What kills dandelions permanently?

To control dandelions long term, you need to attack both the visible plant and its deep taproot. Selective broadleaf herbicides are designed to be absorbed through the leaves and carried down into the root, which helps prevent quick regrowth. Spot treating dandelions when they are young and actively growing, especially in fall or early spring, gives the best results. Avoid letting them flower and seed, as each plant can produce many seeds that blow across the yard. Over time, regular weed control, proper mowing, and consistent fertilization will help your grass thicken and make it harder for new dandelions to establish in Oklahoma lawns.