Costa Rican Guava (Psidium friedrichsthalianum)

Costa Rican Guava

Psidium friedrichsthalianum

Its fragrant white blooms precede tart, berry-like fruits. Evergreen small tree; common names: Costa Rican guava, wild guava.

Full sun
1–2/week
Beginner
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Plant Needs

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Sunlight Full sun to partial shade; tolerates mild afternoon shade in hot, arid climates
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Watering Water deeply when the top 5 cm of soil is dry; avoid standing water to prevent root rot
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Temperature Thrives in warm temperate to tropical temperatures; protect from frost below 10°C
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Characteristics

  • Leaf: Oval, glossy dark green leaves with aromatic oil glands when crushed
  • Flower: Fragrant white five-petaled blooms with prominent yellow stamens
  • Fruit: Round, red to purple berry-like fruits with tart, edible flesh
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Care Guide

Watering

Keep soil consistently moist but not waterlogged

Fertilization

Feed monthly with balanced, diluted fertilizer. Avoid over-fertilizing to prevent excessive foliage growth at the expense of fruiting

Banana peel compost tea:Compost banana peels for 2–3 weeks, steep in water for 24 hours, dilute 1:20 for root drench; discard solid peels to avoid odor and pest attraction
Pruning
  • Prune in late winter to shape the tree and remove dead or damaged branches
  • Thin crowded inner growth to improve air circulation and light penetration
  • Remove low-growing suckers to maintain a single-trunk tree form
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA-aligned: Non-toxic to cats; no adverse effects reported

Humans: No known toxic effects from ingestion or contact

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Garden Uses & Culture

Culture: N/A

Usage: Edible tart fruits, ornamental landscaping, pollinator support