Cinnamon the true bark, not cassia

01Overview

What is cinnamon?

Cinnamon is, quite literally, bark — the dried inner bark of small evergreen trees in the laurel family. But the word 'cinnamon' hides a split personality, and getting it right is the whole point of this page. 'True' cinnamon is Cinnamomum verum (older name C. zeylanicum), also called Ceylon cinnamon: pale tan, paper-thin, rolled into brittle quills made of many fine layers, with a sweet, floral, almost citrusy fragrance and a gentle taste. 'Cassia' is the catch-all name for several cheaper relatives — chiefly Cinnamomum cassia (Chinese), C. burmannii (Indonesian / Korintje) and C. loureiroi (Saigon / Vietnamese) — whose bark is thicker, harder, redder-brown and curls into a single tight scroll. Cassia tastes stronger and more pungent. It is also far higher in coumarin, a naturally occurring compound that can stress the liver in large, regular doses. Most 'cinnamon' sold in supermarkets, especially in North America, is actually cassia.

We make this distinction first because it is the most useful thing we can tell you, and because it is where AroWest stands. We grow true cinnamon — Cinnamomum verum — not cassia. And unlike many spices we have to be honest about importing or adopting, this one is genuinely at home here: C. verum is native to Sri Lanka and the Western Ghats of South India, the very forest country we farm. So when we talk about cinnamon, we mean the real, low-coumarin, multi-layered bark, grown where it belongs.

02History & origin

From the cinnamon-bird legend to the wars over Ceylon's bark

Cinnamon is one of the most ancient spices in the written record. The Egyptians prized it for embalming and perfumery well before 1000 BCE, and it appears repeatedly in the Hebrew Bible as a precious aromatic. For most of antiquity its true source — the island we now call Sri Lanka, plus the Malabar coast — was a closely guarded secret kept by the Arab and Indian middlemen who controlled the trade into the Mediterranean.

To protect that monopoly, traders spun magnificent disinformation. The Greek historian Herodotus, writing in the 5th century BCE, repeated a tale that cinnamon sticks were gathered by giant 'cinnamon birds' that built their nests from the bark on inaccessible cliffs, and that merchants tricked the birds into dropping it. The story was nonsense — but it kept buyers from ever asking where the spice actually grew, and astonishingly it was still being retold in Europe many centuries later.

The secret broke in the early 1500s, when the Portuguese reached Ceylon and Europe finally connected with the source. The Portuguese took control of the cinnamon trade; the Dutch East India Company ousted them by 1658 and ran a famously harsh monopoly over Ceylon's bark, even controlling the peeler community; and the British seized the island in 1796. Few spices have had more blood and empire spilled over them. The English word itself travelled the same trade routes: 'cinnamon' descends from Greek kinnámōmon, which entered Greek from a Semitic (Phoenician/Hebrew) source.

03Origin & terroir

A spice that really is native to our hills

With most spices we sell, we have to be careful and honest: clove and nutmeg are Indonesian, chilli came from the Americas. Cinnamon is the rare case where the romantic origin story and the truthful one are identical. Cinnamomum verum is genuinely native to Sri Lanka and the Western Ghats / Malabar tract of South India — the same Western Ghats biodiversity hotspot where AroWest farms, in Udumbanchola, Idukki. This is not adopted heritage. It is home ground.

Sri Lanka remains the spiritual and commercial heart of true cinnamon, growing an estimated 80–90% of the world's genuine Ceylon bark, and 'Ceylon cinnamon' even carries Sri Lanka's Geographical Indication. But the species crosses the narrow strait into India, and it is cultivated on a small scale in the lower Western Ghats of Kerala, as a rainfed crop that thrives on the heavy monsoon rain these slopes receive. India's spices research institute, ICAR–IISR in Kozhikode, has even bred improved C. verum varieties — Navashree and Nithyashree — selected for high bark-oil and cinnamaldehyde content.

The honest caveat is about scale, not origin. India is a modest grower of true cinnamon — the Spices Board notes it is grown in only one or two pockets of Kerala — and a large importer of cassia for its mass market; the bulk of the world's 'cinnamon' tonnage is cassia from China, Vietnam and Indonesia. So the AroWest angle is simple and true: we grow the real species, the one these forests gave the world, in the hills it is native to — not the cheaper cassia that wears its name.

