The onion is a biennial plant but is usually grown as an annual. Modern varieties typically grow to a height of 15 to 45 cm. They are fleshy, hollow, and cylindrical, with one flattened side. They are at their broadest about a quarter of the way up, beyond which they taper to blunt tips. The base of each leaf is a flattened, usually white sheath that grows out of the basal plate of a bulb. From the underside of the plate, a bundle of fibrous roots extends for a short way into the soil. As the onion matures, food reserves accumulate in the leaf bases, and the bulb of the onion swells.

This is Very Good Quality onion, I have available on Best Priceses There are a number of commercial varieties and cultivars of onions available: Globe-shaped onions may be white, yellow, or red. They have strong flavour and are used chiefly for soups, stews, and other prepared dishes and for frying. Bermuda onions are large and flat, with white or yellow colour and fairly mild taste. In the autumn, the leaves die back, and the outer scales of the bulb become dry and brittle, so the crop is normally harvested. If left in the soil over winter, the growing point in the middle of the bulb begins to develop in the spring. New leaves appear, and a long, stout, hollow stem expands, topped by a bract protecting a developing inflorescence. The seeds are glossy black and triangular in cross-section. The average pH of an onion is around 5.5.