Grass B Gone (Fluazifop-p-butyl, aka "floozie-flop") should be OK (Weed B Gone is not OK), but I would make sure not to get it on the roses. If you could paint it on instead of spraying, that would be best.

Would it be a problem for the liriope or is that actually a grass

Debbie, I have used grass b gone numerous times around my roses without covering them and it did not harm them.
I just take a piece of cardboard and place it between the rose and the grass I am spraying just to be safe. I'm sure there may be some overspray doing it this way but I haven't seen any damage at all.

Joe, lirope is not a grass, it is a member of the lily family.

Carol

Great, I'll use the cardboard or a bag to be careful. We have sprayed it around the liriope before with no problems.

I've used it around my roses and haven't noticed any harm to my roses. I do try to avoid as much as possible to not directly spray the rose bushes.

I've sprayed it directly on the roses and never seen the slightest bit of damage - after all, we pay extra for this stuff so that we don't have to do the whole cardboard / baggie thing, right? I only paint on when using glycophosphate (Roundup).

I've sprayed Grass B Gone directly on my roses and haven't seen any ill effects. I pretty much only use it for grass growing right in the rose where I can't use Roundup because the Grass B Gone doesn't work terribly well for me. I usually have to spray the grass twice before it starts to die.

Grass B gone takes a while-the grass has to be actively growing for it to work but it will not hurt the roses. If the grass is producing seed heads that is too late. I have Quack grass that gets into the root systems around my gallicas and I will use GBG when I have too..it can take several weeks before I see good results but patience is the name of the game...

patricia