how soon to plant after using roundup
- He told her to apply the. product to the unwanted plants according to the label directions, and she should start to see. results within a couple of days. The next day Julia sprayed the weeds with Roundup. After a few days Julia was thrilled to see. the weeds begin to wither and lose their green color. However, she began to wonder what this. meant for desirable plants nearby, and the vegetables she would soon plant in the soil.