A flowering onion crop is not ideal for a good onion harvest, but the blooms are edible, and you can still eat the onions even after they flower. As an edible plant, onions are grown as cool-season annuals in mild climates.Click to see full answer. Keeping this in consideration, can you eat the stalks of onions?Onions are a very unique plant, in that they send up cylindrical, hollow leaves very rapidly. If you have ever eaten green onions or scallions, then the plant will be very familiar to you. Contrary to what you might think, the greens of a sprouting onion are indeed edible.Furthermore, do you let onions flower? Do Not Let Onions Flower Don’t let onions flower! As soon as you see an onion has flower buds, snip the buds to prevent the bulb from splitting, then harvest and eat those onions first, the sooner the better. Onions that have bolted don’t store well. Onion bolting is a problem for even professional growers. Secondly, are onion flowers poisonous? The Allium species smell like onions or garlic—the crow poison smells musky. Also, crow poison has cream-colored flowers and the Allium has white, pink or lavender colored flowers. Zigadenus nuttallii (Death camas), however, is definitely considered poisonous. DO NOT EAT ANY PART OF IT!What can I do with onion stalks?If you find an onion with the long greens still attached (mostly in spring), don’t throw those greens away! They have a lovely mild onion flavor and you can use them just as you would use a scallion. Chop them up and mix them with Neufchâtel cream cheese to spread on a cracker or add them to fresh salsa.