlantFinder/PlantFinderDetails.aspx?kempercode=f860>
- “Parapolystichum Glabellum.” Plant Delights Nursery. Accessed 13 April 2021. <https://www.plantdelights.com/products/parapolystichum-glabellum-smooth-japanese-holly-fern>
- “Parapolystichum Glabellum.” Royal Horticultural Society. Accessed 13 April 2021. <https://www.rhs.org.uk/Plants/214819/Parapolystichum-glabellum/Details>
