Although some parts of North Texas have a heavy alkaline type of clay soil that can make it a challenge to keep a nice looking lawn, many of the weeds in North Texas don't seem to mind the soil conditions at all. Fortunately, there are ways to get rid of lawn weeds in your yard and once you identify them, you will know what to do.
Dog Fennel (Eupoatorium capillofolium) is a short-living summer perennial. It has feather-like leaves and is quite similar in appearance to dill (Anethum graveolens), although it is more easily recognized by its foul smelling scent. Dog fennel produces small white flowers from August to September and is a favorite for bees. It does not do well when lawns are established and because it grows upright, it cannot tolerate low mowing. It is best treated with a post-emergent herbicide applied after it appears and before the flower stage.
Pineapple weed (Matricaria discoidea) is a summer annual that grows 3 to 12 inches in height and has light green fern-like leaves that are 2 inches long and ¾ of an inch wide. It produces yellow colored flowers from May to August and although the flower heads do somewhat resemble tiny pineapples, the plant actually gets its name from the pineapple like scent the plant releases when it is crushed. Since it is a summer annual, the pineapple weed may be treated with a pre-emergent herbicide to prevent germination or apply a post-emergent if it has already appeared.
Wild violet (Viola pratincola) is a winter perennial that grows 2 to 5 inches in height. Although it somewhat resembles the domesticated violet with its heart-shaped leaves, the wild violet is more spreading and its stems and leaves have a slightly relaxed look to them. It produces small white, blue or purple flowers from March to June and is sometimes used as an ornamental ground cover; however, care should be taken when it is planted because of its highly invasive nature. When physically removing the wild violet, its root must be removed or the plant will return. If applying herbicide, a series of post-emergent treatments is usually required and should be applied as soon as the plant reaches a two-leaf stage.