This year I decided to try growing some plants directly from seeds for the first time, the first guinea pig was Blue Fescue which I would like to use throughout my property but don't necessarily want to pay for matured plants. I started the seedlings a couple weeks ago in 3" pots in my garage under an LED plant light and they've recently sprung up (rather impressively I must say).

Here's my question: I wasn't very gentle with my initial waterings and the seeds ended up scattered throughout the pots and now there are seedlings popping up all over the place. I'm sure in some of the more populated pots that there is definitely more than one plant growing. Should I attempt to split these up? If so, at what point should I do that? Or should I just let nature take its course and see how they turn out?