Annatto (Bixa orellana)

Annatto

Bixa orellana

Its red seeds dye food and culture, a living pigment factory. Evergreen tropical shrub or small tree; common names: annatto, lipstick tree.

Full sun
2–3/week
Moderate
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Plant Needs

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Sunlight Full sun to partial shade; tolerates dappled sunlight in tropical understories; avoid prolonged intense midday sun for potted plants
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Watering Water thoroughly when the top 2–3 cm of soil dries out; avoid waterlogging to prevent root rot
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Temperature Thrives in warm tropical temperatures; cannot tolerate frost below 10°C, requiring indoor protection in cool climates
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Characteristics

  • Leaf: Broad, heart-shaped, glossy green leaves up to 20 cm long
  • Flower: Pale pink to white five-petaled flowers with yellow stamens
  • Fruit: Spiny, reddish-brown seed pods containing bright red aril-coated seeds
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Care Guide

Watering

Keep soil consistently moist but not soggy; increase frequency during hot, dry spells

Fertilization

Apply balanced diluted liquid fertilizer every 2 weeks. Avoid over-fertilizing to prevent excessive foliage growth at the expense of flowering and fruiting

Banana peel tea:Soak chopped banana peels in water for 3 days; dilute the mixture 1:10 before applying as a root drench to avoid nutrient burn
Pruning
  • Remove dead or damaged branches in early spring to improve airflow and plant health
  • Shape the shrub to control size and encourage bushier growth, trimming back overgrown stems
  • Trim spent flower heads after blooming to promote potential secondary flowering
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Non-toxic to cats

Humans: No known toxic effects for humans when used as intended

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Garden Uses & Culture

Culture: Red seed arils used as natural food coloring and traditional body paint in Indigenous South American cultures

Usage: Natural food colorant (for cheese, butter, and baked goods), cosmetic pigment, and traditional medicinal applications