Compost vs Crusher Run: Size, Cost, and Which to Use

Compost

Decomposed organic matter used as a soil amendment to improve soil structure, fertility, and water retention. Quality compost is dark, crumbly, and earthy-smelling. It adds beneficial microorganisms and nutrients that support healthy plant growth and improve poor soils.

Crusher Run

Crusher run is crushed stone with the rock dust left in, sold as 3/4 inch minus or 1.5 inch minus. It costs $20 to $35 per ton in 2026, weighs 1.5 to 1.7 tons per cubic yard, and packs into a surface hard enough to drive on year after year. It is the standard base under roads, driveways, parking lots, and patios, and the best single-layer material for a gravel driveway. In the Southeast it is called crush and run. Highway departments call it aggregate base course, ABC, or Class 5.

Compost

• ✓ Soil amendment
• ✓ Garden beds
• ✓ Lawn top-dressing
• ✓ Raised beds
• ✓ Tree and shrub planting
• ✓ Seed starting mix

Crusher Run

• ✓ Driveways
• ✓ Parking areas
• ✓ Road base
• ✓ Paver base
• ✓ Walkways
• ✓ Shed and equipment pads

Compost

• + Dramatically improves soil structure and fertility
• + Increases water retention in sandy soils
• + Improves drainage in clay soils
• + Adds beneficial microorganisms
• + Reduces need for chemical fertilizers

• − Quality and composition vary widely between sources
• − Can be odorous when fresh
• − May contain weed seeds if not fully composted
• − Too rich for direct planting — must be mixed with soil
• − Settles significantly after application

Crusher Run

• + Packs into a hard, drivable surface
• + Cheapest processed stone at $20 to $35 per ton
• + One layer does the whole driveway on firm ground
• + Grades smooth and repairs easily
• + Stocked at every quarry

• − Does not drain, sheds water instead
• − Dusty when dry, muddy when wet before it seals
• − Dense, so a ton covers less area than clean stone
• − Wrong choice for any drainage use
• − Plain gray look

Compost

Fine, crumbly texture when fully decomposed. Dark brown to black color. Should smell earthy, not sour or ammonia-like. Screened compost has been filtered to remove large uncomposted pieces. Mushroom compost is a byproduct of mushroom farming and is particularly nutrient-rich.

Crusher Run

Crusher run is everything that comes off the crusher below a set size, usually 3/4 inch minus or 1.5 inch minus: angular stone at the top of the range down to sand and rock dust. Roughly a third of the mix is fines. Color matches the quarry rock, typically gray limestone or gray to tan granite, and it lightens as the dust dries.