how do you kill dandelions
One way to kill dandelions is to use a systemic selective herbicide for dandelions in your yard or a nonselective herbicide for dandelions in your patio or sidewalk. Spray on a windless day when the temperatures are between 60 and 85 degrees Fahrenheit (15.5 to 29 degrees Celsius) [source: The Lawn Advisor ]. Don't use it in your garden because it will kill any plants in its path. 2  Put a teaspoon of salt at the dandelion's base when the weather and soil are dry. 3  The salt will eventually kill the dandelion's roots. 4  Apply more salt if necessary (e.g. if the salt blows away or if it rains before the salt kills the dandelion).