watching with interest as i'm in similar position. current reading and advice from friends suggests covering with heavy duty black pastic or growing green manure. if you rotivate an area with weeds they reckon it makes the problem worse, ie you get loads of weeds from the chopped roots....not sure if its the same with shrubs - they say its better to hand dig weed roots out.
We've finally got an overgrown bed cleared of shrubs, etc. I want to start growing veg in the spring. There are a fair number of roots from the shrubs remaining, so my plan is to hire a small rotavator, turn it all over, dig in loads of chicken manure from our hens, and put membrane over it for a few months. How does this sound as a first step? Which membrane is best?