Blechnum medium

Common Rasp-Fern

The Common Rasp-Fern, Doodia media, or Blechnum medium, is an evergreen fern forming low tufts of leathery green fronds. Bronze tones often tint the new growth, giving year-round interest. Small in scale and reliable in partial shade, it is suited to sheltered corners, containers, or shaded beds in Irish gardens.

Flowering Months

Jan J

Feb F

Mar M

Apr A

May M

Jun J

Jul J

Aug A

Sep S

Oct O

Nov N

Dec D

Size

Max Height

0.1 m — 0.5 m

Max Spread

0.5 m — 1.0 m

Growth Habit

Forms dense upright tufts or clusters of leaves and stems.

Planting Position

Sunlight i Indicates how much direct sunlight the plant needs each day. Full sun means 6+ hours, part shade is filtered or morning sun, and full shade is little to no direct sun.

Part Shade

Aspect i Aspect refers to the direction the planting spot faces (north, south, east or west). It affects light levels, warmth and exposure.

North East West

Exposure i Exposure describes how sheltered or exposed a plant’s position is, particularly to wind and weather.

Sheltered

Hardiness i Hardiness indicates how well a plant tolerates cold conditions outdoors. Higher ratings generally mean greater frost tolerance.

(−5 to +1 °C) Half-hardy

Ideal Soil Conditions

Soil Type i Soil type describes the texture of the soil (clay, sand, loam, chalk). This affects drainage, nutrients and how roots grow.

Loam

Soil Moisture i Soil moisture tells you how wet or dry the soil should be for best growth. Match this to your garden conditions for healthier plants.

Moist but permeable / Free draining

Soil pH i Soil pH measures how acidic or alkaline the soil is. It affects nutrient availability and can impact plant growth.

Acid

Plant Uses & Merits

Uses

Patios / Courtyards
Containers

Merits

Generally disease-free
Generally pest-free

Blechnum medium

Common Rasp-Fern

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Blechnum medium

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