They live for more than two years and may possibly last indefinitely. Perennials are classified according to their method of reproduction. There are two types, the simple and the creeping perennials. Simple perennials reproduce by seed only and examples are dandelion, dock, broadleaf plantain and Florida betony . Creeping perennials reproduce by both seed and vegetative parts and are the most troublesome to control.
Herbicides can be useful if applied properly and incorporated into the overall weed control program.
Ask your local county agent about the proper chemicals to use on specific weeds. Calibration of equipment is an important part of any herbicide application. This is simply making the necessary adjustments to the sprayer so that the proper amount of chemical will be applied to a specific area. Regardless of the herbicide used, care should be exercised and the chemical must be applied in accordance with instructions on the manufacturer's label. Also be sure that the herbicide you buy states on the label that it can be used on your particular lawngrass.