Onion sprouts are among the most flavorful of all sprouts. A sprouted onion seed is like a very tiny onion or scallion, but not quite so powerful. They make an excellent addition to salads, and onion sprouts can be substituted for onions in any salad and are a high in minerals and vitamins A, B, C, and E.
Onion sprouting seed has shorter shelf life than most types of sprouting seed. Storing the seeds in your freezer will extend their shelf life. Shelf life is usually over a year, even without freezing. After that time, the germination rate begins to decline.
Onion sprouts are slower growing sprouts, sometimes taking a week an a half to grow to a full sized sprout but well worth the wait.