Fred will correct me if I'm wrong of course
and can add more to it as well.
A daylily seedling is an unregistered daylily. It will always be refered to as a seedling for as long as it is around if it is not registered with AHS and given a name.
Most of the time when a daylily is planted in the fall it will bloom the next spring, but sometimes they don't. It depends on your zone. Now seedlings are different since they have to grow to a mature plant. Fred usually sees blooms the first year if they are planted in the ground in time. But in more northern climates it take 2-3 years to see blooms on seedlings. All daylilies are different in how they increase and form clumps. I've had some that I planted last fall as a double fan and they are now 8-10 fan clumps. And then I have some that have only increased by 1 fan. Again, zones play a big role in it. Here in the South (unlike the last 2 years) it doesn't get very cold so our season starts earlier than the colder climates. Now as far as blooms go, you can have a 1 year old daylily produce tons of blooms especially if they have rebloom. It depends on bud count as well; some have 10-15 bud count and some have 40 bud count. I had one older daylily that was a nice clump produce 1 scape with 2 blooms. General rule of thumb though is give a daylily at least 2 years. A lot of times the first year it's planted (even if it came from a mature plant) it could have less blooms, shorter scapes, duller coloring and such. Hope this answers some of your questions.
Very good Michele!!! 
