Are scallions baby red onions and are spring onions baby yellow onions?
Scallions and spring onions are both onions that are specifically cultivated and made to grow without actually producing a bulb (although as an avid gardener, if you leave them in the ground long enough, a very small bulb will eventually form)…they are not a baby version of any other onion. In most areas the terms scallion and spring onion are interchangeable, though true scallions are less likely to form a bulb than a spring onion. Most people will just tell you they’re the same thing, and again, in most areas the two onion terms are used interchangeably.