Sweet Acacia (Acacia farnesiana)

Sweet Acacia

Acacia farnesiana

Fragrant golden blooms cluster like sunny pom-poms, a drought-tough ornamental shrub. Common names: Sweet Acacia, Huisache.

Full sun
1/week
Beginner
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Plant Needs

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Sunlight Full sun is preferred for abundant flowering; tolerates partial shade but may reduce bloom production
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Watering Drought-tolerant; water deeply and infrequently, allowing soil to dry completely between waterings to avoid root rot
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Temperature Hardy to 5°C; avoid prolonged frost exposure; thrives in warm, arid or semi-arid climates
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Characteristics

  • Leaf: Bipinnate, small oval leaflets, bright green, fern-like appearance
  • Flower: Round, golden yellow, fragrant pom-pom clusters with numerous stamens
  • Stem/Bark: Armed with sharp paired thorns; gray-brown rough bark with age
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Care Guide

Watering

Water deeply every 1–2 weeks; avoid overwatering to prevent root rot

Fertilization

Apply diluted balanced liquid fertilizer once monthly. Avoid over-fertilizing, as it can lead to excessive foliage growth at the expense of blooms

Banana peel compost tea:Use fully composted banana peels steeped in water for 24 hours; dilute 1:20 for root drenching to avoid nutrient burn and pest attraction
Pruning
  • Prune immediately after flowering to maintain compact shape and remove dead or damaged branches
  • Trim back overgrown stems to encourage bushier growth and increase bloom production the following season
  • Wear thick gloves to avoid thorn injuries; remove suckers to prevent unwanted spreading
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Toxic; ingestion may cause vomiting, diarrhea, lethargy, and reduced appetite

Humans: Contains tannins; ingestion causes mild oral irritation and stomach upset; thorn punctures may lead to localized pain or infection

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Garden Uses & Culture

Culture: Symbolizes resilience in arid landscapes; used in traditional folk medicine for fragrance and mild anti-inflammatory remedies

Usage: Ornamental landscaping; fragrant flowers used in perfumery and potpourri; wood used for small craft projects