Being the novice that I am, I made more work for myself by planting green onion seeds instead of sets. While I've had a little luck getting plants to sprout and grow, it seems like it's only a 50% grow rate. Next year I'm going to have to use sets - from what I've heard and read this seems to be the easier way to go.
I planted the seeds back in March and I currently have 5 or 6 plants that look like they'll make it to harvest. I tend to baby these guys because they limp along and the starlings have taken to nipping off the tops of the stalks.
Here's a peek (I've sandwiched them in the middle of my lettuce):