Shake bottle well before use.Do not spray if rain is likely within 2 hours. Do not water for at least 24 hours after application. For best results, apply on a warm, sunny day to young plants with dry foliage. Do not remove treated weeds until completely died off. Do not apply in windy conditions. Results may take longer on certain tough, mature weeds or weeds in deep shade. Repeat applications may be necessary on mature weeds.