Cinnamomum cassia Seeds | Chinese Cinnamon
LATIN NAME: Cinnamomum cassia
COMMON NAME: Chinese Cinnamon, Cassia
Plant Profile
Chinese Cinnamon is a medium evergreen tree of the laurel family, native to the warm hill forests of southern China and neighbouring Southeast Asia, where it has been cultivated for its bark for well over two thousand years. The leaves are large, stiff and glossy, with three prominent veins running their length, and a broken leaf releases a hot, sweet, unmistakable smell. New flushes emerge reddish before hardening to deep green, and the small yellowish flowers appear in modest panicles that bees work quietly through late spring.
In cultivation around Guangxi and Guangdong it is grown as a short-rotation crop, cut and coppiced on cycles of a few years, but as a garden tree it forms a dense, rounded crown of about ten to fifteen metres. It wants heat and humidity and a deep soil, and it will not tolerate frost for long.
Science & Biotechnology
The bark is the commercial cassia of world trade, and its chemistry differs from Ceylon cinnamon in one decisive respect: it carries a much higher coumarin load, which is why food-safety authorities in Europe and North America set intake guidance for cassia specifically. The bark oil is dominated by cinnamaldehyde at seventy per cent or more, and pharmacological work on the polyphenol fraction, particularly on post-meal glucose handling, continues from laboratories on three continents. Botanically the species sits close to Cinnamomum loureiroi and allies, and the wild extent of genuinely native stock, as opposed to ancient plantations, is debated.
Chinese breeders maintain selected lines for bark thickness and oil yield, and seed from these orchards, rather than roadside trees, is what a serious grower wants.
Uses & Benefits
In the kitchen the rolled bark is the cassia of bakeries and braised dishes, and in Chinese medicine the dried inner bark, Rou Gui, is a foundational warming herb used by professionals for cold-pattern conditions; the twigs, Gui Zhi, are a separate drug from the same tree. Any medicinal use belongs with a qualified practitioner.
As a garden plant it is a bold, glossy evergreen for the warm conservatory or the frost-free subtropical garden, giving dense shade and a constant supply of aromatic leaves for cooking. The leaf litter breaks down slowly and makes a good, fragrant mulch under the tree itself. Bees and hoverflies work the flowers, and birds take the berries without spreading it aggressively.
Growing from Seed
Sow fresh seed, freed from the fruit pulp, into a deep, free-draining tropical mix and keep it at 22 to 27 °C; germination follows within three or four weeks and is best when the seed never dries out. Shade the seedlings from full sun for their first summer and keep the air moving to discourage fungal trouble.
Pot on regularly, because the species makes quick early root, and plant out only where winters stay frost-free, spacing trees at least six metres apart if bark is the goal. Coppicing from about the fourth year keeps the bark harvest coming and the crown manageable; mulch deeply after cutting and feed to push the regrowth.
Our Take
The cassia of the world’s kitchens, a bold glossy laurel for genuinely warm gardens. Grow it for the leaves, prune it for the bark, and keep it far from frost.
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