Rooting fruit trees: when do I put them out in their forever spot?

So, I've got a bunch of scions and some new growth tree cuttings under a clear plastic bin attempting to root. Not thinking too far past my nose, I put the cuttings in some red, plastic Solo cups so I can't see root growth. New leaves are beginning to form on the scions and the new growth cuttings are turning their few leaves upwards. I believe I have success, but that's a measured guess at this point. This is my first serious attempt at rooting fruit so I'm kinda unsure at what I'm looking at. Nature has a way of throwing so many rights you'll be begging for a left.  I am seriously excited about my current rate of assumed success! If more people knew how fun this stuff was there'd be a lot more here!

Assuming all goes well, the planets align and a miracle happens when should I be thinking about the final resting place for my trees? Or should they go into a burlap lined 5 gallon bucket for a year?

i’d pot them up and grow them out for a year, just so they can compete better once they’re out. it’s possible for cuttings to leaf out, not root, and crash hard...until you see roots, you’re not out of the woods yet.

Thanks Greg, that's what I was afraid of  How long would you think it would be before rooting happens if it's going to?

That's going to depend on what you're growing. Some trees will root immediately, while others will take as much as two years. I have an elderberry cutting in my front yard that I'd given up on, planted two years ago (spring of 2019). But here it comes, with strong growth. Pistachio starts haven't taken off yet and I suspect they're dead. Apple, peach, pear, cherry? What are you growing?

if you get new stems with multiple leaves on them, you’re probably okay. you can always wiggle/lightly spin cuttings you think have rooted. if they have roots, they shouldn’t move freely. obviously, try not to do it vigorously enough to damage roots if they are there.

Right now, just pear and plum.

If they are in a potting soil type of medium, you should be able to put your hand over the top of the pot then turn it over and give it a little shake, and the pot should come loose while leaving the soil plug in mostly one piece. Do this method before watering, when the soil plug has dried out slightly, as the plug will hold together better.

Otherwise you can do the "tug test", which is best suited for a fine or lightweight rooting medium like sand or perlite (so you can easily pull the cutting completely out of the medium without breaking any roots)