Ok, city boy trying to manage a flagstone porch..once i spray round-up on weeds, what next? pull? nothing?

Question

Ok, city boy trying to manage a flagstone porch..once i spray round-up on weeds, what next? pull? nothing?

Answer 1

Let it sit, they should die within a few days time.  Then, you can either pull them up, or let them wither and flake away on their own.

Use gloves, some of 'em are spiny as h**l.