Posted: 18/06/2013 at 17:48
On the point of 'greenwaste' We have a thing we call the non-compost heap. This is where all the things like dandelion roots, couch, dock etc go. It is covered up so that no water can get to it and it has been left for 3 yeras now. I have opened it up, in the past and the material is beautiful, well rotted and as far as I can tell, weed seed free. At least in the area where I have used it there are no extra dandelions etc.
Now, in theory, the heat produced in the green waste composting process, ought to be enough to kill off all seeds. I am not saying it does, but that is the theory.