I would use good quality topsoil and as much well-rotted manure as you can get if you're effectively creating your soil from scratch. That will give your garden a perfect start and all you need to do is top-up with a 2 inch layer of more well-rotted manure each autumn. Use more manure in the areas which will be beds or borders etc. Local suppliers of topsoil will be cheapest but inspect it if you can before buying/accepting. It should be reasonably loose and crumbly with no large stones, bits of wood or roots etc. You can substitute some of the manure with other organic matter such as mushroom compost or even cheap multi-purpose compost but that will only improve soil structure and does little to improve fertility in the long term (MPC contains fertilizer which is gone after about 6 weeks.)
thanks much! this is all great info i want to grow some Quinoa also if anybody knows much about this ?
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