"No dig" in Pots

I'm no purist either, or a disciple of CD, so, if I had a ready supply of cardboard, I'd be doing the same.

Plan 'B' which is more purist I suppose is to lift my onions, cover beds with cardboard and cover cardboard with a thick layer of hay (A La Ruth Stout who didn't even use cardboard!)
It just so happens that I have spent a good few hours today cutting/hacking down my mini wildflower meadow at home and have a dozen large bags of hay!  I like to cut it once a year after stuff has flowered and dropped its seeds. There will be quite a few seeds in the hay but some will have filtered through to the meadow soil hopefully? I have some nice tuberous orchids transplanted in it which I am hoping will re-appear next year.
The green grass I cut off the main lawns has been taken to the allotment and now surrounds the leeks, beetroot and savoy cabbage plants.