Broadleaf grass isn't grass at all, but is instead a type of weed that invades lawns. These weeds spread aggressively and require frequent maintenance to control them.
Broadleaf weeds can be reduced through the use of pre-emergent and post-emergent herbicide, but eradicating them completely is unlikely. Broadleaf weed seeds occur naturally in soil. They are also introduced to lawns through bags of poor-quality grass seed mixes.
Some examples of broadleaf weeds include dandelion, chickweed and wild onion. Spotting these weeds in a lawn is easy since their broad leaves look very different from fine bladed grass. Maintaining a healthy lawn through irrigation, fertilizer, good mowing practices and herbicides will keep these weeds under control.