Cinnamomum kotoense Seeds | Koto Cinnamon

Koto Cinnamon (Cinnamomum kotoense) with large glossy three-veined leaves on a compact evergreen tree — Koto Cinnamon (*Cinnamomum kotoense*): Lauraceae, the glossy island laurel behind China’s potted pingan shu.

LATIN NAME: Cinnamomum kotoense

COMMON NAME: Koto Cinnamon

Plant Profile

The Koto Cinnamon is a compact evergreen tree of the laurel family, native to Lanyu or Botel Tobago, the small island off southeastern Taiwan whose old Japanese name, Koto, the species carries. It grows six to ten metres in the island’s warm, humid forest, with large, glossy, strongly three-veined leaves held densely on upright stems, and a crushed leaf releases a clean, spicy-sweet scent. The small cream flowers open in spring, and dark fruits follow in the warm months for the island’s fruit-eating birds.

On the island it is a genuinely local tree; in mainland Chinese horticulture it is one of the most familiar foliage plants in the country, sold in millions of pots under the name pingan shu, the peace tree, and kept on windowsills and in courtyards from Beijing to Guangzhou.

Science & Biotechnology

The species is endemic to a single small island, which makes its wild populations a conservation concern in the standard sense: limited area, limited numbers, and a total dependence on the island’s warm, humid forest. Its garden fame runs in the opposite direction, since the potted trade has propagated it in enormous numbers, and botanical papers have noted the odd position of a narrow island endemic turned mass-market houseplant. Its leaf oil chemistry has been analysed in Taiwanese surveys of the island’s laurels, and its place within Cinnamomum has been tested in the molecular revisions that have reshaped the genus.

For the grower, the practical science is straightforward: it is a warm, humid-forest plant that tolerates the dry air of a heated room better than most of its family, which is precisely why the pot trade adopted it.

Uses & Benefits

As a houseplant and patio plant it is a polished performer: dense, glossy, slow enough to stay manageable, tolerant of indoor air, and scented when the leaves are brushed. Outdoors in genuinely warm, humid climates it makes a small, handsome evergreen tree for a sheltered courtyard or a shaded border.

It is an ornamental, not a spice: the bark has no commercial cinnamon value, and the plant’s virtues are foliage, form and scent. In its island home it belongs to the forest community rather than to any use tradition, and its main human service has been as a pot on a million windowsills.

Growing from Seed

Sow fresh seed, cleaned of pulp, into a humus-rich, free-draining mix and hold it at 22 to 26 °C with even moisture and bright, indirect light; germination follows within four to eight weeks. Pot the seedlings on individually as they fill the container, keeping the air humid while they are young.

Indoors, give it bright filtered light, let the compost dry slightly at the surface between waterings, and keep it away from cold draughts and hot radiators. Outdoors in frost-free climates, plant into rich, moist, well-drained ground in part shade. Feed little and often in the growing season, and wipe the leaves occasionally to keep the gloss.

Our Take

The peace tree of a million windowsills, and a narrow island endemic in the wild: glossy, scented, unfussy. An evergreen that behaves indoors better than any cousin it has.

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