Lima Bean (Phaseolus lunatus)

Lima Bean

Phaseolus lunatus

Plump pods hold creamy edible seeds, a staple of home gardens. Annual legume; common names: lima bean, butter bean.

Full sun
2–3/week
Beginner
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Plant Needs

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Sunlight Full sun to partial shade; requires at least 6 hours of direct daily sun for optimal pod production
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Watering Keep soil consistently moist during growing season; avoid waterlogging to prevent root rot
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Temperature Thrives in warm temperatures; frost-tender, so avoid exposure to temperatures below 10°C
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Characteristics

  • Leaf: Trifoliate compound leaves with ovate leaflets and smooth margins
  • Flower: Small, white or pale lavender pea-like flowers in axillary racemes
  • Pod: Flat, curved pods containing 2–4 kidney-shaped edible seeds
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Care Guide

Watering

Keep soil evenly moist; water deeply when top 2 cm of soil is dry

Fertilization

Apply balanced compost at planting time. Avoid high-nitrogen fertilizers to prevent excessive foliage growth over pod production

Composted banana peel tea:Steep fully composted banana peels in water for 3 days; dilute 1:20 for root drench to enhance flowering and pod set without introducing pests or odors
Pruning
  • Pinch back climbing varieties to encourage bushier growth and increase flower production
  • Remove yellowing or diseased leaves to improve airflow and reduce disease risk
  • Trim spent flower clusters to redirect plant energy to developing pods
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Non-toxic to cats; no known adverse effects from ingestion

Humans: Cooked seeds are safe for human consumption; raw seeds contain mild lectins that are neutralized by proper cooking

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Garden Uses & Culture

Culture: Symbolizes sustenance and home gardening heritage in many North American and Latin American communities

Usage: Edible seeds for culinary use; nitrogen-fixing cover crop to improve soil fertility