They look good. I would consider repotting them into their own nursery pots in the spring. It will give them more room to grow and after another year they will become difficult to separate without damaging the roots. It will give you an opportunity to do some work on the roots like remove the tap root.
If you're cheep, like me, stop by a local nursery and ask if they have any used nursery pots that they want to get rid of. I got about 50 4" pots for about 5 cents each. They might even give you some for free. I've been known to walk around on recycling days in the spring and fall to do some dumpster diving.