Azure Sweet Pea (Lathyrus azureus)

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Sunlight Requires 6–8 hours of direct sunlight daily for optimal blooming; tolerate partial shade in hot afternoon conditions

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Watering Water deeply when the top 2 cm of soil feels dry; avoid overwatering to prevent root rot

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Temperature Thrives in cool temperate conditions; avoid prolonged exposure to temperatures above 28°C

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Leaf: Paired oval leaflets with curling tendrils for climbing; bright green, smooth texture
Flower: Clusters of 2–5 vivid azure-blue, pea-like blooms with a sweet fragrance
Stem: Slender, herbaceous stems that twine around supports

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Watering

Keep soil consistently moist during active growth; water early in the day to reduce fungal disease risk

Fertilization

Apply diluted balanced liquid fertilizer every 2 weeks. Avoid over-fertilization to prevent excessive foliage growth at the expense of blooms

Composted banana peel tea：Steep fully composted banana peels in water for 24 hours; dilute 1:20 for root drenching to avoid nutrient burn

Pruning

Pinch back young shoots when 10 cm tall to encourage bushier growth and more flower clusters
Remove spent blooms regularly to extend the flowering period
Trim tangled or overcrowded stems to improve airflow and maintain climbing structure

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Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Toxic; ingestion of large quantities of seeds may cause tremors, weakness, or seizures

Humans: Only seeds contain lathyrogens; ingestion of raw/undercooked seeds may cause muscle weakness or paralysis

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Culture: Symbolizes blissful pleasure and farewell in Victorian floriography

Usage: Ornamental garden climber; fragrant cut flower for floral arrangements