We had a lot of crops lost last year on our allotments to root fly, so this year I have planted all the cabbage, cauli and sprouts with bottomless yogart pots round them. Put the plants in as normal, cut the bottom out of a yogart pot or something similar and thread it over the plant, screwing it down into the ground an inch or so, this also supports the plant against the winds. Up until now I have not lost a plant this year, will probable go up tomorrow and find the rabbits have eaten them all :D
I read about this last year but can't remember where , anything is worth a try to stop this pest.
