Long-spined acacia (Acacia macracantha)

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Sunlight Requires full sun exposure for optimal growth and flowering; tolerates intense desert sunlight and brief periods of partial shade

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Watering Drought-tolerant; water deeply but infrequently, allowing the soil to fully dry out between waterings to prevent root rot

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Temperature Thrives in warm to hot temperatures; can tolerate brief light frosts down to 10°C but may suffer damage below this threshold

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Leaf: Bipinnate, feathery bright green leaflets; young growth may be sensitive to touch
Flower: Round, fluffy yellow globular inflorescences with a sweet, subtle scent
Stem/Bark: Gray-brown textured bark; paired sharp white spines up to 10 cm long at leaf nodes

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Watering

Water deeply once weekly during active growth to support flowering and foliage development

Fertilization

Apply diluted low-nitrogen liquid feed once monthly. Avoid over-fertilization, as excessive nitrogen can promote weak, leggy growth

Eggshell powder topdress：Crush dried eggshells into fine powder and sprinkle lightly on soil surface; water in gently to release nutrients over time

Pruning

Trim dead, damaged, or crossing branches in late winter to maintain a compact, rounded shape
Remove suckers growing from the base to prevent overcrowding and preserve the plant's form
Avoid pruning during active flowering to preserve the yellow globular blooms for pollinators

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Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Non-toxic to cats

Humans: Ingestion of large quantities of seeds may cause mild gastrointestinal upset

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Culture: Symbolizes resilience and adaptability in arid landscapes

Usage: Ornamental hedge for security; provides shelter and food for desert wildlife; nitrogen-fixing species that improves soil fertility