Utah is in the western region of the United States and much of the state has a soil called Mivida. This soil is considered quite sandy and has a mixture of silt and clay. While this type of soil may make it harder to maintain a lush green lawn in Utah, it still provides suitable conditions for common lawn weeds to flourish.
Dollarweed or pennywort (Hydrocotyle) is a low-growing summer perennial that has 1-to-2-inch round leaves that are thought to resemble silver dollars. It produces small five-petal white flowers that grow in clusters and bloom from April to September. The dollarweed is a water-loving plant and thrives when yards contain excessive moisture. It can sometimes be controlled by simply providing better drainage to a yard that will allow it to dry out. A post-emergent herbicide specific for this type of species of dollarweed may also be applied.
Field bindweed or creeping Jenny (Convolvulus arvenis) is a summer perennial and has long vine-like creeping stems that can spread from 1 1/2 feet to over 6 feet in length. A member of the morning glory family, it has 1-to-2-inch long arrowhead-shaped leaves and produces 1-inch trumpet-shaped flowers from April through October that bloom in white or pink. Field bindweed is often difficult to get rid of because it has an extensive root system that can be over 15 feet long underground. It is best treated by applying a post-emergent herbicide once it has started growing and before the flowers bloom.
Red sorrel or sheep sorrel (Rumex acetosella) is a clumping summer perennial that has arrowhead-shaped leaves, which either stay in the center of the plant or grow off of reddish stems. It blooms with flowers from May to September; the female plants grows a reddish-brown flower and the male plants have yellow-green blooms. Red sorrel is an acid-loving plant that likes soil with poor drainage. If treatment is required, a post-emergent herbicide applied while it is actively growing is considered best, since removal of the plant by hand leaves part of the root system intact and additional plants will grow.