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Dryopteris dilatata
broad buckler-fern
Dryopteris dilatata
Dryopteris dilatata, commonly known as the broad buckler-fern, is a robust, deciduous fern native to Europe and parts of Asia and North America. It's known for its large, lacy, triangular fronds that can grow up to 1.2 meters long. The fronds emerge a light green in spring and mature to a darker green. It thrives in damp, shaded woodland conditions, forming attractive clumps. The name "buckler" refers to the shape of the indusia (covering over the spore clusters), which resemble small shields.
CategoryDetails
Plant TypePerennial plant
Estimated Plant Lifespan10 years lifespan
Sun RequirementsLess than 2 hours direct sunlight (Full Shade)
Pollination

Method: Spores

Notes: Wind dispersal plays a major role in spore dispersal. No manual pollination required.

Watering Requirements

Method: Top watering

Frequency: Keep soil consistently moist, but not waterlogged.

Notes: Avoid letting the soil dry out completely.

Humidity Requirements

Level: moderate

Maintenance: Misting occasionally or placing a humidity tray nearby can help maintain humidity.

Cleaning RequirementsRemove old or damaged fronds to promote new growth. Divide the plant every few years to prevent overcrowding.
Temperature Range

Min: -15°C

Max: 30°C

Alternative NamesPolypodium dilatatum
Tiarella cordifolia
Heartleaf Foamflower
Tiarella cordifolia
Foamflower creates a dense groundcover around the fern, helping to retain moisture and suppress weeds while tolerating the same shaded conditions.
Matteuccia struthiopteris
ostrich fern
Matteuccia struthiopteris

Both ferns aggressively spread through rhizomes and would compete for resources in a limited space. Ostrich fern is larger and may outcompete Dryopteris dilatata.

Sawflies

Sawfly larvae feed on the foliage, causing noticeable holes and potentially weakening the plant.

Aphids

Aphids can infest the undersides of fronds, sucking sap and causing distortion or yellowing. They can also spread diseases.

Steps:

    • Collect spores from mature fronds when they turn brown.
    • Sow spores on a sterile, moist medium in a covered container.
    • Maintain high humidity and indirect light.
    • Divide established clumps in early spring or fall.
    • Ensure each division has a healthy section of rhizome and fronds.
    • Replant immediately in appropriate soil and watering thoroughly.

Neem Oil

Effective natural insecticide against aphids and other pests.

Compost

Enriches the soil, providing essential nutrients for healthy growth.

Mulch

Helps retain soil moisture and suppress weeds.