If you are not dealing with an extensive thistle problem, the best way to control this weed is to physically remove the plants by digging them up with a small shovel or trowel. It is important to remove as much of the canopy and taproot as possible. Maintaining a healthy, dense lawn will help to prevent the weeds from coming back. In hardiness zones 6 & 7, if chemical control is necessary, use a broadleaf-specific herbicide applied from September to early November or March to May. Contact your local Extension office for herbicide recommendations.
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