Alder

Wood Type

Alnus rubra / Alnus glutinosa

Alder trees belong to the genus Alnus in the family Betulaceae, a group of flowering trees that also includes birches, hornbeams, and hazels.

Red Alder: Alnus rubra

Black/European Alder: Alnus glutinosa

Alder wood is prized for its straight grain, light weight, and surprising workability. Often overlooked in favor of flashier hardwoods, alder quietly earns a reputation among craftspeople as one of the most cooperative and versatile woods in the shop.

Janka Hardness

Red Alder: 590 lbf

Black/European Alder: 670 lbf

What is Janka hardness?

Color

Cut alder open and it's almost white. Leave it an hour and it blushes warm amber. The sapwood and heartwood are nearly indistinguishable, making alder one of the most uniform-looking hardwoods available. Limiting dramatic streaks, jarring contrast, for just a clean consistent tone.

Flexibility-Stability

Alder bends reasonably well with steam, making it suitable for curved furniture components and instrument parts. It dries quickly and with minimal degrade. Once dried, alder is dimensionally stable and resists warping well for a lighter-density hardwood, a trait that makes it a reliable choice for cabinet doors and panel work.

Region

Red Alder is native to the Pacific Coast of North America, from Alaska down through California, thriving in the moist forests of the Pacific Northwest.
Black/European Alder is native to Europe, Southwest Asia, and North Africa, commonly found along riverbanks and wetland margins.

Tree Size

Red Alder typically reaches 40–60 feet in height, with a trunk diameter of 10–18 inches. European Alder grows similarly, reaching up to 65 feet. Both are relatively fast-growing trees, often maturing in 60–80 years.

Grain

Generally straight and uniform, with a fine, even texture. Alder has a modest natural luster, not flashy, but quietly refined. The grain is rarely figured, which makes it an ideal canvas for stains and paints. Its consistent surface takes finish exceptionally evenly, without the blotching common in other light-colored woods.

Useability

Few woods are as agreeable to work with as alder. It cuts cleanly, sands fast, and doesn't fight the glue or the finish. It's one of the only pale hardwoods that accepts stain evenly with no blotch, no surprise. Cabinetmakers reach for it when they want a reliable result. Guitar builders have trusted it for decades. Fender built the Stratocaster's reputation partly on alder's light weight and balanced tone.

The Pioneer Wood

Alder is an ecological pioneer. After a landslide, fire, or flood strips a hillside bare, alder is often the first tree to move in. It fixes atmospheric nitrogen through root nodules, a rare ability among hardwoods, enriching depleted soils and making way for the conifers and hardwoods that follow. In the Pacific Northwest, red alder is a critical part of forest regeneration.

Underwater Forever

Leave alder in the rain and it rots. Sink it underwater and it lasts centuries. Venice has stood on alder pilings for hundreds of years, the wood preserved perfectly by constant submersion. It's one of woodworking's stranger facts: the same species that won't survive a wet porch has been holding up one of the world's great cities since the Middle Ages.

The Dye Wood

Alder bark has been used for centuries as a natural dye, producing rich tones of red, orange, yellow, and brown depending on the mordant used. Indigenous communities of the Pacific Northwest used red alder bark extensively to dye fishing nets, baskets, and clothing, and to smoke fish, where the wood's mild, sweet smoke imparts a clean flavor without bitterness.

Regenerative by Nature

Red alder is one of North America's fastest-cycling hardwoods. It reaches harvestable size in as few as 30–40 years, making it one of the more renewable options available to small-batch woodworkers. Its nitrogen-fixing roots actually improve the soil it grows in, leaving the land in better condition than it found it.

Alnus: Tree of Death

The Alnus genus contains roughly 35 species of deciduous trees and shrubs. Most species fall into one of two categories: upland alders, which colonize disturbed nitrogen-poor soils, and riparian alders, which line riverbanks and wetland edges. All alders produce distinctive woody cone-like catkins, technically called strobiles, that persist on the tree through winter long after the leaves have fallen, making them easy to identify in any season.
Alder species are found across the temperate Northern Hemisphere. Red Alder dominates the Pacific Coast of North America, colonizing stream banks, logged hillsides, and coastal forests from Southeast Alaska to central California. European Alder (Alnus glutinosa) ranges across Europe and into western Asia, thriving in wet lowland forests, riverine habitats, and fenland margins. Both species are deeply adapted to wet soils and perform best where their roots have access to consistent moisture.
Alder wood punches above its weight economically. In the Pacific Northwest, red alder is the most commercially important hardwood, used extensively in furniture, cabinetry, millwork, and turned goods. It is the dominant tonewood for electric guitar bodies. Fender Stratocasters and Telecasters are traditionally made from alder, valued for its balanced acoustic resonance and light weight. Beyond woodworking, alder is used in paper pulp production, charcoal, and as a smoking wood in food preparation.
Alder's ecological value is outsized relative to its modest profile. Its nitrogen-fixing root nodules, formed through a symbiotic relationship with the soil bacterium Frankia, enrich the soil around it, enabling more nutrient-demanding species to establish after it. Alder leaves break down quickly and release nutrients rapidly, supporting rich understory plant communities. Alder stands along waterways are critical buffer zones, stabilizing banks, filtering runoff, and providing shade that keeps stream temperatures cool enough for salmon and trout.
For Indigenous peoples of the Pacific Northwest, including the Coast Salish, Haida, and Tlingit, red alder was a wood of practical and spiritual importance. It was used for smoking salmon, carving masks and bowls, and dyeing materials with its vivid bark pigments. Red alder bark was also used medicinally, with preparations applied to treat skin conditions and internal ailments. In European folk tradition, alder was associated with water spirits and the boundary between the living world and the underworld, likely because of its uncanny habit of thriving where other trees drown.