A Guide to Cultivating Oud Trees and Producing Agarwood

Oud was for a long time the fruit of the wild forest alone, extracted from trees that grew by themselves in the jungles of Southeast Asia. But the scarcity of the wild trees and the rising demand pushed people, decades ago, toward a new question: can oud trees be cultivated and induced to produce it by the hand of man? This guide is a general educational overview of the cultivation of oud trees and the production of agarwood: why they are cultivated, what species are grown, in what environment they grow, how they pass from the seed to the tree to the moment of induction, and what question of quality and economy accompanies them. We wrote it at Oud Treasure as suppliers, not farmers, in honest, reserved language that explains the concepts and does not claim an engineering expertise in the farms.

1. Why are oud trees cultivated?

To understand the cultivation of oud, one ought first to understand the predicament of the origin. Oud does not form in every tree of its family, but arises in response to a wound and infection that push the pale, light wood to transform gradually into dark wood saturated with aromatic resin. This general mechanism happens only in a limited proportion of the wild trees, and over the course of long years, which made wild oud rare by its nature. We explained this mechanism in detail in the science of oud formation.

With the increase of global demand and the dwindling of the numbers of wild trees in their habitats, cultivation emerged as a logical response: instead of relying on what the forest yields by chance, the trees are planted in farms and tended until they reach a stage at which they can be induced to produce the resin. This shift from reliance on the wild to organized cultivation we treated from its historical and practical angle in the transition from wild to cultivated agarwood.

And cultivation has a dimension connected to sustainability that deserves fairness. When the trees are cultivated and induced in the farms, it is supposed in theory that the pressure on the wild communities lightens, because part of the demand is met from a managed source. Yet we are reserved here about assertion; the relationship between cultivation and the preservation of the wild species is complex, depends on many practices, and cultivation alone does not suffice to guarantee sustainability. We put this forward as a consideration to be mentioned, not a confirmed result.

And there remains, in the background of all that, a question that accompanies cultivation: how does oud form in the first place, and does what is induced in the farm resemble what arises in the wild? This is the essence of the matter of natural formation versus induction, and it is a thread that will recur in this whole guide. Likewise the broader comparison between wild versus cultivated places cultivation in its correct context: it is not a complete substitute for the wild, but a different path with its own character, economy, and value.

2. The cultivated species

Oud trees are not a single botanical species, but belong to the botanical family Thymelaeaceae, and within it to several genera and species. The most famous of what is cultivated of them belongs to two main genera: Aquilaria, which is the most widespread and cultivated in Southeast Asia, and Gyrinops, which predominates in the eastern regions of the Indonesian archipelago such as Papua and Nusa Tenggara. We detailed these genera and their species in the species of oud trees.

Among the species of Aquilaria whose mention recurs in the context of cultivation: Aquilaria malaccensis, Aquilaria crassna, and Aquilaria microcarpa, alongside other species that differ according to the region. As for Gyrinops, Gyrinops versteegii and others are mentioned in the eastern Indonesian context. We are keen to cite these scientific names with their precision, because the confusion between species is common in the trade, and the commercial name does not always indicate the botanical species.

And the choice of the cultivated species is a matter that depends on many local factors: the suitability of the species to the available environment, the availability of seeds and seedlings, and the accumulated experience around it in the region. We avoid here preferring one species over another or attributing a decisive agricultural superiority to any of them, because that is the affair of the agricultural specialists acquainted with the local conditions, not the affair of a supplier describing the general scene.

Among what is worth noting is that all the oud-producing species of Aquilaria and Gyrinops are listed — according to what the Convention on International Trade in Endangered Species (CITES) publishes — within Appendix II, which is an appendix that regulates their international trade without prohibiting it, for the preservation of their sustainability. This regulation is one of the drivers of the trend toward cultivation, and it forms a background for the serious farms that seek documentation and compliance.

3. The environmental conditions

Oud trees in their habitat are ascribed to the humid tropical regions, where there is warm heat throughout the year, high humidity, and regular rainfall. This is why we find their natural habitats in the forests of Southeast Asia: from Indonesia and Malaysia to Indochina and what neighbors it. And any talk of their cultivation begins from imitating these general conditions as much as possible.

As for the detail of these conditions — the nature of the soil that suits them, the range of heat, and the amount of humidity and rainfall — that is a matter we are reserved about drawing with numbers. The sources vary, the conditions differ from one location to another, and any number we mention may mislead a reader who supposes it a guaranteed recipe. We content ourselves with the general description: a warm, humid, well-drained environment, similar to what the trees grow in in the wild. And whoever wants precise numbers for his location, his reference is the local agricultural extension services.

It is mentioned generally that young oud trees benefit from a measure of shade in their early stages, like many forest trees that arise under the canopy of larger trees, then need more abundant light with their growth. But this is a general description, not a strict rule, and its details are the affair of the specialist. What matters is that the suitable environment is not merely land and water, but a system of heat, humidity, light, and drainage all together.

We will detail in independent articles within this guide what relates to the climate suitable for the cultivation of oud, the characteristics of the soil said to suit it, and the role of rainfall and humidity in its environment. All of them remain within the general, qualitative description, in fulfillment of our promise not to claim a technical precision we are not qualified for.

4. From the seed to the tree

The journey of the cultivated oud tree begins from the seed. And the seeds of oud trees are described generally as quick to lose their vitality, that is, they do not tolerate long storage, and it is preferred to plant them fresh after their collection. This description is circulated among those who work in cultivation, and we cite it as a general observation, not a rule regulated by a numerical timing.

From the seed the seedlings are sprouted, and they are usually raised in prepared nurseries that provide them partial shade, humidity, and precise care in their first fragile stage. This nursery stage is decisive because the small seedling is more sensitive to the fluctuations of the environment than the mature tree. And when the seedlings reach a sufficient measure of strength and size, they are moved to their permanent place in the ground.

The transplanting of the seedling is a sensitive step, as it moves from the protected nursery environment to the open ground, and it needs care until its roots establish and it acclimatizes. As for the matter of the spacing between the trees in the farm, it is observed for reasons relating to light, ventilation, and root competition, but we do not mention specific distances, because that depends on the species, the soil, and the manner of management, and its reference is the agricultural specialist.

And patience is a trait accompanying this whole journey. The oud tree is not planted today to produce tomorrow; rather it needs long years of growth before it reaches a stage at which its induction can be considered. We avoid mentioning a specific number of years because the estimates vary, but what is certain is that the horizon is temporally long, and this alone explains an aspect of the value of oud and the economy of its cultivation.

We will devote within this guide independent articles to the planting of seeds, the production of seedlings in nurseries, the transplanting of seedlings to the ground, and the distance between the trees — each of them with a general description that remains within the bounds of what befits a supplier, not a farmer.

5. The care of the trees

After the trees establish in the ground, a long stage of care begins that extends for years. This care revolves around three general axes: water, nutrition, and the protection of the tree from pests and diseases. All of them are agricultural practices managed by the people of specialization, and we describe them here in a general description into which we introduce neither schedules nor recipes.

As for irrigation, oud trees, being tropical trees, need sufficient humidity, especially in their early stages before their roots take firm root. And the need for water varies according to the climate, the soil, the age of the tree, and the season of the year. We avoid mentioning amounts or schedules for irrigation, contenting ourselves with the general principle: providing suitable humidity without an excess that harms the roots.

And as for fertilization and nutrition, it is mentioned generally that the trees benefit from fertile soil and from suitable nutrition that supports their growth. Yet we do not mention fertilizer proportions nor specific nutrition programs, because that is among the most precise of what differs with the difference of soil and species, and its reference is soil analysis and the counsel of the specialist, not an introductory article.

And as for pests and diseases, oud trees — like the rest of trees — are susceptible to insects and diseases that may afflict them, and the health of the tree is a condition for its reaching the stage of production. Here a subtle paradox appears: oud itself arises in response to an injury and infection, but this does not mean that any injury is beneficial; there is a difference between the harmful injury that weakens the tree or kills it, and the intended, directed induction that is managed later. Therefore the protection of the tree generally remains an aim until the moment of induction.

We will devote within this guide independent articles to the irrigation of oud trees, their fertilization, and their diseases and pests — with the same general description committed to the bounds of introductory knowledge.

