The green stalks and the white bulbs of the green onion are edible. The brown roots of this vegetable can be eaten, but must be cleaned well, as they grow in soil.
Green onions have a mild flavor and grow easily outside and indoors. This vegetable is used in a variety of recipes and as a garnish.
The blossoms which grow on the onion flower are also edible. The flowers are often added to leafy raw salads.
There are an estimated 32 calories in a 1 cup serving of green onion. The same serving size contains 276 milligrams of potassium and 31 percent vitamin C.