- Type
- Trees & Vines
- Difficulty
- Hard
- Season
- -
- Sowing
- Not cultivated
Nutmeg
Myristica fragrans
Myristicin and volatile oil · the whole nut you grate
Nutmeg is the seed of an evergreen tree native to the Molucca Islands of Indonesia. When the apricot-like fruit ripens and splits, a red lacy covering appears wrapped around the seed, and that lace, dried separately, is mace. A few passes of a grater into a cream sauce, a potato dish, a hamburg steak or a batch of baked goods changes the way both sweetness and meat read. The Donguibogam lists it in the Herb section as 肉豆蔲, records the alternative name 肉果, and marks it 【唐】 as material brought in by way of China. It describes a small round form with a thin, hard purple shell and pungent flesh inside, says to strip the shell and use only the flesh, and grades oily, full-bodied pieces highest over dry, pale, shrunken ones. For preparation it records wrapping the seed in vinegar-mixed flour dough, cooking it in embers, then beating it in paper to press the oil out, and it leaves the caution not to let it touch copper. Ground nutmeg loses its aroma quickly, so keeping whole nuts and grating as needed is the better habit. It is also a spice with documented poisoning cases after large single doses, so the amount that goes into cooking stops at a few passes of the grater.
Where It Grows
- Origin The Molucca (Maluku) Islands are its birthplace, and they still yield most of the world's production. Maluku, North Sulawesi and Aceh are the growing regions.
- Major producer In Kerala it is grown on the foothills of the Western Ghats, interplanted with pepper and clove.
- Grenada Major producer A small island nation in the Caribbean, and a growing region old enough that nutmeg appears on its national flag. It is grown on hillsides of volcanic soil.
- Major producer It is grown in the central mountain country, in fields where several crops are planted together.
It is native to the Molucca Islands of eastern Indonesia, and for a long time it grew nowhere else. From the late 18th century onward, seedlings were transplanted to the Indian Ocean and the Caribbean, which produced the arrangement of growing regions we have today. The FAO counts nutmeg, mace and cardamom together as a single item, so those figures alone cannot tell you a country-by-country ranking for nutmeg by itself; the list above instead picks out the places that actually produce it.
- Optimum
- 25~30℃
- Range
- 20~35℃
- Hardiness
- Tropical
- Day length
- Not applicable
An evergreen canopy tree of the tropical lowlands, where temperatures hold between 25 and 30℃ all year and rain falls evenly. It does best in forests on volcanic soil below 500 m above sea level, and it has never tolerated frost, not once. What sets its flowering time is not day length but the alternation of rain and dry season. The species is dioecious, so fruit forms only on female trees.
How to grow
- Light
- A tropical evergreen tree native to the Molucca Islands, growing in strong sun, heat and humidity. It is not grown in Korea
- Soil and depth
- At source it grows in forest on free-draining volcanic soil. The trees are dioecious, so fruit comes only from female trees
- Spacing
- Spice counters sell whole nutmeg, ground nutmeg and mace separately. Buying whole and grating as needed is the better route
- Watering
- Keep it dry. Damp brings mould to a whole nut and cakes the ground form
- Feeding
- When buying, choose the nut that feels heavy in the hand. A light, dry one has lost its oil and with it the aroma
- Harvest
- At source the apricot-like fruit is gathered as it ripens and splits open of its own accord. The red lacy covering is peeled off and dried separately as mace, while the seed is dried, cracked out of its shell and kept as the kernel
What makes the difference. Grate only what you need on a dedicated or fine grater. An oily sheen on the cut surface means the aroma is still there
Why this one is harder. It is a tropical tree that cannot be grown here, and the care it needs is not cultivation but restraint. Because large doses have produced documented poisoning cases, keep whole nutmegs out of children's reach and stop at a few passes of the grater in cooking
Common problems
- Damp and mould You will see White patches on the surface of a whole nut and a musty smell What to do Store sealed with a desiccant somewhere cool. Discard anything showing patches
- Lost aroma You will see Grating gives a flat note and a dry, powdery cut surface What to do It is old stock. Buy ground nutmeg in small jars and finish within the season; keep whole nuts and grate as needed
- Pantry insects You will see Small bore holes in a whole nut and powder collecting at the bottom of the jar What to do Discard bored nuts and move the rest into an airtight container. Empty and wipe the cupboard, and check the other spices too
This page describes how a crop is grown and used. It does not claim health effects for any food, nor is it intended to prevent or treat disease. Component and study notes are references only and do not mean the same result occurs in people. Consult a medical professional about health concerns.
