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try fenugreek for the clay soils
What a beautiful, prosperous looking plot. I am seriously getting into the green manure idea…we live on the crest of a hill, mainly rock, some gravel/poor sand and random blocks of clay. Wind is a perpetual problem, so we have been planting our boundaries with a thick cover of natives that will survive on little or no extra water. I am composting and mulching, but feel the green manure will be of benefit. Am thinking Lupins at this point.
Variety is the key
Think of it as different plants mining the sub soil for minerals, that they bring to the surface.
Different plants have different minerals in them.
You then mulch on site and add to the topsoil, for the shallow rooted delicate plants to use, that you want to eat.