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Problem:
Oxalis (Lawns)

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Problem Info

A weed with pale green leaves divided into three heart-shape leaflets invades thin areas of the lawn. The leaves are 1/4 to 3/4 inch wide and are similar to clover. Small, bright-yellow flowers are 1/2 inch long with five petals. Cucumber-shaped, light-green seedpods develop from the fading flowers. Plants may be 4 to 12 inches high. Oxalis, also called yellow woodsorrel or creeping woodsorrel, thrives in dry, open places but may also be a problem in moist, well-fertilized lawns. It often invades lawns that are beginning to thin from insect, disease, or maintenance problems.

Analysis

Oxalis stricta and O. corniculata Oxalis, also called yellow woodsorrel or creeping woodsorrel, is a perennial plant that thrives in dry, open places but may also be a problem in moist, well-fertilized lawns. It often invades lawns that are beginning to thin from insect, disease, or maintenance problems. Oxalis reproduces from the seeds formed in the seedpods. When the pods dry, a light touch causes them to explode, shooting their seeds several feet in all directions. Oxalis leaves contain oxalic acid, which makes them sour.

Solution Advice

Check the soil pH level and follow recommended lawn care practices for a healthy, vigorous lawn. A healthy lawn helps smother the oxalis.

Product Recommendations

Ortho® Weed B Gon® Chickweed, Clover & Oxalis Killer for Lawns Concentrate

Ortho® Weed B Gon® Chickweed, Clover & Oxalis Killer for Lawns Concentrate is formulated to kill tough weeds without harming your lawn.

  • Read more about Ortho® Weed B Gon® Chickweed, Clover & Oxalis Killer for Lawns Concentrate
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