permaculture

["Cesca Beamish" <cesca@cornerplotvegetables.co.uk>]

Hi,
 you say - 'He recommends we grow our own materials for composting by using
space-efficient crops which will produce a large amount of biomass per unit
area. '
Has anyone any suggestions on plants (for mid uk) suitable for growing for
mulching material? I have sown a couple of beds of wheat and have got
patches of comfrey any/every where but looking for other possibilities

thanks 
Cesca