Onion sets f1 centurionrhs award of garden merit winner.there is no doubt in our minds why the onion sets f1 centurion is a winner of the rhs award of garden merit. It is simply superb. Producing heavy crops that mature early, this first rate onion is very strong growing. The onion sets f1 centurion will fare well in the indifferent british summers and produce beautiful onions all the same. The even skin colour and uniform globe shaped bulbs create stunning onions, perfect as a show bench subject. Not to mention they taste absolutely great! Theyll certainly enhance any meal you add them to.