A dandelion's deep taproot is what makes it so persistent — leaving even a small piece behind lets it grow right back.
Pulling Them by Hand
A dandelion digger or similar narrow tool lets you pry up the whole taproot, which can run 6 to 18 inches deep. Watering the area the day before makes the soil looser and the whole root easier to remove in one piece.
Stop Them Before They Spread
A single dandelion flower can release hundreds of wind-carried seeds once it goes to seed, so removing plants while still flowering — before the fluffy white seed head forms — meaningfully slows their spread through a lawn or garden.
A Thick Lawn Is a Deterrent
Dandelions take hold most easily in thin, patchy turf where there's bare soil for seeds to land on. Regular mowing at a taller height, overseeding bare patches, and proper watering all encourage a denser lawn that leaves less room for dandelions to establish.