Chatham Islands Astelia Astelia chathamica
ABOUT
The Chatham Islands Astelia is a striking plant with silvery-green, flax-like leaves that create a dense, clump-forming habit. The foliage has a metallic sheen and a sword-like shape, which lends a dramatic and modern appearance to any garden setting or landscape. The leaves are arranged in a rosette pattern and can drape gracefully, giving the plant a flowing, fountain-like aspect. Its attractive appearance is complemented by red-orange berries that emerge following the flowering season. The flowers themselves are not particularly showy, being small and often hidden among the foliage. These characteristics make the Chatham Islands Astelia a plant with both visual appeal and textural interest, making it a unique addition to plant collections or as a specimen in designed spaces.
About this plant
NamesFamily
Asteliaceae
Synonyms
Chatham Islands Astelia, Maori Flax
Common names
Astelia chathamica subsp. chathamica, Astelia banksii var. chathamica
ToxicityTo humans
Silver spear is not widely known to be toxic to humans. There are no well-documented cases of poisoning from ingesting any part of the Astelia chathamica, commonly known as silver spear, and it is generally considered not harmful if touched or ingested in small quantities. However, as with any plant, individual allergies or sensitivities may exist, and it is always advisable to err on the side of caution and not consume parts of ornamental plants unless they are known to be edible.
To pets
Silver spear is not widely documented as being toxic to pets. There is limited information on the effects of Astelia chathamica, commonly referred to as silver spear, on domestic animals, and it is not commonly reported to cause poisoning in pets. As with any non-food plant, consumption should be discouraged, as individual pets may have sensitivities or allergic reactions. If your pet consumes a significant amount of the plant and shows signs of distress, consulting a veterinarian is recommended.
CharacteristicsLife cycle
Perennials
Foliage type
Evergreen
Color of leaves
Silver-green
Flower color
Varies
Height
3-4 feet (0.9-1.2 meters)
Spread
2-3 feet (0.6-0.9 meters)
Plant type
Shrub
Hardiness zones
8
Native area
New Zealand
Benefits
General Benefits- Landscape Design - Silver Spear (Astelia chathamica) provides a striking visual element to gardens with its silver-green, sword-like foliage.
- Erosion Control - The plant's robust root system can help stabilize soil and prevent erosion in garden landscapes.
- Drought Tolerance - Silver Spear is known for its ability to withstand periods of drought once established, making it suitable for xeriscaping.
- Minimal Maintenance - This plant generally requires little maintenance, making it an ideal choice for low-maintenance gardens.
- Coastal Conditions - It is tolerant of salty winds and can be planted in coastal areas.
- Wildlife Habitat - Provides shelter and food for certain insects and birds, supporting biodiversity.
- Architectural Foliage - Its unique form can be used to create architectural interest in landscapes.
- Container Gardening - Silver Spear is suitable for growing in containers, which is advantageous for patios, balconies, and small spaces.
Medical PropertiesThis plant is not used for medical purposes.
Air-purifying QualitiesThis plant is not specifically known for air purifying qualities.
Other Uses- Astelia chathamica, commonly known as Chatham Islands Astelia, can be used in floral arrangements due to its striking sword-like foliage, providing an exotic touch to bouquets and indoor plant arrangements.
- The fibers from the leaves of Chatham Islands Astelia can be woven into baskets and mats, showcasing traditional uses in handcrafts.
- The natural silver to grey coloration of the leaves may be included in garden color schemes that focus on a monochromatic or silver-themed landscape design.
- Chatham Islands Astelia can be used as a focal plant in rockeries or surrounded by smaller plants, where its architectural form can have a dramatic effect.
- In large public spaces and parks, this plant is used to create mass plantings for ground cover to limit soil erosion and suppress weed growth.
- Chatham Islands Astelia leaves are sometimes used in the craft industry to create natural wreaths and green decorations, especially around festive seasons.
- Its tough leaves can be used in mulching, providing a barrier against moisture loss and temperature fluctuations in garden beds.
- The plant's distinctive texture and form can be featured in photography and botanical art, illustrating the unique flora of the Chatham Islands.
- Chatham Islands Astelia is cultivated as a collector's plant among enthusiasts of rare or island-native species, contributing to horticultural diversity.
- The plant serves as a useful addition to coastal landscaping due to its tolerance of seaside conditions, helping to stabilize sand dunes and coastal ecosystems.
Interesting Facts
Feng ShuiThe Silver Spear is not used in Feng Shui practice.
Zodiac Sign CompitabilityThe Silver Spear is not used in astrology practice.
Plant Symbolism- Resilience: As a plant that thrives in harsh conditions of the Chatham Islands, Astelia chathamica, commonly known as Silver Spear, symbolizes resilience and the ability to endure tough environments.
- Unique Beauty: With its striking silver foliage, Silver Spear represents uniqueness and the beauty in standing out from the crowd.
- Protection: The tough, sword-like leaves of the Silver Spear plant can symbolize protection, suggesting a safeguard against challenges or negative forces.
- Adaptability: Silver Spear's capability to adapt to various soil types and environmental conditions mirrors the trait of adaptability in overcoming life's challenges.
WaterThe Silver Spear, or Astelia chathamica, prefers consistently moist soil without being waterlogged. Water it thoroughly, allowing the water to reach deep into the root zone. It's best to use around 1 gallon of water every week, adjusting for rainfall and temperature, as these plants prefer a bit more moisture than drought. During the growing season in spring and summer, ensure that the Silver Spear receives enough water to sustain its lush foliage, but reduce watering in the winter to prevent root rot. It's important to not let the plant sit in standing water, so good drainage is essential.
LightSilver Spear thrives best in a spot with bright, indirect light or partial shade. Avoid exposing it to full, direct sunlight for long periods, as this can scorch the leaves. A location that offers morning light with afternoon shade or dappled sunlight throughout the day is ideal for maintaining the vibrant foliage of the Silver Spear.
TemperatureSilver Spear, or Astelia chathamica, can tolerate a range of temperatures but prefers cooler conditions. The ideal temperature range is between 50°F and 75°F. It can withstand brief periods of temperatures as low as 20°F, but sustained cold can damage the plant. Keep it protected from hot temperatures above 80°F, as excessive heat can harm the Silver Spear.
PruningPruning the Silver Spear is generally done to remove dead or damaged foliage and to maintain its attractive form. Prune sparingly, as the plant has a naturally appealing shape. The best time for pruning is in the spring before the new growth begins. Remove only the necessary leaves or stems, and ensure not to cut the healthy, silver foliage unless it is overcrowded. Pruning once a year or as needed should suffice to keep the Silver Spear looking its best.
CleaningAs needed
SoilSilver Sword thrives best in well-draining soil with a mix rich in organic matter. A peat-based mix with added perlite or pumice enhances drainage. Aim for a soil pH between 6.0 and 7.5 for optimal growth.
RepottingSilver Sword typically requires repotting every 2 to 3 years. It's best to repot in spring or early summer, using a slightly larger pot to accommodate root growth.
Humidity & MistingSilver Sword prefers moderate to high humidity levels, ideally between 60% and 80% for optimal growth.
Suitable locationsIndoor
Keep in bright, indirect light and away from cold drafts.
Outdoor
Provide partial shade; shelter from strong winds.
Hardiness zone
8-11 USDA
Life cycleChatham Island Astelia begins its life cycle as a seed, which germinates in a suitable environment with moist, well-draining soil. The seedling stage follows, where the plant develops its first leaves and root system. As it enters the juvenile stage, Chatham Island Astelia grows taller and produces more robust, strap-like foliage, which is a characteristic feature of the plant. Upon reaching maturity, the adult plant produces flowers that are generally unisexual, with separate male and female plants. After pollination, typically involving birds or wind, the female plants produce berries, each containing seeds which, when dispersed, complete the cycle by giving rise to new seedlings. This perennial plant may live for many years, continuing to grow and reproduce in its native habitat.
PropogationPropogation time
Spring-summer
The Chatham Island Astelia, known as Astelia chathamica, is most commonly propagated by dividing its rhizomes or clumps, which is a straightforward and effective method for this plant. The ideal time for dividing and propagating Chatham Island Astelia is during spring, just as the plant emerges from dormancy and begins active growth, ensuring the divisions have a full growing season to establish. To propagate, the parent plant should carefully be lifted from the soil, and using a sharp, clean knife or spade, sections of the plant with healthy roots are separated. Each section should have a portion of the rhizome and a few leaf fans. The new divisions are then planted in a well-draining potting mix or directly into a similarly prepared garden site, ideally spaced about 18 inches (approximately 45 centimeters) apart to allow for growth. After planting, the divisions should be watered thoroughly and kept moist, but not waterlogged, as they establish themselves in their new locations.