Health Benefits
The old record — yukdugu (肉豆蔲). The Donguibogam lists it in the Herb section as 肉豆蔲, records the alternative name 肉果, and marks it 【唐】 as material brought in by way of China. Its nature is set down as warm and its taste as pungent, with a note that some call it bitter, and it is described as having no toxicity. The form is given as small and round with a thin, hard purple shell and pungent flesh inside, and the text says to strip the shell and use only the flesh. It grades oily, full-bodied pieces highest and dismisses dry, pale, shrunken ones. For preparation it records wrapping the seed in vinegar-mixed flour dough, cooking it in embers, then beating it in paper to press out the oil, and it leaves the prohibition against letting it touch copper. What an old medical text wrote differs from how it is judged today.
A buying test that carried through. The line 肉油色肥實者佳 — oily and full-bodied is best — overlaps with how a whole nutmeg is chosen today. The seed is rich in fat, so a freshly grated surface has an oily sheen, while a dry, light nut is old stock with the aroma gone. It shows a four-hundred-year-old sorting test resting on a property of the material itself.
The volatile oil and large-dose reports. Myristicin is reported as the principal component of nutmeg's volatile oil, with elemicin and sabinene identified alongside it. Separately, clinical reports from several countries describe dizziness and nausea after a single dose amounting to one or two whole nuts. These are records of composition and of case reports, and they concern quantities far beyond what cooking uses.
Nutrition
- Myristicin (principal component of the volatile oil) — the compound behind the characteristic aroma, and the one implicated in large-dose reports
- Volatile oil (released on grating) — a mix including elemicin and sabinene
- Fat (close to half the seed) — the fat that sets solid as nutmeg butter
- Starch (the body of the seed) — what makes the grated powder clump
The amount is fixed What goes into a dish is a few passes of the grater per plate. Poisoning cases have been reported in Korea and abroad after a single dose amounting to one or two whole nuts. The aroma is also strong enough that too much weighs a dish down, so keeping to the amount serves flavour and safety in the same direction.
Myristicin and the volatile oil Myristicin is reported as the principal component of nutmeg's volatile oil, with elemicin and sabinene identified alongside it. It carries the characteristic aroma and is also the compound implicated in large-dose reports. This entry stays with the compositional record.
Buy whole, grate as needed Ground nutmeg goes flat within a few months. A whole nut is hard enough to take a dedicated or fine grater, and the cut surface shows an oily sheen. The Donguibogam graded oily, full-bodied pieces highest for the same reason.
Nutmeg and mace One fruit yields both the seed and the red lacy covering wrapped around it. Dried, the seed is nutmeg and the covering is mace. Mace is milder in aroma and lighter in colour, which is why it turns up so often in white sauces.
Pairings
○ Bechamel and cream sauces — Two or three passes of the grater into a milk-and-flour sauce clears the raw flour note. Add it off the heat so the aroma survives. It works across gratins and cream pastas alike.
○ Minced meat dishes — A very small amount in a hamburg steak or meatball mix shifts the way the meat reads. Mix it in with the salt and pepper at the kneading stage. A few passes per plate is plenty.
○ Baked goods and potatoes — It goes into cookie and pound cake batter alongside cinnamon, and a little into mashed potato. The aroma sits well on both the sweet and the savoury side. Since baking drives it off, mix it into the batter rather than dusting it on top. Potato
△ Never a large dose — poisoning cases — Poisoning cases with dizziness, nausea and palpitations have been reported in Korea and abroad after a single dose amounting to one or two whole nuts. Cooking stops at a few passes of the grater per plate. In a household with children, do not leave whole nutmegs out like sweets; keep them out of reach.
△ In pregnancy, do not exceed culinary amounts — A pinch used as a seasoning and a large single dose are two different matters. In pregnancy, keep to culinary amounts and do not take it separately in supplement form. Ask your clinician about anything you are unsure of.
△ Do not keep ground nutmeg for long — Ground nutmeg goes flat within months, and a flat jar invites adding more and more to chase the aroma. Buy whole and grate as needed; if you buy ground, buy a small jar and finish it within the season. The habit of making up for lost aroma with volume is what leads to overdoing it.
Varieties
- Whole nutmeg (form) — The dried seed whole. Grated as needed, the aroma lasts longest
- Ground nutmeg (form) — Pre-milled. Convenient, but flat within a few months
- Mace (plant part) — The red lacy covering around the seed, dried separately. Milder in aroma and lighter in colour
Source: Donguibogam, Herb Section 肉豆蔲 · Ministry of Food and Drug Safety, Food Safety Korea