How this estimate works

Raised-bed volume is inside length × inside width × fill depth. Check whether the supplier sells cubic feet, litres or bags; settling and top-up needs vary by mix and site.

Worked example

A 4 × 2 foot bed filled 10 inches deep needs about 6.7 cubic feet before settling or top-ups.

Common mistakes

Measuring the outside instead of the usable inside dimensions.
Filling to the rim or forgetting the recommended spacing and drainage needs.
Treating volume as an exact number of bags without checking package size.

Questions to check

What should I grow? Match the crop to your sunlight, climate and container depth. When should I plant? Check your local cooperative extension or USDA zone guidance; frost dates vary within regions.

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