How to Grow Copper Comet Lomandra
iNaturalist
Copper Comet Lomandra
Lomandra cylindrica
grassLomandra cylindrica is a tough, evergreen ornamental grass native to Australia that forms dense clumps of narrow, strappy foliage with copper-bronze tones, especially in cooler months. This low-maintenance perennial produces small yellow-green flowers on tall spikes and is highly valued for landscaping in arid and Mediterranean climates. It thrives in poor soils and requires minimal water once established, making it an excellent choice for water-wise gardens.
When should you plant Copper Comet Lomandra in your zone?
Get a personalized planting timeline — when to start seeds, transplant, and harvest — based on your USDA zone and local frost dates. Free to start.
Example Copper Comet Lomandra timeline · Pittsburgh, PA (Zone 6b)
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Plant Copper Comet Lomandra
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 Copper Comet Lomandra
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 9-11; frost-tolerant to about 20°F (-7°C)
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Get my Copper Comet Lomandra timeline →Growth Stages
Establishment
6-12 weeksSmall rooted plant or division; basal foliage emerges with minimal height growth
Water regularly to settle roots and promote establishment; mulch lightly around base; protect from extreme heat in first season
Vegetative Growth
3-6 monthsClumps expand with dense, narrow, strap-like leaves; foliage develops copper-bronze coloring, especially in winter
Minimal fertilizer needed; allow natural shape to develop; remove dead leaves if desired for tidiness
Flowering
4-8 weeksTall spikes (12-18 inches) with small yellow-green flowers emerge above foliage in spring to early summer
Flowers appear naturally; no special care required; allow flowers to persist for ornamental interest if desired
Seed Development & Maturity
Ongoing after first yearFlowers fade to seed heads; plant reaches full mature size and form; foliage density and color stability achieved
Can leave seed heads for birds and ornamental appeal; no deadheading required; established plants are fully drought-tolerant
Dormancy/Winter
3-4 monthsFoliage remains evergreen but may deepen in copper-bronze color during cool months; minimal visible growth
No watering or care needed in most climates; extremely frost-tolerant for zones 9+; no fertilizer required
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Spray with horticultural oil or insecticidal soap if severe; generally not a major issue on established plants
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Improve drainage; avoid overwatering; ensure soil is very well-draining; remove affected plants if necessary
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Ensure good air circulation; water at base only; remove affected leaves; fungicide spray only if severe
Uses
Water-Wise Landscaping
LandscapeLomandra cylindrica is exceptionally drought-tolerant and requires no supplemental watering once established, making it ideal for xeriscaping, Mediterranean gardens, and water conservation landscapes in arid regions. [source]
Foliage Color & Texture
OrnamentalThe narrow, strappy copper-bronze foliage provides striking seasonal color contrast and fine texture in garden beds, borders, and mixed plantings, adding visual interest year-round. [source]
Bird & Pollinator Support
WildlifeThe small yellow-green flowers attract pollinators in spring, and seed heads provide food for native birds; the dense foliage offers shelter for beneficial insects. [source]
Cut Flower Arrangements
HouseholdSeed heads and dried flower spikes can be harvested and used in floral arrangements, dried bouquets, and craft projects for long-lasting botanical interest. [source]
Slope & Erosion Control
PracticalThe dense, spreading root system and tough foliage make Lomandra excellent for stabilizing slopes, preventing erosion, and establishing naturalistic drifts in difficult-to-water landscape areas. [source]
Harvest Tips
Not typically harvested; this is an ornamental grass grown for landscaping. Seed heads can be cut for floral arrangements in summer. Prune dead or damaged foliage in late winter or early spring if desired for appearance.
Fun Facts
- 🌱 Lomandra cylindrica is native to southeastern Australia and has been used by Aboriginal peoples for thousands of years; the genus name honors early botanists and explorers.
- 🌱 The common name 'Copper Comet' refers to the striking copper-bronze coloring that intensifies during cooler months, creating a dramatic seasonal color shift in the garden.
- 🌱 This plant is so drought-tolerant that it requires almost no supplemental water in Mediterranean climates and semi-arid regions once established, making it a favorite among water-conscious landscapers worldwide.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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