Posted: 13/05/2014 at 19:21
Do you mean Purple Sprouting Broccoli? Or Purple Brussell Sprouts? Either way, they are both prone to attack by pigeons and snails. I have just planted out mine, after hardening them off by having them out during the day and in at night for a few days. I have sprinkled slug pellets around and covered them with netting (to also protect against the cabbage white butterfly whose caterpillars can eat a small plant pretty fast.
All this may make you think it is not worth it, but these precautions don't take long to put in place and the results will be delicious veg up till Christmas and beyond.
Both the plants mentioned above grow quite large and may need staking in a pot.