Vitax weed free is a systemic total herbicide containing glyphosate for the control of annual and perennial weeds such as grasses nettles willowherb and dandelions around the garden and on hard surfaces the weedkiller is biodegradable and breaks down in the soil to allow re planting following application to weeds weed free moves through the plant and down to the roots for best effect apply as a spray from march to october when weeds are actively growing and have a large leaf area allowing plenty