Broadleaf weeds are unwanted plants that can grow in lawns, gardens, or yards. They are easy to spot when growing among grasses and can be very hard to eradicate. Broadleaf weeds can emerge annually, biennially, or perennially, making consistent management difficult. Perennial weeds are often very difficult to control as they regenerate faster than they can be eradicated. Broadleaf weeds often have wide leaves and grow from a stem. Most broadleaf weeds develop clusters of blossoms or single flowers as they mature that can be considered undesirable. The roots of most broadleaf weeds are fibrous in nature. The roots can be thin, a large taproot, or a combination. Many broadleaf weeds spread through their seeds and rhizomes, although some only spread through seeds. Some popular broadleaf weeds include chickweed, clover, dandelion, wild geranium, ivy, milkweed, plantain (broadleaf), and thistle.

Broadleaf weeds can be distinguished from grassy weeds by their structure and growth habits. Most broadleaf weeds have leaves with net-like veins and nodes that contain one or more leaves, and they may have showy flowers, while grassy weeds appear as a single leaf from a germinated seed. Furthermore, grassy weeds are different because they may initially appear like desirable grasses.

There are different methods to control broadleaf weeds, including cultural, mechanical, and chemical methods. Cultural methods include maintaining a healthy lawn, proper mowing, and watering practices. Mechanical methods include hand-pulling or using a hoe to remove weeds. Chemical methods include using herbicides that target broadleaf weeds. Three-way herbicides are the most commonly used broadleaf weed killers on bermudagrass, zoysiagrass, centipedegrass, St. Augustinegrass, and tall fescue to control common vetch and almost any broadleaf weed in the lawn.