I use approx two thirds top soil (in bags from garden centre) and one third organic farmyard manure (also from gc).
I find multi-purpose compost breaks down into dust far too quickly to be of practical use in a raised bed which you're going to use for several seasons.
Hope that helps
Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.
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Hi Patrick
Here is a useful calculator you can use. https://www.gardeners.com/how-to/soil-calculator/7558.html
I use approx two thirds top soil (in bags from garden centre) and one third organic farmyard manure (also from gc).
I find multi-purpose compost breaks down into dust far too quickly to be of practical use in a raised bed which you're going to use for several seasons.
Hope that helps
Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.
Thank you for your help