SBK Brushwood Killer is a soluble concentrate designed to tackle tough weeds and hardwood saplings. For best results, apply from May to October when the soil is moist and weeds are actively growing. Avoid application in April, May, or June when sap is rising in tree stumps. Repeat treatments can be applied after six weeks, and allow six weeks between application and re-planting. Do not apply during drought or freezing conditions. Dilute as per product instructions and keep away from cultivated plants. This formula is designed not to harm grass but to target weeds at their roots to prevent re-growth.