Astelia chathamica - Silver Spear
DESCRIPTION & SIZE GUIDE
Astelia chathamica, or Silver Spear, is a bold, clump-forming perennial native to the Chatham Islands. It typically grows 1 - 1.5 metres tall and wide, with striking silver-green, sword-like leaves that fan outward to create a dramatic architectural feature. Its foliage shimmers in sunlight, making it a standout in mixed plantings, borders, and modern garden designs. In summer, mature plants produce small flowers followed by orange berries. For landscaping, space plants 1 - 1.5 metres apart for full coverage or as individual specimen features.
ECOLOGICAL BENEFIT
The flowers of Silver Spear attract native insects, while its fruit provides food for birds. The dense foliage creates ground-level shelter for invertebrates and lizards. Its resilience makes it a valuable addition to urban and coastal plantings where both biodiversity support and design impact are important. Planting Astelia chathamica helps maintain genetic diversity of Chatham Island natives while providing a practical, low-maintenance landscaping option.
GROWING CONDITIONS & CARE
Astelia chathamica grows best in full sun to partial shade and prefers moist, well-drained soils. It is tolerant of coastal exposure and wind, making it ideal for coastal gardens, open landscapes, and urban sites. While drought-tolerant once established, occasional watering in dry summers helps maintain lush foliage. Hardy to frost and generally low-maintenance, it may be trimmed back if leaves become damaged, with new growth quickly restoring its striking form.
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