How do you get rid of Rose of Sharon and Sunflower seedlings?

I have a massive Rose of Sharon, and now I have hundreds of seedlings coming up. I don't mind the ones in the lawn, but they're in my rose garden and my flower beds. I've read to deadhead them, which I'll start doing this year, but I'm hoping for a quicker fix for the seedlings that are already growing. I weeded for an entire day and still have more coming up. I tried Roundup, but it didn't seem to do anything. Is there a different spray I could use to kill the seedlings but not the plant? Also, I have a bird feeder in the same bed, and the sunflower seedlings are killing me. Again, is there a spray that would prevent them from coming up?

How do you get rid of Rose of Sharon and Sunflower seedlings?
I pull them out of my azelas all the time. They hurt when pulling! I have tried for years to rid my garden of them and the four o'clocks too.
Reply:For the sunflower issue..get the kind that has the shell removed. They wont grow if they fall.



As far as the rose of sharon..dig them up..if they are young seedlings, they wont have deep roots.
Reply:There is no way to kill them. I suspect you have so many because the birds at the feeder a probably picking at the dry seed pods as well and sprinkling the seeds everywhere. Perhaps moving the feeder might help. Deadheading would also help so it should be better next year. For this year you will have to pull them up. Make the best of the situation by selling them on eBay for a small profit!