When onion seeds replanted onions sprout, they send up tender green shoots. Green onions (Allium cepa) grow in U.S. Department of Agriculture plant hardiness zones 3 to 10. They are biennials, meaning they take two years to grow from seed to producing seed. Young onions of any number (Allium spp.) Normally grow in U.S. zones 3 to 9, although hardiness may vary by cultivar. They are perennials and are also called green onions. When harvested in their immature period, they could serve as the green blossoms commonly used in cooking and salads together with the pale slender bulb in the root and long green shirts.
Identifying Green Onions
Green onions, also referred to as spring onions or scallions, break through the ground using slender blades much like grass. As with grass, these leaves are called blades. In green onions grown from seed, a few of the sprouts may be in a loop or inchworm form until the tip of the blade appears. Blades may also have a curl in them along with also the tip may have the seed casing on it like a coat.