“For once we don't have to soften the provenance. True cinnamon is native to the Western Ghats — these are its own hills.”

04Research & trade

Who grows & protects true cinnamon

True cinnamon is native to this region, and India’s spice institutes work to keep real Cinnamomum verum distinct from the cheaper cassia sold as “cinnamon”.

Sources: ICAR–IISR (Kozhikode), the Spices Board and Kerala Agricultural University — see references.

05Botany & cultivation

How & where it grows

Cinnamomum verum is a small evergreen tree of the laurel family (Lauraceae), kin to bay laurel, avocado and camphor. Left wild it can reach 10–15 metres, but in cultivation it is deliberately kept low and coppiced — cut back hard so it throws up a thicket of straight, slender shoots, because those young shoots give the finest bark.

The leaves are leathery, ovate-oblong and 7–18 cm long, glossy dark green above and prominently three-veined; crushed, they smell warmly of clove because the leaf oil is rich in eugenol. The small greenish-yellow flowers grow in panicles and are not pleasantly scented; they ripen into dark purple, single-seeded drupes.

Crucially, the spice is not the woody trunk bark — it is the thin inner bark (the phloem layer) of those young coppiced shoots. This is what makes true cinnamon so labour-intensive and so distinctive: it can only be harvested by skilled hand-peeling, not stripped in slabs.

Cinnamon is hardy and tolerant of many soils, thriving from near sea level up into the lower hills as a rainfed crop in high-rainfall tropics. Trees are typically first harvested a few years after planting and, once established, a coppiced cinnamon garden can be productive for many decades.

Harvest is a craft. After a rainy spell, when the bark slips easily, peelers cut the young shoots, scrape off the rough outer bark, then carefully ease off the inner bark in long ribbons using a special rod and curved brass knife. As the strips dry over several days they curl inward and nest inside one another, forming the slim, multi-layered quills that are the signature of genuine Ceylon cinnamon — and the single clearest way to tell it from cassia's one hard scroll.

06Cultivation & agronomy

How it's grown

True cinnamon (Cinnamomum verum) is a small evergreen tree grown for the thin inner bark of its young shoots. In India it is cultivated on a modest scale in the lower Western Ghats of Kerala and Tamil Nadu as a hardy, largely rainfed crop. Trees are deliberately kept low and coppiced so they throw up a thicket of straight, slender shoots, because young shoots give the finest, most easily peeled bark.

Crop calendar

In the field

• Spacing: Plant at roughly 2 x 2 m to 3 x 3 m (about 1,100-2,500 plants/ha), giving denser stands where coppicing for bark is the goal. Closer spacing favours slender shoots; wider spacing suits intercropping.
• Coppicing & training: The defining practice: after establishment, cut plants back hard to encourage a low clump of many straight, pencil-to-thumb-thick shoots, which carry the prime peelable inner bark. Re-coppice managed stools to keep shoots young.
• Shade & intercropping: Young plants benefit from light shade for the first year or two; once established, cinnamon tolerates open sun. It fits well into Western Ghats homestead gardens and can be intercropped with arecanut, coconut or other tree spices.
• Mulching & weeding: Mulch the basins with leaf litter or crop residue to conserve monsoon moisture, suppress weeds and feed soil organic matter. Keep the base weed-free, especially in the first two years.
• Irrigation & drainage: Largely rainfed in high-rainfall tracts; supplemental irrigation in the dry months can improve shoot vigour in drier areas. Ensure good drainage, as the crop will not stand waterlogging.

07Variety guide

Every variety, in depth

Cinnamon in India spans two botanical worlds: true cinnamon (Cinnamomum verum), the rare, delicate quill-spice prized for low coumarin and high cinnamaldehyde, thrives in Kerala's Western Ghats from ancient plantings in Kannur and Kottayam; and cassia—Chinese (C. cassia), Indonesian (C. burmannii), Vietnamese (C. loureiroi)—cheaper and peppery, now grown in commercial trials across hill stations. Here are 10 verified varieties and types farmers, processors and buyers should know: from ICAR-IISR released cultivars bred for robust yields, to Tamil Nadu's drought-tough selections and Kerala's oil-leaf specialists.

08Pests, diseases & disorders

What can go wrong

True cinnamon is a hardy tree spice and, grown in shaded Western Ghats homesteads, faces relatively few serious problems. The main threats are leaf-eating and shoot-boring insects plus a few foliar and root diseases, especially in nurseries and in poorly drained, humid plots. Favour an IPM approach - clean planting material, good drainage, phytosanitation and biocontrol - and turn to a registered chemical only when damage crosses the threshold, as per the local package of practices.

