Tigerwood (Astronium lecointei) is not a subtle material. The reddish-brown base color cut through with dark chocolate and near-black streaks makes it immediately recognizable on a deck surface or raised bed frame. But tigerwood is not chosen purely for looks — it is a genuinely serious outdoor hardwood with physical properties that justify its premium price for projects where longevity matters more than first cost.
This guide covers everything a buyer or builder needs to know: what tigerwood is, how its properties compare to other outdoor hardwoods, where it performs best, and what to expect when working with it. If you are evaluating materials for a deck, raised bed, or outdoor structure, this is the complete reference.
What Is Tigerwood?
Tigerwood is a tropical hardwood native to Brazil and surrounding South American countries, harvested primarily from the Amazon basin and Atlantic Forest regions. The botanical name most associated with the trade material is Astronium lecointei, though related species including Astronium graveolens and Astronium fraxinifolium are sold under the same name in different markets. The genus name reflects the scientific classification; the trade name reflects the visual character of the wood itself.
In North American lumber markets, tigerwood is also sold as goncalo alves, Brazilian tigerwood, zorrowood, and muiracatiara. These names all describe wood from closely related Astronium species with similar physical properties. For outdoor applications, the key is confirming the species group rather than relying on trade names alone.
Physical Properties and Hardness
Tigerwood registers approximately 2,160 lbf on the Janka hardness scale — the standard benchmark for comparing wood durability and surface resistance. To put that number in context: white oak scores 1,360 lbf, pressure-treated southern yellow pine scores about 1,225 lbf, and cedar — the most common raised bed material — scores around 350 lbf. Tigerwood is more than six times harder than cedar and nearly twice as hard as white oak.
Density runs 59 to 65 pounds per cubic foot, which creates real consequences for installation. A 16-foot deck board in tigerwood is a heavy, dense object that requires carbide tooling, pre-drilled fastener holes, and patience. The same density that makes installation demanding is what gives tigerwood its weather resistance — there is simply very little space in the cellular structure for water to penetrate and initiate rot.
The wood contains natural oils and extractives concentrated in the heartwood. These compounds serve as natural preservatives, inhibiting the fungal growth and insect activity that destroy less dense species. No chemical treatment is needed to achieve outdoor durability — the wood manages this on its own chemistry.
Durability and Expected Lifespan
Tigerwood is rated Durability Class 1 — the highest classification for natural rot resistance under European EN 350 standards, equivalent to the USDA Forest Products Laboratory Class I rating. At this level, the wood resists decay even in severe outdoor exposure conditions: sustained moisture, soil contact, and tropical heat. Decking and outdoor furniture built from tigerwood realistically expects 25 to 40 years of service with basic periodic maintenance.
This places tigerwood in the same durability tier as ipe, cumaru, and teak — the hardwoods used for commercial boardwalks, marina decking, and high-end outdoor furniture that needs to last decades without replacement. For gardeners building raised beds designed to last the life of the garden rather than require replacement every decade, this durability is a practical benefit with real cost implications over time.
Appearance and Grain
The defining visual characteristic of tigerwood is its dramatic figure. The base tone runs from golden amber through reddish-brown; the contrasting streaks of dark brown and near-black follow the grain in irregular, flowing patterns that vary significantly from board to board. This variation is both the material's appeal and a planning consideration — tigerwood installations require sorting and layout work to achieve a consistent visual result across a large surface.
Fresh-cut tigerwood is vibrant. Exposure to UV light over the first few months deepens and mellows the colors, settling the contrast slightly. Left untreated and exposed to weather, tigerwood eventually weathers to silver-grey like most outdoor hardwoods. Periodic oiling with a penetrating UV-stabilizing finish maintains the reddish tones and slows the weathering process considerably.
Common Outdoor Applications
Tigerwood appears most frequently as decking, where its hardness, stability, and visual drama create results that pressure-treated pine and composite materials cannot match. It is also used for outdoor furniture, pergola and arbor components, planter boxes, garden borders, and accent elements in mixed-species projects.
For raised bed gardeners, tigerwood offers an alternative to cedar or white oak that will outlast both without chemical treatment. The wood's natural oils mean it is safe for use around edible plants — no leaching concerns of the kind associated with older pressure-treated lumber. Those planning a serious raised bed installation should also review the garden calculators to determine lumber quantities before pricing out tigerwood versus alternative materials.
Frequently Asked Questions
Is tigerwood safe to use for raised vegetable beds?
Yes. Tigerwood contains natural oils and extractives that provide its decay resistance, but these compounds do not leach into soil at levels that affect plant growth or food safety. No chemical preservatives are added. Tigerwood is a good choice for raised beds growing edible crops, and many gardeners prefer it specifically because it avoids the treatment chemicals used in pressure-treated lumber.
How does tigerwood compare to composite decking?
Tigerwood outperforms composite decking in hardness, fire resistance, and visual authenticity. Premium composites have improved significantly and offer genuine low-maintenance performance, but they do not match tigerwood's surface hardness (2,160 lbf versus composites that have no comparable rating), natural fire resistance, or aesthetic depth. Tigerwood is also a natural material that can be refinished and repaired; composite boards cannot be sanded or refinished once damaged.
Where can I buy tigerwood lumber?
Tigerwood is available from specialty hardwood dealers, tropical lumber importers, and a growing number of online suppliers who ship nationwide. Big-box retailers occasionally carry tigerwood decking in limited dimensions, but specialty lumber yards and importers offer broader selection and the ability to verify FSC certification. Ask specifically for Astronium lecointei or Astronium graveolens to confirm species.