How to Grow Spike Cordyline
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Spike Cordyline
Cordyline australis
shrubSpike cordyline is a striking evergreen shrub or small tree native to New Zealand, known for its long, narrow, sword-like leaves that grow in dense rosettes. It produces fragrant white or cream-colored flowers in late spring or early summer, followed by small white or blue berries. Popular as an ornamental plant for adding architectural interest and vertical accent to gardens and landscapes.
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Example Spike Cordyline timeline · Pittsburgh, PA (Zone 6b)
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Plant Spike Cordyline
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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Harvest Spike Cordyline
Late summer into fallBefore the first fall frost (≈ Nov 8)
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Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 9b-11; can be grown in containers and brought indoors in colder zones
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Get my Spike Cordyline timeline →Growth Stages
Establishment
3-6 monthsYoung plant develops root system with few leaves, establishing baseline rosette structure
Water regularly to keep soil moist but not waterlogged. Protect from harsh winds. Keep in bright, indirect light if potted.
Vegetative Growth
1-2 yearsPlant produces increasingly dense foliage with sword-like leaves growing upward and outward from center; height increases steadily
Maintain consistent moisture and provide full sun. Feed monthly during growing season with balanced, dilute fertilizer. Remove any dead or damaged leaves.
Pre-flowering
2-4 monthsPlant reaches mature size with thick rosette crown; flower buds begin to form at center
Continue regular feeding. Ensure adequate sunlight to promote flowering. Maintain good drainage to prevent root rot.
Flowering
4-6 weeksTall flowering spike emerges from center with fragrant white, cream, or pale yellow small flowers in dense clusters
Do not disturb flowering spike. Continue regular watering and feeding. Provide support if needed in windy locations.
Fruiting & Maturity
Ongoing; berries persist for monthsSmall berries develop along flower spike, turning white, blue, or purple depending on variety. Plant continues to grow and produce new leaves
After flowering, can remove spent flower spike or leave for continued interest. Seeds may self-sow if berries drop. Maintain shape with light pruning if desired.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Spray with water to dislodge; use miticide if severe. Increase humidity around plant.
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Remove with cotton swab dipped in alcohol. Apply insecticidal soap or neem oil for heavy infestations.
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Scrape off manually or treat with horticultural oil spray during dormant season.
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Improve air circulation. Remove affected leaves. Avoid overhead watering. Apply fungicide if necessary.
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Ensure excellent drainage and avoid overwatering. Use well-draining soil. Remove affected plants if severely diseased.
Uses
Architectural Landscape Accent
OrnamentalSpike cordyline's distinctive vertical form and bold foliage create dramatic focal points in gardens, mixed borders, and contemporary landscapes. Especially valued for modern and Mediterranean garden designs. [source]
Container & Indoor Plant
HouseholdExcellent for large pots on patios, decks, and indoors in bright locations. Can be moved indoors for winter protection in cold climates, making it versatile for any region. [source]
Bird & Pollinator Support
WildlifeFragrant flowers attract bees and other pollinators in late spring. Berries provide food for birds and wildlife in fall and winter. [source]
Floral Arrangements & Foliage
CraftLong, graceful leaves are used by florists as exotic foliage in cut flower arrangements and tropical-themed designs. Dramatic texture and height add visual interest. [source]
Traditional & Spiritual Significance
CulturalCordyline australis holds cultural importance to New Zealand's indigenous Māori people, historically used for food, fiber, and ceremonial purposes. Grown as a symbol of heritage. [source]
Harvest Tips
Spike cordyline is not harvested for crop purposes; however, berries can be allowed to mature and drop naturally for seed dispersal. Foliage can be pruned at any time to remove dead or damaged leaves or to shape the plant. Cut at an angle just above leaf nodes.
Fun Facts
- 🌱 Spike cordyline is native to New Zealand and is sometimes called 'cabbage tree' because its crown of leaves resembles a cabbage when viewed from above.
- 🌱 The plant can live for 50+ years in ideal conditions and can eventually reach heights of 30-40 feet in its native habitat, though ornamental plants are typically much smaller.
- 🌱 Each flowering stem only flowers once, then dies back, but the plant continues to grow new rosettes, allowing it to reflower from new stems over many years.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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