6. Induction and the production of oud

The cultivated tree reaches, after years of growth, the stage around which the whole cultivation of oud revolves: induction. The healthy, mature tree does not contain oud merely by its growing large; its wood remains pale and light with no resin worth mentioning unless it is subjected to what provokes its defense so it begins to secrete the aromatic resin. And induction is the intended intervention to bring about this provocation instead of awaiting its occurrence by chance as in the wild.

And when does the process of induction begin? It is said generally that it begins when the tree reaches a sufficient measure of age and size that makes it able to bear the intervention and respond to it. We avoid determining a numerical age, because it varies according to the species and the conditions. What matters conceptually is that induction is not hastened upon a young tree, and that it is a decisive moment in the life of the farm that separates the stage of growth from the stage of production.

And the essence of induction is that there is brought about in the tree something resembling what happens in the wild naturally: a wound and infection that push the wood to transform. And the great question that accompanies all this is: does the resin resulting from managed induction resemble what arises naturally? This is the matter of natural formation versus induction that we pointed to, and we refer the detail of its answer to the science of formation itself, since the difference is fine and a subject of debate among the specialists.

As for the methods of induction in their diversity, we content ourselves with pointing to them conceptually without an applied explanation: there are approaches spoken of generally, of them the mechanical, of them the biological, and of them the chemical, and each of them has its logic, its effects, and its cautions. The detailing of these methods and their evaluation is the affair of the people of specialization, and their scientific aspect was treated by our guide in the science of oud formation. And we — as suppliers — are concerned with the result of the process more than our concern with its engineering.

We will devote within this guide an article to the question "when does the process of induction begin?" and another to the production of oud in the farms as a practice that gathers cultivation and induction, with the same commitment to the general conceptual description.

7. Wild versus cultivated, and the economy

There remains a question that presses whenever cultivated oud is mentioned: does it match the wild in quality? And the honest answer is that it is a question not decided by yes or no. Wild oud arose over a very long time in conditions that no one controls, and there is often ascribed to it a depth and complexity in character that the enthusiasts appreciate. As for the cultivated, it arises in a shorter temporal horizon and managed conditions, and its character may vary widely according to the species, the environment, and the manner of induction.

But it is from fairness that we do not place the cultivated in a lower rank at all. Good cultivated oud may be pleasant and of value, and it allows many access to oud in a way that would not have been possible had reliance remained on the wild alone. The precise comparison between the two — in conditions, character, and value — we detailed in wild versus cultivated, and we see that the most fitting is that the two be regarded as two different paths, each with its place, not two competitors on a single criterion.

And as for the economy of oud farms, it is a field we describe with extreme caution. It gathers between a long-term investment — since years pass before the first production — and many risks relating to the success of the growth, the induction, the pests, and the market. We deliberately avoid here any numbers about a cost or a return or a yield per tree, because such numbers vary enormously and change with the change of conditions, and their mention is a claim to an economic expertise that is not our specialization.

What we can say generally is that the cultivation of oud is not a project of quick return, but a long commitment that requires patience, knowledge, and the management of risks. And this alone explains an aspect of the value of oud generally — its wild and its cultivated — and keeps the demand for the wild standing despite the expansion of cultivation. We will devote within the guide two independent articles: one for the difference between the wild and the cultivated tree, and the other for the economy of oud farms with a general description free of numerical estimates.

8. Oud cultivation outside Asia and its future

With the expansion of interest in oud, a question recurs: can oud trees be cultivated outside their Asian habitat? Theoretically, wherever the suitable humid tropical conditions are available that may be possible, and attempts have been made in different regions of the tropical world. But we put this forward as a possibility to be examined, not a confirmed result, for the success of cultivation does not depend on the climate alone, but on the species, the soil, the experience, and the successful induction, all of them accumulated challenges outside the original habitat.

And we are reserved especially about asserting the quality of the oud that may be produced outside Asia in comparison with its original habitat, for this is an open question about which we possess no certainty. What is certain is that the Asian habitat — and Indonesia at the heart of it — remains the reference in the accumulation of experience, the diversity of the species, and the depth of the traditions surrounding oud.

