Very thorny roses aren’t always burden to gardeners but can provide a hindrance for any unwanted guests. We have listed the most thorniest roses we grow, some are more so than others. For the most savage barbs the likes of ‘Cerise Bouquet’ and ‘R. sericea ‘Pteracantha” would make a great hedge. While unmatched in its density and size of thorns, ‘Wicker’ would be a perfect obstacle for a tall wall or structure.