Perilla (shiso): description, cultivation, culinary uses and safety

Perilla is an annual herb in the mint family valued for aromatic leaves, seeds and oil. Known as shiso, kkaennip or tía tô, it occurs in green and purple forms and is used in East Asian cuisines and gardens.

Overview

Perilla is a group of annual aromatic plants in the mint family grown for its leaves, seeds and oil. Common names include shiso (Japan), kkaennip (Korea) and tía tô (Vietnam). Cultivated varieties range from bright green to deep reddish‑purple and are used for flavoring, garnishing and pickling. In many regions the plants readily self‑sow and can naturalize where winters are mild (mild climates).

Description and taxonomy

Perilla plants have the characteristic square stems and opposite leaves of Lamiaceae. Leaves are serrated, often slightly rounded, and may be smooth or gently crinkled. Small tubular flowers appear in clusters on terminal spikes. The cultivated taxa are commonly treated within the species Perilla frutescens and its varieties; gardeners often refer to the plant simply as an annual herb within the broader mint family.

Distribution and habitat

Native to East Asia, Perilla has long been cultivated in China, Korea and Japan and has spread to other temperate regions. It grows well in disturbed soils, garden beds and containers. Plants prefer a sunny to partially shaded site and will produce abundant seed if allowed to flower and set seed, facilitating local spread.

Cultivation

Perilla is usually grown from seed and adapts to a range of soils if drainage is adequate. Seedlings are started in spring after the last frost; plants mature quickly and are ready for leaf harvest in their first season. Gardeners choose between green and purple forms for differing flavors and ornamental effect. Leaves are best harvested before flowering for optimal aroma.

Culinary uses and varieties

Leaves are used fresh as garnishes, wrappers for rice and fish, chopped into salads, or added to soups and marinades. Red‑leaf varieties have traditional uses in coloring pickles and umeboshi (salted plums) in Japan. Seeds are roasted or pressed for oil, which is used as a culinary oil and condiment. Different regional cuisines favour particular preparations and cultivars.

Other uses

Perilla has uses beyond the kitchen: it is grown ornamentally for foliage color, used in some traditional medicines for aromatic properties, and its flowers can attract pollinators. The seed oil is a source of polyunsaturated fatty acids and is used in culinary and some industrial contexts.

Safety and precautions

While widely eaten by people, Perilla can be harmful to some livestock when consumed in quantity; ingestion has been associated with respiratory problems in cattle and other animals. Some individuals may experience allergic reactions to aromatic compounds in the leaves. As with any wild or garden plant, correct identification and moderate use are advised.

Identification and similar species

Perilla can be recognized by its square stem, opposite serrated leaves and spike‑like flower clusters. Leaves resemble stinging nettle in shape but are typically smoother and more aromatic. When foraging or sourcing plants for food, use reliable botanical references and seeds or plants from reputable suppliers (family overview).