09Soil & fertiliser

Feeding the plant

Cinnamon is hardy and undemanding, but feeding lifts shoot vigour, bark recovery and oil content - especially because coppicing repeatedly removes biomass that the stool must regrow. Lean on organic matter (FYM/compost) as the base and add balanced NPK in line with soil status. These are general ranges; always confirm actual rates with a soil test and your local package of practices.

Common deficiencies & issues

• Nitrogen deficiency: Overall pale, yellowing older leaves and weak, thin shoots with slow regrowth after coppicing; correct with split organic + N feeding through the monsoon.
• Potassium deficiency: Scorching or browning along the margins and tips of older leaves and poor shoot sturdiness; common on light leached soils - add a potassium source after a soil test.
• Magnesium / micronutrient deficiency: Interveinal yellowing of leaves (veins stay green) on acidic, leached Ghats soils; address with FYM, balanced micronutrients and pH correction if a soil test indicates it.
• Low organic matter / poor soil: Generally stunted, low-vigour plants and weak coppice regrowth on poor lateritic or gravelly soils; the most common limit - fix with regular bulky organic manure and mulch.

10Grades & quality

The grades, decoded

Unlike pepper (graded by region) or clove (graded by how it was picked), true Ceylon cinnamon is graded mainly by the diameter of the rolled quill — and the rule is counter-intuitive: thinner is better. A fine quill means young, soft, fragrant inner bark and a more skilled peeler, so the slimmest grades command the highest price. Sri Lanka's national standard, SLS 81, formalises these grades along with limits on moisture, mould ('foxing'), pesticides and heavy metals. The grade letters and codes below follow that trade system.

Two things matter beyond the grade letter. First, structure: genuine Ceylon quills are thin, brittle and made of many fine layers nested together, so they crumble and grind easily; cassia is a hard, hollow single curl that resists a grinder. Second, freshness: good cinnamon is fragrant the moment you open the jar and pale-tan rather than dark red-brown. We sell true Cinnamomum verum graded by quill fineness — not cassia dressed up in cinnamon's name.

11Flavour & chemistry

What gives it that aroma

True cinnamon tastes the way it smells: sweet, warm and floral, with hints of citrus and clove and almost none of the harsh, biting heat people associate with cheap 'cinnamon.' That bite is largely a cassia trait. Ceylon's gentler profile is exactly why bakers and tea-makers who switch to it often say it tastes more like perfume than spice.

The headline compound is cinnamaldehyde (more precisely trans-cinnamaldehyde), which makes up roughly 50–63% of Ceylon cinnamon's bark essential oil and drives both the aroma and most of the spice's studied biological activity. (In cassia, cinnamaldehyde runs even higher — around 69% — which is part of why cassia tastes more aggressive.)

Two supporting players round out true cinnamon's elegance: eugenol, the warm clove-like note also found in clove and bay, and linalool, a floral, faintly citrusy terpene also found in coriander and lavender. This trio — cinnamaldehyde, eugenol, linalool — is part of why Ceylon smells more layered and floral than cassia, which leans almost entirely on cinnamaldehyde.

The other defining chemical fact is what true cinnamon lacks: coumarin. Ceylon bark contains only trace amounts of this potentially hepatotoxic compound (around 0.004%), while cassia can carry roughly 1% — the single most important practical difference between the two barks, and the reason true cinnamon is the safer choice for anyone using it daily.

12Culinary uses

How to cook with it

True cinnamon's gentleness is a feature, not a weakness. Because it is sweet and floral rather than fiercely pungent, you can use a more generous hand than you would with cassia, and it shines in delicate dishes — milk puddings, custards, fine pastry, fruit — where cassia would overpower. Use whole quills for slow infusions and freshly ground bark where you want the flavour folded through.

