Where Does Oud Grow? The Natural Habitat of Oud Trees

When we savour an oud of a deep scent, we rarely ask ourselves: from which land did it come? And in which forest did the tree that carried it grow? This article answers the question where does oud grow? from the angle of the natural habitat: which environment oud trees need to live, what climatic conditions suit them, where they extend on the map of Asia, and why the Indonesian archipelago occupies a prominent place in this habitat. And it is one of the axes of the complete guide to oud.

1. Where does oud grow? An overview

Before we speak of the places, we ought to correct a common conception: oud is not "planted" as wheat is planted, nor does it sprout from the ground as a ready material. Oud is a resinous aromatic material that forms inside particular trees, and we have detailed this in what is oud?. So when we ask "where does oud grow," we are in truth asking: where do the trees that carry it grow? And what is the environment in which these trees live?

Oud trees belong essentially to two botanical genera: Aquilaria, which is the most widespread and the most well-known, and Gyrinops, which predominates in the eastern regions of the oud range. And both genera are among the tropical trees that grow in the wild within the rainforests of southern and southeastern Asia, according to what is circulated in the general botanical literature.

And the general image that can be relied upon is that the natural habitat of these trees lies in the tropical and subtropical belt of Asia, where the heat and the humidity are high and the forest cover is dense. From the eastern foothills of the Himalayas and northeastern India, passing through mainland Southeast Asia, reaching the islands of the Indonesian archipelago and beyond it to the east. This is a wide range, almost continuous in its general climatic conditions, even if its details vary from one place to another.

And we avoid here drawing decisive boundaries or giving precise numbers about the areas of spread or the lines of latitude; for details such as these vary with the variance of the species and the sources, and it is difficult to be decisive about them. What concerns us to establish is that oud is a child of a humid tropical environment, and that it does not grow naturally in the cold, dry, or temperate climates, but is connected closely to the warm rainforests.

And this environmental understanding is not a knowledge luxury, but a key to understanding why oud comes from particular regions in the world and not others, and why the oud of each region carries a character that differs a little from its neighbour. For the habitat is the background in the light of which the rest of the questions of oud are understood.

And it is worth noting that the talk of the natural habitat means essentially the wild spread of these trees in their forests. As for what was introduced later of plantations in some countries, it is an attempt to imitate the same conditions in prepared environments, and it remains governed by the same tropical climate that the tree needs. For the plantation does not cancel the condition of the habitat, but seeks to provide it artificially as much as possible.

2. The suitable environmental conditions

What is the environment in which oud trees flourish? The general answer — as is circulated in the botanical description — is that these trees prefer the climate of the tropical rainforests: a high temperature throughout the year, high humidity, abundant distributed rains, and a soil of good drainage. And it is the environment of the permanent humid warmth, not the long seasons of drought.

And the Aquilaria and Gyrinops trees grow mostly within the lowland and hill forests of medium elevations, not in the high, cold mountain peaks. For they are trees of a low tropical forest, living amid other trees within a rich, multi-layered ecosystem, not in open plantations exposed to the sun and the direct winds. We mention this as a general description, without claiming defined numbers about the elevation or the rates of rain.

And it is striking that the same conditions that suit the growth of the tree may be connected also to the formation of oud in it. For the humid environment rich in microorganisms and fungi is an environment in which the injuries that stimulate the tree to secrete the resin are abundant. But we are not decisive about a direct, decisive causal relationship, since the formation of oud is a complex process we detailed in why some trees produce oud and not others.

And it is important that we understand that these conditions are not a recipe whose following necessarily produces oud. For the suitable environment is a condition for the life of the tree and its spread, but it does not guarantee that every tree carries oud. For the tree may live its whole life in the most suitable environments without a resin worth mentioning forming in it. The habitat prepares the stage, but the formation remains an exception, not a rule.

And for this the talk of "oud-producing regions" does not mean that every tree in them is producing, but means that the conditions together — a suitable environment, available trees, and a standing possibility of injury — make the appearance of oud in them possible and more preponderant than in others. And this precise distinction between the possibility of growth and the act of production is a foundation for understanding the rest of the article.

3. The two genera: Aquilaria and Gyrinops, and where they predominate

The circulated botanical description tends to consider the genus Aquilaria the most widespread in the oud range, for its presence extends from southern and mainland southeastern Asia to the western and central parts of the Indonesian archipelago. For it is the genus to which most of the historically known oud origins in the Asian continent are connected.

As for the genus Gyrinops, its presence predominates in the eastern regions of the range, especially in the east of the Indonesian archipelago and around it. And this eastern distribution gives the oud of those regions a particularity that many connect to the distinctive character of eastern Indonesian oud. And we have treated this eastern angle in its historical context within the history of Papua oud, and we do not repeat its details here.

And this division ought not to be understood as a strict boundary; for the geographical distribution of the botanical genera and species is a graduated and overlapping matter, and the species may adjoin one another in the regions of contact. Therefore we describe the matter as a predominance and a preponderance, not an absolute confinement: the Aquilaria is more western and continental and in the west of the archipelago, and the Gyrinops is more eastern. This is the general framework that assists in conceiving the map.

And the practical benefit of knowing this distribution is that it explains a part of the variety of the oud circulated in the market. For when you hear that the oud of an eastern region differs in its character from the oud of a western region, one of the possible causes of that is the difference of the genus or the botanical species itself, in addition to the difference of the environment. And we stress that these are general relationships, not consistent laws.

4. The range of spread in Asia

If we widen the lens to the whole continent, the range of spread of oud trees can be divided into three great regions connected in their general conditions, according to what is circulated:

South Asia: and it includes the eastern edges of the Indian subcontinent and the neighbouring humid tropical foothills, where there is a known historical presence of Aquilaria trees in the forests there.

