i always get the jonhnsons autumn mix, works well but not completely hardy if it freezes before it's done it's job...if it's all grown up and then dies it makes life easier.
they were sold out this year so got a new mix from a seedcompany that mixes their own, it has 7 kinds of seeds, but they're a dutch company so not much use to you i'd guess...
maybe seedparade can take up green manure ;-)
well there's different opinions about that cos of crop rotation and that might dictate what you sow, but i;ve used above mentioned for years and found no problems. if you have grasse sin the mix there is no veg in that familie.
but sometimes there are plants from the brassica familie which can keep clubroot alive, and they recommend 4 years between them (you know growing the veg and before you sow greenmanure, this is for light soils very true/important).
ans there's what we call butterfly flowering plants (not sure what it's in english) which can cause trouble for bean and pods, that's the theory anyway