• Biryani, pulao & garam masala: A short length of quill bloomed in hot ghee with cardamom and clove is the aromatic backbone of biryani and pulao, and ground cinnamon is a standard note in garam masala — true cinnamon adds fragrance without the bitterness cassia can bring.
• Masala chai & spiced coffee: A piece of Ceylon quill simmered into chai or kahwa gives a sweet, floral warmth; its delicacy means it lifts the tea rather than dominating it.
• Baking & desserts: Cinnamon rolls, apple pies, rice puddings (kheer / payasam), custards and spice cakes — true cinnamon's mild sweetness lets you use it freely in milk- and fruit-based sweets where harsher cassia would clash.
• Fruit, compotes & poaching: A quill poached with pears, apples, plums or in mulled wine perfumes the syrup beautifully; remove it before serving.
• Savoury meat & rice dishes: Cinnamon deepens Mughlai and Persian-style meat curries, korma, tagines and pilafs, working alongside onion, tomato and dried fruit in slow-cooked gravies.
• Spice blends & drinks: Beyond garam masala, it threads through baharat, ras el hanout, pumpkin-spice and chai blends, and steeps cleanly into spiced ciders, lassi and hot chocolate.

Cinnamon loves its fellow warm spices — clove, cardamom, nutmeg, star anise, ginger and black pepper — and the classic biryani trio of cinnamon, clove and green cardamom. On the sweet side it pairs naturally with apple, pear, banana, orange, chocolate, vanilla, honey and milk; on the savoury side with onion, tomato, lamb, chicken, rice and dried fruit. Because true cinnamon is milder, it blends rather than bullies.

13Consumption & dosage

How much, how often

True cinnamon's gentleness is the whole point - it is sweet and floral rather than harshly pungent, so you can use a more generous hand than with cassia, and it shines in delicate milk, fruit and pastry dishes. People use it as whole quills for slow infusions and as freshly ground bark stirred through dishes.

• Everyday culinary amount: A short length of quill, or a pinch to half a teaspoon of ground bark, flavours a typical dish or pot of tea. Bloom quills in hot ghee for biryani and pulao; add ground cinnamon late so it stays fragrant.
• Masala chai, kahwa & coffee: A piece of quill simmered into chai, kahwa or spiced coffee gives a sweet, floral warmth; its delicacy lifts the drink rather than dominating it.
• Baking & milk sweets: Cinnamon rolls, apple pies, kheer/payasam, custards and spice cakes lean on true cinnamon's mild sweetness, which suits milk- and fruit-based sweets where harsher cassia would clash.
• Savoury & festive cooking: It deepens Mughlai and Persian-style meat curries, korma and pilafs, and is a backbone of garam masala - used more in festive and winter cooking across North India.
• Fruit, mulled drinks & preserves: A quill poached with pears, apples or plums, or steeped in mulled wine and spiced cider, perfumes the syrup; remove the spent stick before serving.
• Who should be cautious: Culinary amounts suit most people. Those who are pregnant, on diabetes or blood-thinning medication, or with liver concerns may wish to avoid large or concentrated doses and, if eating cinnamon daily, to choose low-coumarin true cinnamon over cassia - check with a healthcare professional if unsure.

14Health & wellness

What the evidence says

The strongest themes in the research are below. Many studies use concentrated extracts, and the evidence is still developing.

• Modest help with fasting blood sugar: The best-supported effect: meta-analyses and a 2025 umbrella review of randomised trials find that cinnamon supplementation modestly lowers fasting blood glucose, with the strongest ('highly suggestive') evidence for this outcome, especially in people with type 2 diabetes or metabolic syndrome. Cinnamaldehyde is thought to improve insulin signalling and glucose uptake.
• Mixed effects on long-term blood sugar (HbA1c): Evidence here is weaker and inconsistent — some analyses show a small-to-moderate drop in HbA1c, but the 2025 umbrella review graded this evidence as weak and found the effect lost significance on reanalysis. So cinnamon is not a substitute for diabetes medication; at most it may be a minor adjunct.
• Possible small improvements in blood lipids: Several meta-analyses report reductions in total cholesterol and triglycerides with cinnamon, though the evidence is graded weak-to-suggestive and effects on LDL and HDL are inconsistent.
• Antioxidant and anti-inflammatory activity: Cinnamon and cinnamaldehyde are strong antioxidants in laboratory assays and show anti-inflammatory effects in experimental models. This is promising lab and mechanistic evidence, not proof of benefit from the amounts used in cooking.
• Traditional digestive and warming use: Cinnamon (tvak) has a long role in Ayurveda and folk medicine as a carminative and digestive warming spice. These uses are culturally well attested but not backed by strong modern clinical trials.

16Myths vs facts

Setting the record straight