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Yellow Woodsorrel
Life cycle: Perennial
Leaves: Consisting of three heart-shaped leaflets. Looks like a clover.
Stems: Branch at the bottom and are weak.
Flowers: Small yellow flowers, with five petals.
Roots: Horizontal-underground stem.
Comments: Can be difficult weed to control with herbicides, but often not a primary weed of concern. Has a tart taste. Sometimes called oxalis.
Control
Cultural: Bedding or mulch in garden or landscapes.
Foliar Herbicides: In lawns, products that contain 2,4-D and dicamba (Weed-B-Gone Max, Trimec, WeedStop, and others), or fluroxypyr (Spotlight). Best option may be triclopyr (Turflon), which may also be found in a Weed-B-Gone product developed for control of chickweed, clover, and oxalis species.
Soil Herbicides: For landscapes, may use isoxaben (Gallery or Portrait). In lawns, soil herbicides for crabgrass, such as dithiopyr (Dimension) or pendimethalin (Pendulum and many others) will also suppress woodsorrel.