Agarwood Seed Guide: Fruiting, Viability, Germination and Seed vs Seedling

An agarwood seed is the seed of an Aquilaria tree, the genus that produces agarwood resin. It is small, dark and soft-coated, and it carries no oud at all — the resin only forms decades later, in wounded wood.

Why is resinous agarwood scarce? According to Liu et al. (2013), only about 10% of Aquilaria trees form agarwood naturally; the rest stay pale, almost scentless wood unless they are wounded and infected.^[6]

That distinction matters for buyers. A seed is planting material, not an aromatic product. Its value lies entirely in the tree it may become, so its quality depends on the mother tree, the freshness of the seed and how it was handled after collection.

On our plantation in Guan Zhu Town, Dian Bai District, all our trees are Aquilaria sinensis, the species native to southern China and often called white wood incense tree (土沉香) locally.^[1] Other species, such as A. malaccensis and A. crassna, produce seed in the same basic way, although size and timing differ.

From Flower to Capsule to Seed

Aquilaria trees carry small, yellow-green flowers in clusters. After pollination, each flower can set a woody, slightly flattened capsule that hangs from the twig.

When the capsule ripens, it splits open along its seams. Usually one or two seeds sit inside, and each seed hangs on a short thread before it drops. Botanical descriptions of the genus also note a tail-like appendage on the seed, which helps identify it.

In practice, growers recognise ripe fruit by colour and by the first capsules that crack. A green capsule that is picked too early rarely gives a strong seedling. Therefore timing the harvest is the first real decision in seed propagation.

In southern China, Aquilaria sinensis flowers in spring and its fruit ripens in summer. The exact weeks shift every year with rainfall, temperature and the age of the trees, so growers watch the trees rather than the calendar.

Not every tree fruits every year. Young trees may flower lightly or not at all, while older, open-grown trees usually carry heavier crops. Moreover, a wet, windy flowering period can leave a poor fruit set even on mature trees.

For a buyer, this creates a hard constraint. Fresh seed exists for only a few weeks each year in any one region. Outside that window, anyone offering "fresh" seed is offering stored seed, and stored Aquilaria seed is a gamble, as section 3 explains.

How Seed Is Collected on a Plantation

Seed collection is manual work. Growers typically pick capsules as they begin to open, or spread nets under productive trees so that falling seeds do not land in wet soil and rot.

Good nurseries also choose mother trees deliberately. A seed carries half its genetics from an unknown pollen parent, so a grower can only influence one side. Even so, vigorous, straight, disease-free trees with a good growth record are the usual choice.

After picking, the seeds come out of the capsules within a day or two. Nurseries typically clean off loose material, keep the seeds shaded and moist, and sow them quickly. Finally, anything that looks shrivelled, mouldy or hollow goes to the compost, not the nursery bed.

Not long. Aquilaria seed is widely reported to be short-lived and recalcitrant, which means it does not tolerate drying and cannot be stored like grain or most vegetable seed.

A recalcitrant seed keeps a high moisture content when it ripens. If it dries out, the embryo dies. If it stays too wet and warm in a sealed bag, it may sprout early or go mouldy instead. Consequently, the safe storage window is narrow from both directions.

We do not publish a germination percentage or a fixed shelf life, and we are wary of anyone who does without stating the conditions. Results depend on ripeness at picking, days since collection, temperature, moisture and the seed lot itself. The clearest rule is simply this: sow it fresh.

This is the main reason long-distance seed trade in Aquilaria is unreliable. A parcel that spends two or three weeks in transit, customs and a warm warehouse can arrive looking fine and still fail to germinate. Moreover, the buyer usually only discovers the failure after weeks of waiting at the nursery bed.

Germination is the easy part when the seed is fresh. The harder part is the following months in the nursery, when young Aquilaria plants are tender and sensitive to waterlogging, strong sun and leaf-eating insects.

For that reason, a propagation programme is best judged by the number of healthy plants that reach field size, not by how many seeds sprouted. A tray that germinates well but loses half its plants to rot has not really succeeded.

Nurseries raise plants until they are sturdy enough to handle transport and transplanting. That nursery period is exactly the work a buyer skips by ordering seedlings instead of seed.

For most new plantations, seedlings are the better start. The seed route only makes sense when you have a nursery, local access to fresh seed, and enough scale that losses do not hurt.

That is why we sell Aquilaria sinensis seedlings at $15 per plant, with a minimum order of 10, rather than seeds. To be clear, we do not sell agarwood seed. We have tried to imagine a seed shipment that reliably arrives alive in another country, and we cannot promise one.

