Does anyone have any good pictures or a link to pictures of how onion seedlings are supposed to progress? I know what good tomato and pepper seedlings should look like, but am unsure what good onions look like.
Try searching the forum for starting onions from seed. You get pages of results but somewhere in there are a handful of threads in which we had some heavy discussions about the topic and many photos. Look for DoubleDogFarm or applestar as author to start with.