How to Pick a Mulch: Organic vs. Inorganic for Your Landscape

What Is Mulch?

Any topdressing—organic or inorganic—that conserves moisture, stabilizes temperature, reduces erosion/compaction, prevents weeds, and adds design unity.

Organic Mulches

Types: Wood chips, bark, pine needles, shredded cedar, aspen chips, arborist trimmings, compost, grass clippings, nut hulls, corn cobs, seashells.

Pros: Permeable, adds nutrients as decomposes, doesn’t radiate heat, lightweight, often cheap/local.

Cons: Decomposes (replace yearly), may harbor pests.

Coverage: 1 cu yd ≈ 100 sq ft at 3 in.

Design: Soft, rustic—good for informal or contrast in modern designs.

Maintenance: Replenish annually, tidy after wind/rain, spot‑spray weeds.

Inorganic Mulches

Types: Rock (decomposed granite, crusher fines, cobblestones, riprap), recycled glass, rubber, crushed concrete.

Pros: Permanent, stable in high wind/fire, wide color/texture range.

Cons: Absorbs/radiates heat, heavy (may need pro install).

Coverage: 1 ton 1.5‑in rock ≈ 55 sq ft at 3 in.

Design: Mimics natural arid landscapes; creative stripes, tone‑on‑tone textures.

Maintenance: Blow debris weekly, spot‑spray weeds.

Landscape Fabric

Helps suppress weeds, keeps inorganic mulch from sinking. Not effective in dense plantings.

Choosing

Match mulch to climate, plants, design, budget. Local sourcing saves money and fits ecology.