I agree with Joe pluck it out, it maybe a weed still in the compost. Best get rid before it sets down too many roots.
lolJust remember that Rogue Seedling is now a soap opera star. He has fans. Viewers expect Rogue. Don't cut him from the show! Allow us to follow him for the season. So what, if he's an ugly duckling. He may turn out to be a Shasta Daisy.
Bob
Bama
Those seedlings don't look very healthy even though you say they are green.The shape of the leaf is tellin me either too much water or lack or aeration(compacted mix)maybe?
The best starting/ potting mix i've used is Stein's Premium potting mix.The plant love it all the way to patch.
I would just pull the weed or pot it in good mix and see what it becomes.I'm guessin quakgrass.
Mark in Wi
I agree. The seedlings should be bigger and bushier at that stage. Something isn't quite right.
The mystery plant doesn't look like Quack grass. I don't know what it is. I got one rouge plant in a flat this year too. I use a special sterilized starting mix I buy from a local nursery so I doubt it's a weed. And it doesn't look like any weed I know. Usually I would just pull it but this one has got me curious. So I re-potted it and am letting it grow to see what it turns into.