The ideal time for treating perennial weeds like dandelions & docks is June to August., Kills most weeds with a single application. Some tough weeds may need a repeat treatment if regrowth appears., Avoid contact by spray with cultivated plants & other desired vegetation., Shake well before use. Rotate nozzle to Spray or Jet. Spray weed leaves lightly until visibly moistened but avoid wetting to run-off., Treatment effect on some weeds will be seen within a few days. It may take up to 4 weeks for effects to be seen on other tougher weeds.