Natural Materials Sourcing: What Canadian Artists Collect and Why

The material palette for natural-materials art in Canada extends well beyond driftwood. Artists working in this tradition draw on whatever the surrounding environment offers — and Canada's range of environments means the options differ considerably from one region to the next. A sculptor on the Sunshine Coast of BC is working with a different set of raw materials than a counterpart in northern Ontario or along the New Brunswick tidal flats, even if the conceptual territory overlaps.

Driftwood: The Most Studied Material

Driftwood gets the most attention in documentation partly because it is visually distinctive and partly because coastal provinces have generated the most organised communities of artists who work with it. The material arrives pre-conditioned by water, salt, and sun — a process that takes years and is not replicable in a studio. This gives collected driftwood a surface quality and colour range that distinguishes it immediately from kiln-dried or milled wood.

In British Columbia, the dominant species are Western red cedar, Sitka spruce, and Douglas fir. Cedar is the most prized for its stability after drying and its resistance to decay; it also has a distinctive reddish inner wood that contrasts with the bleached exterior surface. Spruce pieces tend to have a more uniform grey and are slightly denser than cedar for the same volume. Fir is heavy relative to the others and is usually selected when structural load-bearing capacity is needed in a large piece.

On Great Lakes shores, the mix shifts toward hardwoods — ash, oak, maple — that have different weathering characteristics. These tend to hold their surface colour longer and check less aggressively than softwoods during drying, but they are considerably heavier and take longer to prepare.

Birch Bark

Birch bark is collected in central and northern Canada — Ontario, Quebec, Manitoba, the Northwest Territories — where paper birch is abundant. The bark is harvested from fallen or already-dead trees rather than living ones. Removing bark from a living birch can kill the tree by interrupting the cambium layer's function; this is also the point at which collection becomes regulated under provincial forestry law in several jurisdictions.

Bark collected in autumn has the best structural quality — it has dried naturally over the summer and retains flexibility without brittleness. Spring-harvested bark from a recently fallen tree is pliable enough to roll and form, which is useful for three-dimensional structure but requires careful storage to prevent mold formation during the drying period.

Artists use birch bark for surface cladding on larger wood sculptures, for basket-like containers that use the bark's natural curl, and as a flat-sheet material when pressed and dried under weight. The outer surface is white to pale grey; the inner surface has a warm ochre-brown tone that is distinct in colour character from anything the outer face suggests.

Stone: River Granite and Coastal Slate

Water-worked stone is collected from river beds, glacial outwash plains, and exposed coastal ledges. River-polished granite from the Canadian Shield — common in northern Ontario and Quebec — has a surface that is smooth to the touch in a way that hand-sanding never reproduces, because the polishing medium is a mix of sand, other stone, and water pressure applied over decades rather than hours.

Lichen-encrusted slate and shale from coastal exposures in Nova Scotia and BC provide flat, layered material with surface texture that ranges from rough grey to a mineral-deposit orange where iron content is high. Slate splits along natural cleavage planes, which gives it a degree of workability with simple hand tools that granite lacks.

Weight is the practical constraint with stone. Artists who include stone in mixed-material work typically limit piece size to what they can transport by hand, which keeps most individual stone elements under four kilograms. Larger pieces require two people and are rarely used in works that need to be moved after installation.

Organic Additions: Seed Pods, Bone, and Root

Smaller organic elements — seed pods from Douglas fir, the seed clusters of western hemlock, dried kelp holdfasts, sun-bleached bone fragments from wildlife — appear in detailed and smaller-scale work where texture and pattern at close range matter as much as overall form. These elements are generally collected on the same expeditions as driftwood and stored dry until needed.

Exposed root structures from storm-toppled trees are a source of complex, branching organic forms. A root ball pulled from a cliffside by erosion may have geometry that took sixty years to develop and cannot be replicated by any shaping process. This is the material artists describe as having already done most of the compositional work.

Regulations and Responsible Collection

Collection is regulated differently across Canada's provincial jurisdictions. In British Columbia, material removed from Crown land, including most foreshore areas, requires a permit from the BC Ministry of Forests above a de minimis volume that is defined inconsistently across different land-use zones. Parks BC prohibits removal of any natural material from park boundaries.

In Ontario, the Public Lands Act governs material on Crown land; forestry residue and naturally occurring materials are addressed under separate sections that distinguish between commercial removal and personal use collection. Nova Scotia's Beaches Act restricts removal of sand, gravel, and associated material from provincial beaches.

The BC Natural Resource Stewardship guidance and each province's equivalent resource ministry are the authoritative starting points for confirming what is and is not permitted before collection begins.

Storage and Preparation

Collected organic material needs to be stored in a way that allows continued drying without encouraging mold. Good practice is to stack pieces on timber battens with space between them for air circulation, under a covered roof with open sides. Fully enclosed storage slows drying and concentrates any residual moisture that the wood or bark gives off, which is the primary cause of mold in stored natural materials.

Stone and mineral material requires no special storage beyond keeping it off damp ground and out of standing water, which can cause mineral migration and surface staining.