Mainland Southeast Asia: and it is the continental strip extending in the mainland part of the region, with its dense rainforests that are counted among the known historical habitats of oud.

Maritime (archipelagic) Southeast Asia: and it is the wide world of islands in which the habitats of Aquilaria and Gyrinops are distributed together, and at its heart lies the Indonesian archipelago to which we devote the following axis.

This division is an approximate framework for conception, not a precise map. And the intent of it is that the reader realizes that oud is an Asian material par excellence, the roots of its habitat extending across a wide range, not a single country. As for the detail of the countries connected to the production and trade of oud each on its own, and the position of Indonesia among them, it has an independent axis in this guide that treats the geographical and productive side in detail, and we content ourselves here with the environmental side of the habitat.

5. The heart of the habitat: the Indonesian archipelago

Among the habitats of oud in Asia, the Indonesian archipelago occupies a prominent place, for clear environmental reasons: for it is a vast extension of humid tropical islands, wide areas of which are covered by dense rainforests, and in which highly diverse environments adjoin one another from one island to another. This geographical variety makes the archipelago a rich habitat for both genera of oud.

And because we at Oud Treasure bring the oud from its habitats in this archipelago directly, we clarify the transparency of the origin and the supply chains on the oud sources page. And each origin within the archipelago has its own environment that is reflected in the character of its oud. And you can explore this variety through our regional collections:

From the wide forests of Kalimantan, to the island of Sumatra, deep-rooted in the history of oud, to the east where Papua, Sulawesi, and Merauke are. And all of them fall within the Indonesian collection that gathers the origins of the archipelago in one place.

And for whoever wants the historical background of these origins, we have singled out a series of regional articles that treat the history of oud in each region, such as the history of Kalimantan oud and the history of Sumatran oud. And we stress that here we summarize and refer, we do not repeat what we detailed there; for the direction of this article is the environmental habitat, not the detailed history.

And what distinguishes the archipelago environmentally is that it does not offer a single homogeneous habitat, but a mosaic of habitats: large islands with their vast internal forests, and others smaller with their own fine microclimates, and coasts, hills, and lowlands that vary in their soil and their humidity. This variety within the single country is what explains why Indonesian oud is not reduced to a single character, but comes in multiple spectra that reflect the multiplicity of its habitats.

And the conclusion is that the Indonesian archipelago is not merely one of the habitats of oud, but among the richest of them in variety and the widest of them in disparate environments. And this environmental variety — from the western forests to the eastern islands — is what grants Indonesian oud its richness in colour, density, and layers of scent, and it is what we touch in the variance of our kinds from one origin to another.

6. Why the habitat affects the character

It is often observed — as is common among the people of oud — that the oud of a certain region inclines to a character that differs a little from the oud of another region: this one more inclined to sweetness and warmth, and that one to depth and earthiness. So what is the explanation of that? The most likely explanation is that the habitat, with all its elements, leaves an imprint on the resulting material.

For the habitat is not merely a location on the map, but a set of combined factors: the kind of tree predominant in the region (Aquilaria or Gyrinops), the nature of the soil and the climate, the type of injuries and the microorganisms prevalent in that environment, and the length of the duration in which the resin accumulated. All these factors may contribute together to shaping the final character of the oud, closer to the idea of "terroir" known in other worlds.

But we are keen on the reservation here: for the relationship between the region and the character is a general, circulated relationship, not a precise law that can be decided for every piece. For you may find within the single region a great variance between one piece and another, and two pieces from two distant regions may resemble one another. Therefore we avoid the decisive promises that "the oud of such-and-such region smells like this," because the scent is an individual experience that the name of the origin alone does not describe.

And for whoever wants to understand why oud varies in the first place from one tree to another before speaking of the regions, we advise returning to why some trees produce oud and not others, for it clarifies that the variance begins from the level of the individual tree, then upon it is superimposed the effect of the habitat and the region. And thus the two dimensions — the individual and the geographical — gather in shaping what we smell in the end.

7. The habitat and sustainability

The talk of the habitat of oud is not complete without pointing to an important reality: this wild habitat is not an inexhaustible resource. For the escalating demand upon oud across the decades formed a pressure upon the wild trees in their natural habitats, a shift we detailed in from wild to cultivated oud.

And the concerned bodies globally have realized the sensitivity of the situation of oud trees in the wild, so their genera were listed within international agreements that regulate the trade in them with the aim of protecting the species from depletion. And we have traced this regulatory course in the history of the CITES convention and oud, and we content ourselves here with pointing out that the protection of the habitat is a part of the future of oud itself.

And for this the orientation toward responsible sources and sustainable cultivation became a necessity, not a choice, in preservation of the trees in their original habitats on the one hand, and in guarantee of the continued availability of oud for the coming generations on the other. And we clarify our approach in this matter within the sustainable sourcing page.

And the message with which we would like to seal this axis is that understanding the habitat bequeaths a respect for it. For when we realize that oud is the fruit of a tropical forest that formed over long years, we realize the value of every piece, and we deal with it with the appreciation it deserves, and we prefer the sources that preserve this habitat, not those that deplete it.

Read also

To form a more comprehensive picture, begin from the complete guide to oud which gathers all the axes of the subject, then look over why some trees produce oud and not others? to understand the variance from the level of the tree itself. And for whoever wants the geographical and productive picture, we have singled out an independent axis, which is the oud-producing countries, which treats the most prominent countries of the production and trade of oud and the position of Indonesia among them.