Hi Mateo
Not sure where you are based, we are in south wales and I had Greek and land cress, Chervil and frizzy mustard outside they were doing great without any protection, then the rabbits attacked!!! Interestingly the Rabbits did not touch the Land cress, they loved the mustard and chervil and Greek cress though. The land cress is growing fast now and looks healthy. We have manged to get something to eat from it all winter, I would recommend land cress to over winter and I see that Charles grows this as well. GOOD LUCK