Acanthus Mollis (Oyster Plant)
Acanthus Mollis (Oyster Plant)
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Acanthus Mollis, commonly known as Oyster Plant, is a bold, architectural perennial with large, deeply lobed, glossy green leaves that create a lush, tropical effect in gardens. In late spring to summer, it produces striking tall flower spikes adorned with purple and white tubular flowers, adding a dramatic vertical element to garden beds and borders.
Highly adaptable, Oyster Plant thrives in shaded areas but can tolerate partial sun with sufficient moisture. It is a hardy, low-maintenance plant that spreads over time, making it excellent for groundcover in shaded landscapes. Its lush foliage provides an elegant contrast to other plants, making it a favourite in cottage, woodland, and formal gardens.
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Mature height
0.8–1.5 metres
Mature width
0.6–1.2 metres
Spacing
0.6–1.0 metres
Evergreen/Deciduous
Evergreen in warmer climates, semi-deciduous in cooler regions
Foliage
Glossy green foliage with tall spikes of purple and white flowers
Flowering Period & Fruit Development/Harvest
Late spring to summer (October to February)
Sun tolerance
Prefers partial shade but tolerates full shade and some sun with adequate moisture
Maintenance
Low maintenance. Prune spent flowers and tidy up old foliage in late winter. Mulch to retain soil moisture.
Root System
Produces a moderately deep, non-invasive root system that offers good stability. Roots typically extend 30–100 cm into the soil and are safe to plant near structures when spaced appropriately