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 Alternate Picture(s) |
 (see also Creeping Woodsorrel) |
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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. |
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The Yellow Woodsorrel flower is yellow with five petals and occurs in clusters. The seed pods range from 1/2 - 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. |
| Integrated Pest Management Control Recommendations: |
Cultural Practices:
Since seeds may be projected several feet when seed pods mature, it is important
to keep oxalis out of adjacent ornamental and flower beds as well as removing
from turf areas. Dense, vigorous cool-season turf areas will resist infestation.
Physical removal of single plants can be easily accomplished. Follow good
turf management practices including disease and insect control and proper
fertilization.
Herbicide Use:
Properly timed preemergent herbicide applications can prevent oxalis germination.
Spot treatments with a postemergent 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.
University Links | Gordon's Recommendations | Germination Dates
