Hi,

I have a Chinese Elm, I only have it 3 weeks or so and is my first bonsai, really enjoying it so far..

I've noticed theres quite a few seedlings starting to sprout in my pot, I'm wondering are they weeds and should I remove them??

Or is there a chance they could be elm seedlings??

Picture attached

Thank you

Whatever it is, you can remove it!
Second: if your tree stays on that window sill it will die, trees belong outside

Weeds, pull them off.