I want to grow a green manure just so that something is growing in the plot - which will help stop weeds growing, the soil blowing away, and keep moisture in.
Many green manures enrich the soil with something in particular... if you've been drawing a nutrient out of the soil with a particular crop for instance.
Buckwheat is good for calcium, clover survives in poor soil and damp conditions and there are loads of others .... I'll probably go for Hungarian Grazing Rye, but wanted to know if other growers rated something else better.
I don't need to enrich the soil... I just want a cheap "filler".