Lemon Bottlebrush (Callistemon citrinus)

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Sunlight Full sun to partial shade; requires at least 6 hours of direct sunlight weekly for abundant flowering

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Watering Water deeply when the top 5 cm of soil is dry; drought-tolerant once established, avoid overwatering

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Temperature Hardy to light frosts (0°C); thrives in warm temperate to subtropical temperature ranges

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Leaf: Narrow lanceolate leaves with a glossy green surface, releasing a lemon scent when crushed
Flower: Dense cylindrical spikes (8–15 cm long) composed of bright red stamens, resembling traditional bottle brushes
Stem: Woody branching stems with peeling, papery brown bark on mature specimens

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Watering

Keep soil evenly moist during active growth; apply mulch to retain moisture

Fertilization

Apply balanced slow-release fertilizer once monthly. Avoid high-nitrogen fertilizers to prevent excessive foliage growth over flowering

Banana peel compost tea：Compost banana peels for 2–3 weeks, steep in water for 3 days, dilute 1:20 for root drench to avoid nutrient burn

Pruning

Deadhead spent flower spikes immediately after blooming to encourage repeat flowering
Thin overcrowded branches in late winter to improve airflow and light penetration
Shape lightly after flowering to maintain a compact, rounded form
Remove damaged or diseased stems at any time to promote plant health

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Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA-verified non-toxic; no adverse effects expected from ingestion

Humans: No documented toxic effects for humans; leaves may be used in mild herbal infusions in small quantities

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Culture: Symbolizes resilience and vibrant energy in Australian native garden design

Usage: Ornamental garden shrub; cut flower spikes for floral arrangements; aromatic leaves for mild herbal infusions