Four-petal Pawpaw (Asimina tetramera)

Four-petal Pawpaw

Asimina tetramera

It bears delicate four-petal blooms and edible fruit, a quiet understory gem. Deciduous shrub; common name: Four-petal Pawpaw.

Partial sun
1–2/week
Moderate
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Plant Needs

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Sunlight Prefers dappled shade to partial sun; avoid intense midday sun in hot climates to prevent leaf scorch
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Watering Water deeply when the top 5 cm of soil feels dry; avoid waterlogging to prevent root rot
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Temperature Hardy to USDA zones 8–10; tolerates light frost but may suffer damage below -5°C
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Characteristics

  • Leaf: Simple oblong-lanceolate leaves, 10–20 cm long, glossy green above, pale green beneath
  • Flower: Four maroon to brownish-purple petals, 3–5 cm wide, with a faint, sweet fragrance
  • Fruit: Oblong yellow-green edible berries, 5–10 cm long when fully ripe
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Care Guide

Watering

Keep soil evenly moist during active growth; increase frequency during prolonged dry spells

Fertilization

Apply diluted balanced organic fertilizer once monthly. Avoid over-fertilizing, as excessive nitrogen can reduce flowering and fruiting

Banana peel compost tea:Compost banana peels for 2–3 weeks, steep in water for 24 hours, dilute 1:20 with water for root drenching to support fruiting
Pruning
  • Remove dead, damaged, or diseased branches in late winter before new growth emerges
  • Thin overcrowded stems to improve airflow and light penetration
  • Shape lightly after flowering to maintain a compact, multi-stemmed form
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Ingestion of seeds or unripe fruit may cause vomiting, diarrhea, and abdominal discomfort

Humans: Ripe fruit flesh is edible; seeds contain annonacin, which may cause mild gastrointestinal upset or neurotoxicity if ingested in large quantities

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Garden Uses & Culture

Culture: N/A

Usage: Edible ripe fruit for human consumption; ornamental understory shrub for woodland gardens