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Cheilanthes Sieberi (Poison Rock Fern / Mulga Fern)

Cheilanthes Sieberi (Poison Rock Fern / Mulga Fern)

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Cheilanthes Sieberi (Poison Rock Fern) is a hardy Australian native fern admired for its delicate, finely divided fronds and remarkable ability to thrive in dry, rocky environments. Its attractive grey-green foliage creates a soft, textured appearance that complements native gardens, shaded rockeries and naturalistic landscapes. Unlike many ferns, this resilient species tolerates periods of drought once established, making it an excellent choice for low-water gardens.

Compact and easy to maintain, Cheilanthes Sieberi performs best in well-drained soils with protection from intense afternoon sun. It is ideal for rock gardens, crevice plantings, containers and understorey displays where its graceful foliage adds year-round interest. Its unique adaptability and attractive form make it a valuable addition to both residential and commercial landscapes.

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Mature height

0.2–0.4 m

Mature width

0.3–0.5 m

Spacing

0.3–0.5 m apart

Evergreen/Deciduous

Evergreen

Foliage

Grey green to silvery green finely divided fronds with a slightly hairy texture and paler undersides

Flowering Period & Fruit Development/Harvest

Non flowering fern, reproduces via spores throughout the year

Sun tolerance

Full sun to partial shade

Maintenance

Low maintenance. Remove old or damaged fronds as needed and maintain well-drained soil.

Root System

Compact, fibrous, non-invasive root system