Galinsoga ?

That's it!!! Any ideas on how to get rid of it? I hear that rototilling the soil may be the only way....

A good, thick mulch will kill that plant and that mulch will also add needed organic matter to your soil, help maintain soil moisture levels, and keep the soil cooler which the plants you want to grow there will like.

Great - I'll head over to the garden centers this weekend.

Thanks to everyone once again.

I just found hundreds of these at my new garden. I'm going to remove them before they set seed.

There was a groundhog eating the tips of these, too.

I think the groundhog is a worse discovery than the weeds.