Scottish growing tool

Bed Area Calculator

Measure your bed, and this works out its area and how much garden compost or well-rotted manure to add: dug in or as a surface mulch.

A standard raised bed is often around 1.2m (4ft) wide: easy to reach the middle from either side.

Sources

Digging-in and mulching rates, and the compost/Growmore nutrient comparison:

Mulch depth and bag-size corroboration:

Why there's no numeric fertiliser rate here: general granular feeds are sold with a nitrogen/phosphorus/potassium strength printed on the bag, but no standard application rate, since that depends on the specific product, so this tool doesn't invent a figure no one else publishes.

Cost estimate: bagged manure/soil-improver prices checked live at two major UK retailers on 2026-08-05. Prices move with stock and offers, so treat this as a ballpark, not a quote:

Next steps

Related toolCheck your soil's pH too → Soil Amendment CalculatorCompost improves structure and feeds soil life, but it won't fix a pH that's wrong for what you're growing.
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