Yellow woodsorrel is an herbaceous perennial common in greenhouse and turf situations. It is most recognizable due to the heart-shaped leaflets that are found three to a leaf. The plant has a shallow taproot, and hairy stems that are 4 to 10 inches tall. Flowers are bright yellow, have five petals, and bloom in early spring (March to April). The fruit is a narrow capsule ½ to 1 inch long. The supporting stalk bends just below the capsule.
Perennial broadleaf turf weeds are capable of living more than two years. They thrive in weak, thin turf; golf fairways and roughs; home lawns; playfields; and industrial grounds. Proper turf maintenance is the key to control of this weed. First, select adapted turfgrass cultivars for your area and then properly fertilize, mow, and water to encourage dense growth.
Growth Season/Life Cycle
upright, but very low-growing plant
heart/kidney/spade; partly folded
1/2 - 1 inch
fibrous; note the extensive rhizomes associated with this plant