How long to do I have to wait?
I've had it with my front foundation bed! For one the builders (about 3yrs ago) had plopped azaleas in thick clay and despite trying to add some compost around the shrubs they have grown very little in the last 2-3 years or so. I think after digging one out that they were also very rootbound. Second, along the foundation is this centipede grass that has deep roots, along with some other weed type thing that has these tubers and despite years after year of pulling grass and weeds it always takes over! Thirdly, like I said it is heavy clay.
So the plan is and I have already started is to rip out everything planted in there. Spray a weed & grass killer. Till in lots of compost and plant some roses and perennials and bulbs.
How long after spraying it with the weed & grass killer do I have to wait till I can safely replant in that area? I don't have to worry about it getting my good grass because this area I'm talking about is cut off from the lawn by a walkway.