Oxalis
Scientific Name: Oxalis stricta
Also Known As: Yellow Woodsorrel
Weed Family: Oxalidaceae
Description
Yellow woodsorrel, also known as oxalis, is a summer annual, that can be perennial in some areas. Yellow woodsorrel grows on weak stems that branch at the base and may root at the nodes. The leaves form in groups of three leaflets on long petioles, and are alternate on the stems. Although sometimes mistaken for clover when not in flower, the leaves differ from clover in that they are distinctly heart shaped. The yellow woodsorrel flower is yellow with five petals and occurs in clusters. The seed pods range from ½- to 1-inch in length, have 5 ridges and are pointed. Yellow woodsorrel spreads by seeds which burst from the pods at maturity and may be scatted several feet. Yellow woodsorrel is found throughout the United States.
Herbicide Use
Properly timed pre-emergence herbicide applications can prevent oxalis germination. Spot treatments with a post-emergent broadleaf herbicide will clear out oxalis infestations. For optimum control, make your herbicide application when oxalis is actively growing and in the second trifoliate leaf to flower stage of growth.
Distribution
Germination Dates
Zone-3: June
Zone-4: June
Zone-5: May
Zone-6: April-May
Zone-7: March
Zone-8: March
Zone-9: February
PBI-Gordon Product Recommendations
