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Sizer

Compost Bin Sizer

How much compost capacity do you actually need? Most home setups are too small — and compost is the single best soil improvement you can make.

Small: courtyard / front garden. Medium: standard back garden. Large: ¼ acre+.

Productive = veg, fruit and lots of borders.

Recommended setup
Twin-bay or three-bay wooden system

833 L total capacity

  • 1× Two-bay wooden bin (each ~700L)
Kitchen waste
240 L

Per year

Garden waste
950 L

Per year

Finished compost
357 L

Reduces to ~30% of input

Get the mix right

Two parts "brown" (cardboard, dry leaves, straw, woody prunings) to one part "green" (grass clippings, kitchen scraps, soft prunings). Most failed compost heaps fail because they're too wet and too green — slimy and smelly. Add brown until it stops.

A two- or three-bay system isn't excessive. Bay 1: this year's additions. Bay 2: rotting down. Bay 3: ready to use. Turn from one to the next once a year and you have a permanent self-renewing supply of free compost.

What to keep out: meat, dairy, cooked food (rats), perennial weed roots (couch grass, ground elder), diseased material, dog waste.

We can build you a bay

Hand-built timber compost bays from scrap or new — 1, 2 or 3 bays, sized to your garden.

Discuss compost bays