Well, I've grown them every year since 2008, and repeated recommended them on here
![happy :)](https://chat.allotment-garden.org/Smileys/green/smile.gif)
I net mine until we've seen the last of the cabbage white butterflies, but I don't cover them through winter. The birds seem to leave them alone on the plot and in the garden
![happy :)](https://chat.allotment-garden.org/Smileys/green/smile.gif)