Best way to rot down weeds?

You say you cant burn them... what reason?

The new plot is quite close to houses, and I need to keep on good terms, so I've ruled out burning for the foreseeable future!

Thanks for all the people who replied. From what you've said, I'm going to take the easier option and try to compost them on site. In a few years time I may have compost, I may have weeds...we'll see.

From now onwards, there should (hopefully) be a lot fewer weeds so I think I'll go down the green bin route for those.