Most broadleaf weeds have netlike veins in their leaves and nodes containing one or more leaves.
They may have showy flowers. Broadleaf weed seedlings emerge with two leaves. Because of differences in their leaf structure and growth habits, they are easy to distinguish from grasses. A weed's life cycle has great impact on the selection and success of a given control procedure, so it is important to learn the life cycle characteristics of a weed when you first learn its identity. Annual weeds germinate from seeds, grow, flower, produce seeds and die in 12 months or less.