Growers who live in an Aquilaria region are in a different position. If trees fruit nearby, collecting and sowing local fresh seed is a sensible, low-cost route, provided you follow local forestry rules on collection.

The choice of cultivar is a separate question from the choice of seed or seedling. We cover cultivar selection and seedling grades in our Aquilaria seedlings and cultivars guide, so this article stays with propagation decisions.

Seed remains the backbone of most Aquilaria nurseries because it is cheap and easy when fresh. However, seedlings from seed vary, and that variation carries through to growth rate and, in time, to how a tree responds to inoculation.

Vegetative methods — cuttings, grafts, layering and tissue culture — copy a selected tree. They cost more per plant, but they let a grower reproduce a line that has proven itself. For example, many grafted kynam plantations in southern China rely on grafting precisely because kynam-type resin traits do not reliably pass through seed.

Whichever route you choose, remember that no planting material contains oud. Resin forms only after the tree reaches working size and is wounded and inoculated, a process described in research on induction technology for cultivated Aquilaria.^[2] Our guide to cultivated agarwood tree maturity covers that later stage.

Seeds and seedlings are living plant material, so they cross borders under plant-health rules first and wildlife-trade rules second. Both sets of rules apply to Aquilaria, and buyers should check them before ordering anything.

Agarwood trees also have a conservation history. Heavy harvesting of wild trees for resin led to concern across Asia, and FAO reviews of agarwood describe how wild stocks came under pressure.^[3] Plantations exist partly because of that pressure, and good planting material is how the trade moves away from wild trees.

Phytosanitary Certificates

A phytosanitary certificate is issued by the plant-health authority of the exporting country. It states that the consignment was inspected and meets the importing country's plant-health requirements, such as freedom from specified pests.

Every seedling order we ship travels with a phytosanitary certificate. Many importing countries also require an import permit, set rules on growing media, or ask for plants to be shipped bare-root. Therefore the importer should check national rules before we pack.

Seed is not exempt from plant-health rules just because it is small. Many countries regulate seed imports closely, and some restrict seed of particular plant families. A packet of agarwood seed sent without paperwork can be destroyed at the border.

CITES and Aquilaria Plant Material

All Aquilaria species have been listed in CITES Appendix II since 2004.^[4] The listing carries annotation #14, which defines which parts and derivatives are covered and which are exempt.

The annotation has treated some plant material, including seeds, differently from wood and oil. However, annotations change at CITES meetings, so check the current annotation text before you plan a shipment. Do not rely on an old summary, including this one.

For live seedlings, we supply a CITES Appendix II export permit where one is required, alongside the phytosanitary certificate. Your own country may add import requirements on top. Our step-by-step guide to CITES agarwood permits explains the export side in detail, and national authorities such as GOV.UK publish their own import guidance.^[5]

Plan planting material backwards from your planting season. Decide when the ground will be ready, then work out whether seed, seedlings or vegetative stock can realistically arrive in time and in good health.

We grow Aquilaria sinensis on our own 100+ mu plantation, and we work with 100+ contracted plantation farmers around Dian Bai. Most of what we know about planting material comes from that daily work, not from theory.

Here is how we would advise a new grower to think about it:

• Match the species to your climate. Aquilaria are tropical and subtropical trees. They dislike frost, waterlogged soil and long dry seasons without irrigation.
• Check legal status locally. Some countries protect native Aquilaria or restrict planting of non-native species. Confirm with your forestry department.
• Start small. A trial block of a few dozen trees teaches you more about your site than any guide. Our 10-plant MOQ makes that kind of trial easy.
• Budget for time. Trees need years of growth before inoculation makes sense, and resin then needs further time to form. Do not plant on the expectation of quick returns.
• Keep records. Note the source, species and planting date for every block. Buyers of wood and oil increasingly ask where material came from, and CITES paperwork relies on legal origin.

Meanwhile, the end product shapes the plan as well. A plantation aimed at distillation feedstock can accept more variation than one aimed at carving-grade logs or premium chips.

When plantation trees eventually yield wood, the grade decides its value. We grade on our internal D, C, B, A, AAA scale, plus Kynam for allocation-only pieces, using visual inspection, aroma, resin content and the sink test. Entry-grade oud wood chips from plantation trees start from $0.24/g, while whole resinated agarwood log sections start from $88 per piece.

Those prices are not a forecast for your own trees. Instead, they show how much value depends on resin quality, which depends on years of care after the seed or seedling goes into the ground.