Allium schoenoprasum. Closely related to shallots, leeks, and scallions, this onion variety is used as an herb in most recipes. The pale purple flowers are edible as well, and add a delicious touch of onion to any salad. Plant somewhere spacious where they can overtake. Chives like to reign and are very handy to use fresh. This perennial is hardy and grows well in pots.