And as for the future of oud cultivation, it appears to be heading — according to what is circulated — toward more reliance on cultivation and managed induction, driven by the scarcity of the wild and by the international regulation of the trade of the species. We treated the horizons of this path in the Indonesian context in the future of the oud industry in Indonesia. Yet this future is not free of questions: about the quality of the cultivated, about its true sustainability, and about its ability to preserve what oud has of value and standing.

And our stance at Oud Treasure on all this is the stance of the honest observer, not the prophesier. We bring oud from its sources, and we see cultivation as an important development in the world of oud that deserves understanding without exaggeration in optimism or pessimism. We will devote within the guide independent articles to the question of oud cultivation outside Asia, to the common mistakes in the cultivation of Aquilaria, and to the future of the cultivation of Gyrinops in Indonesia.

9. The complete axes of the guide

This article is the center of a broader guide in which we cover every axis of the axes of oud cultivation in detail in independent articles. What we surveyed above are general introductory summaries, while the detail — within the bounds of what befits a supplier, not a farmer — its place is the specialized articles. The following list is the complete map of the guide; we build it in succession and link it here whenever each article is completed, so this page becomes your gateway to the whole subject of oud cultivation:

1. 1. The climate suitable for cultivating oudA general overview of the climatic range in which oud trees are usually cultivated, and why their cultivation is ascribed to the humid tropical regions.
2. 2. The soil suitable for cultivating oudA discussion of the characteristics of the soil said to suit oud trees generally, in general descriptive language without numerical recipes.
3. 3. The amount of rainfall and humidityThe role of humidity and rainfall in the environment of oud trees, and how they are regarded within the circulated tropical conditions.
4. 4. The planting of seedsA general introduction to starting oud trees from seeds, and what is circulated about the sensitivity of the seed and its timing.
5. 5. The production of seedlingsHow the seedlings are raised in the nurseries before their transplanting, as a general description of the stage of early care.
6. 6. The transplanting of seedlingsA glimpse of the transplanting of seedlings to their permanent place, and what is observed in this sensitive stage generally.
7. 7. The distance between the treesWhy the spacing of the trees in the farms is attended to, and what the general considerations behind that are without decisive numbers.
8. 8. The irrigation of oud treesGeneral principles about the need of oud trees for water in their different stages of growth.
9. 9. The fertilization of the treesA general overview of the nutrition of the trees in the farms, without schedules or specific fertilizer proportions.
10. 10. The diseases and pests of the treeWhat oud trees face of potential pests and diseases, and why the health care of the tree is considered important.
11. 11. When does the process of induction begin?When it is said that the tree has become ready to begin the induction, as a general conceptual description, not a precise temporal recipe.
12. 12. The difference between the wild and the cultivated treeA comparison between the wild and the cultivated trees in terms of conditions, character, and value.
13. 13. The production of oud in the farmsHow the production of oud is organized within the farms as a practice that gathers cultivation and induction.
14. 14. Can oud be cultivated outside Asia?A discussion of the possibility of cultivating oud trees outside their Asian habitat, and what is raised around that.
15. 15. The economy of oud farmsA general overview of the economic aspects of oud farms without numbers or financial estimates.
16. 16. Common mistakes in cultivating AquilariaWhat is circulated of mistakes that whoever cultivates Aquilaria trees falls into, as a general cautionary description.
17. 17. The future of cultivating Gyrinops in IndonesiaThe trends of cultivating Gyrinops trees in Indonesia and their future horizons.

Until the building of these articles and their linking is completed, you find in the sections above an ample summary of each of them, with links to what we have actually published of related content on our blog. And we remind finally of what we began with: this is a general educational guide we wrote as suppliers, and the reference of actual cultivation is the agricultural specialists and the extension services in each country.

And this guide integrates with two other references on our store: if you wish to understand Indonesian oud from its origin, character, and market, its place is the comprehensive guide to Indonesian oud; and if the question of how oud forms in the first place in the tree — whether wild or induced — draws you, your destination is the science of oud formation. And between this cultivation guide and those two references the picture of oud is completed with us: from the tree in the ground to the piece in your gathering.