It’s really crucial to thoroughly spray whatever it is you want to delete from your area. Then if it does re-emerge, it’s critical to repeat the application again thoroughly covering & saturating this plant that you want to rid. That should take care of it completely.
Hi - Great question, safe to plant when dry.
I contacted the seller and asked this exact question before I bought it and his response was that it lasts forever. He said the bottle it comes in might start to break down if it’s left in the sun for a long time, but the product never spoils.
I’m not sure what a DG path is, but it’s a strong vinegar solution that’s environmentally healthy