How long does it take for a non-selective herbicide to work?
This will depend greatly on the weather conditions. When the weather is very hot, the plants will be respiring at high levels, the more they respire, the faster the herbicide will be absorbed, resulting in a faster kill. If the weather is more overcast, the plant will take longer to absorb the herbicide. On average, it will take anywhere from 7 to 14 days to get complete kill. You may also need to reapply in some areas that may have been accidentally skipped.
