This year's weed

[Barndog56]

I've got an area I sprayed and haven't gotten anything to grow well yet. Two years ago crabgrass took over the area. Last year marestail went nuts there. Now it's this one's turn.

 

[Bill]

Hard to tell at this point but that could be Bidens based on the narrow leafs.
I sprayed a field once for a shrub planting and it came in heavy one summer. Not so much the next year as other weeds took over. I haven’t seen any in a few years now. But im
Sure the seeds are waiting for a chance if someone releases them.