You can plant in the area treated with Killzall Weed and Grass Killer 2 weeks after application.
Killzall will not harm dogs when used as directed on the product label. Keep pets and children away from the area while you are doing the treatment and they can return after the application has had a chance to dry.
I would recommend using this product with a surfactant such as Surfactant for Herbicides due to the waxy coating of the leaves. It is hard to penetrate the wax covering which is why I recommend the surfactant.