Shiso (Perilla frutescens var. crispa)

Shiso

Perilla frutescens var. crispa

Its ruffled leaves carry herbaceous brightness and culinary warmth. Aromatic annual herb; common name: shiso, beefsteak plant.

Partial sun
2–3/week
Beginner
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Plant Needs

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Sunlight Bright indirect to partial direct sun; avoid harsh midday sun to prevent leaf scorching; tolerates light shade
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Watering Water when the top 2 cm of soil feels dry; avoid overwatering to prevent root rot
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Temperature Thrives in 15–25℃; sensitive to frost, so move indoor if temperatures drop below 10℃
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Characteristics

  • Leaf: Ruffled, ovate leaves with purple or green color; aromatic when crushed
  • Flower: Small, pale purple to white whorled blooms on terminal spikes
  • Stem: Square, hairy stems matching leaf color (green or purple)
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Care Guide

Watering

Keep soil consistently moist but not waterlogged; water deeply when topsoil dries

Fertilization

Diluted balanced liquid feed every 2 weeks. Avoid over-fertilizing to prevent leggy growth and reduced leaf aroma

Banana peel compost tea:Soak fully composted banana peels in water for 24 hours; dilute 1:20 for root drench to support healthy leaf development
Pruning
  • Pinch back growing tips when plants reach 15 cm tall to encourage bushier growth
  • Remove spent flower spikes to redirect energy to leaf production
  • Trim yellowing or damaged leaves to maintain plant health and airflow
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Toxic; ingestion may cause vomiting, depression, difficulty breathing, and tremors

Humans: No significant toxicity in typical culinary use; rare mild allergic reactions may occur in sensitive individuals

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Garden Uses & Culture

Culture: Used in Japanese, Korean, and Chinese cuisines; symbolizes vitality in some East Asian cultural traditions

Usage: Culinary herb (leaves for wraps, garnishes, pickling); ornamental foliage for garden borders