Spring or bunching onions are arguably among the most underappreciated vegetables from salads to stir fries they can transform a range of culinary dishes and this scallion is no exception its green leaves and stems are upright and mild with no bulbs onion 39performer39 which is also known as allium fistulosum is a hardy perennial this quality means that in most gardens it will grow almost all year especially when coupled with mint to ward off onion fly height 30cm 40139