Roses
Whatever you do, the rose will flower anyway, because they do it on fresh growth and experiments with blindfolded imbeciles waving hedgecutters about showed that the badly trimmed victims showed no hard feelings. If in doubt, cut above buds, trimming your bushes back by a third. If you encounter long tentacles, try bending them over rather than cutting them off whether it’s criss-crossing on a wall, around the bush itself or over a pergola.