Aquilaria Seeds | Agarwood, Aloeswood
LATIN NAME: Aquilaria
COMMON NAME: Agarwood, Aloeswood
Plant Profile
This rewrite stays on the resin, the grades, the oil, and the market, and deliberately leaves seed and planting to the companion article.
An uninfected Aquilaria trunk is light and loose, with almost no scent, so a standing tree gives no hint of the value locked behind a future wound, and most wild trees were once cut open just to learn which had responded. The pale wood is the baseline; the dark freight is the exception. Grading starts from this contrast.
The chipped resin wood is distilled, usually by slow steam, to yield oud oil, the most concentrated and costly form of the scent, and the spent chip still carries a base note for incense. The distillation protects the fragile top notes by keeping the heat low, and the oil is the luxury end of the same wood the chip trade sells. A kilo of fine oud oil comes from a heavy pile of chip.
Because wild natural agarwood is scarce, plantations now wound the trunk on purpose to push the tree into resin, trading the old random luck for a managed, repeatable response once the tree is old enough. The wound is controlled so the tree survives and keeps producing, and the method turns a rare wild find into a farm crop. The trigger is the same biology the wild tree uses.
The tree is harvested only after the wounded wood has darkened and the resin has set, because cutting too early yields pale, scentless tissue that no grade will save, and the wait is the cost of the method. The dark vein is the signal, confirmed by a small test chip before the whole stem comes down. Patience is the margin.
Science & Biotechnology
The resin forms when a wound, from break, bore, or cut, lets a fungal infection enter the wood, and the tree responds by laying down resin-rich tissue around the lesion to wall it off. The fungus and the wound together are the trigger; neither alone gives the dark wood, which is why natural agarwood was always rare and random. The chemistry is a defense, not a perfume by design.
Uses & Benefits
Agarwood is not a normal wood but a wounded wood: a healthy Aquilaria trunk is pale and almost scentless, and only after injury plus a fungal infection does the tree flood the wound with dark resinous tissue that carries the fragrance, which is the single most remarkable fact about the whole trade. That response, not the tree itself, is the oud everyone pays for, and the resin is the tree defense, not its natural state.
The resin-heavy wood is graded by how dark and oil-rich it is, and the old trade names the top two trade grades mark the top tiers prized in the incense world for a sweet and complex lingering scent. Below those lie many local grades scored on density and oil bleed, and the name on the billet tracks the resin fraction more than the species. A high grade is mostly resin, barely wood.
Graders read a billet by its oil bleed, its weight in the hand, and the depth of the dark vein running through the pale wood, because resin is heavier and darker than the plain tissue. A chip that feels dense and shows a broad dark core outranks a pale, light one, and the scent test confirms the read. The eye and the nose agree at the top end.
The darkest billet is not always the best, because over-infected wood can rot and lose the clean scent, so grade balances color against a sweet, non-sour aroma and a firm body rather than a crumbly one. A slightly lighter, resin-clean piece often beats a near-black rotten one in the bowl. The nose settles ties the eye cannot.
In incense the chip is burned on coal or in a mabkhara for a deep, fixed aroma, while in perfumery the distilled oud sits in the base of niche and luxury compositions where a little carries far. The market pays for resin content and for a clean, sweet profile, and adulteration with cheaper wood or synthetic is the constant risk buyers guard against. Oud is the prestige wood of the trade.
Growing from Seed
Many plantations go further and inoculate the wound with the resin-inducing fungus so the response is reliable rather than left to chance infection, a biotech step that shortens the wait for a usable billet. The inoculated wood still has to mature and darken, but the hit rate climbs versus a plain cut, and the grade can be steered. The fungus is the tool, the wound the door.
Our Take
For the growing end of the same tree, the agarwood seed article covers propagation, the aquilaria sinensis seed is the species source, and the sandal tree seed is the other luxury-wood nursery.
Related Reading
More species in the same orbit as Agarwood: