Q.Herbicide for Gladiolus
I have been using pre-emergence weedicide (active ingredient S-metolachlor) with successful control for 60 days. Can I repeat it after 60 days before weeds start to re-grow? Which post-emergence herbicide/weedicide can I use along with Gladiolus plants to control weeds when both Glad plants & weeds have sprouted?

Here is an article that will give you an overview of herbicide use, as will as alternative methods to weed control among your glads: http://extension.umass.edu/floriculture/fact-sheets/weed-management-outdoor-cut-flowers