Spot-treat wood sorrel plants in ornamental beds by spraying them with an herbicide containing the active ingredient glyphosate. Cover the ground with a 2- to 3-inch layer of mulch in infested areas to prevent the seeds from germinating. Each seed pod has the potential to hold as many as 5,000 seeds, but usually contains 10 to 50 seeds. Treat wood sorrel in warm-season turfgrass such as Bermuda grass, Buffalo grass, St. Augustine grass, and zoysiagrass with a postemergent herbicide containing the active ingredient fluroxypyr. Learn to get rid of Oxalis weeds with some easy steps and save yourself time and energy as well as sanity. All recommendations for pesticide use are for South Carolina only and were legal at the time of publication, but the status of registration and use patterns are subject to change by action of state and federal regulatory agencies. Read the entire label and follow the instructions to the letter. Join our mailing list to receive the latest updates from HGIC. Follow all directions, precautions and restrictions that are listed. Oxalis leaves are distinctly trifoliate (leaflets of three) with a heart shape similar to the leaves of clover. Oxalis responds well to repeat spraying with post-emergent broad-spectrum herbicides. Watch for shamrock-like foliage that folds down the middle on especially hot days and at night. Pull up young wood sorrel plants before they have a chance to bloom. It will tolerate shady areas. Wood sorrel is a troublesome weed that is difficult to control, especially in mild climates were it blooms year-round. Lawn maintenance should adhere to fertilizer and lime recommendations obtained from soil test results combined with proper mowing height and frequency requirements. How to control oxalis also known as wood sorrel in your lawn 9 ways to win the war on oxalis stuff co nz ortho weed b gon 32 oz clover and oxalis for garden news oxalis is a pesky weed that takes verance to. Mention Creeping Charlie to anyone who works tirelessly for a well-manicured lawn, and you will likely receive an agonizing groan as a reply. Treat wood sorrel growing in cool-season turfgrass such as Kentucky bluegrass, ryegrass, tall fescue and bent­grass with a postemergent herbicide containing the active ingredient triclopyr. Erect stems give rise to an alternate leaf arrangement. The weed will reemerge if you leave bits of root in the soil. Weed control of oxalis is a common problem. The seeds travel greater distances by adhering to clothing, garden tools, pets and wildlife. The seeds require light for germination, so limiting light to the seedbed with mulch will reduce the numbers of new oxalis plants. Removal of all vegetative portions of the plant, including roots and rhizomes, is important. Fertilising or irrigating is also not effective: ‘the more vigorous the turfgrass, the more vigorous the creeping woodsorrel’ (UC-IPM Online, 2013). Oxalis is a perennial weedy groundcover, which spreads through interlocking rhizomes that are easy to break apart. If I manage to get a 2- to 3-inch layer of mulch down immediately after weeding, I can at least slow the return process considerably. When mature, seeds are ejected from the capsule for a considerable distance from the parent plant. Jackie Carroll has been a freelance writer since 1995. For more information on soil testing, see HGIC 1652, Soil Testing. Herbicides come in varying strengths and forms and may contain additional ingredients, so it is essential to carefully follow the label instructions regarding mixing, timing and method of application. Oxalis reproduces primarily by seed but may spread by underground slender rhizomes. The two primary methods for managing creeping woodsorrel are removing established plants and controlling germinating seeds. Small okra shaped fruiting capsules are formed that contain minute seeds. As with triclopyr, follow the label instructions precisely. Avoid pesticide drift by spraying on non-windy days. Oxalis (O. stricta) can be pulled up by hand easily when found growing intermittently in landscape beds.LayLa Burgess, © 2017 HGIC, Clemson Extension. Rhizomes can be easily removed when soil is moist. The mulch blocks out light, which is necessary for wood sorrel seeds to germinate. If you don't have many plants, pick the weeds by hand or use a spade to dig … Her home-and-garden and nature articles have appeared in "Birds & Blooms" and "Alamance Today." She holds a Bachelor of Science in medical technology from the University of North Carolina. Pre-emergent and post-emergent herbicides for oxalis (yellow woodsorrel) control in South Carolina lawns are listed in Tables 2 and 3. Pre-emergent Herbicides for Oxalis Control in Home Lawns. When using a post-emergent herbicide, spray to just wet the foliage of the weeds. Copyright © 2020 Clemson UniversityClemson Cooperative Extension | 103 Barre Hall Clemson, SC 29634864-986-4310 | Contact UsHGIC@clemson.edu, College of Agriculture, Forestry and Life Sciences, Centipedegrass Yearly Maintenance Program, Martin’s Eraser Systemic Weed & Grass Killer, Bonide Kleenup Weed & Grass Killer 41% Super Concentrate, Maxide Super Concentrate 41% Weed & Grass Killer, Super Concentrate Killzall Weed & Grass Killer, Gordon’s Groundwork Concentrate 50% Super Weed & Grass Killer, Eliminator Weed & Grass Killer Super Concentrate, Monterey Remuda Full Strength 41% Glyphosate, Southern States Grass & Weed Killer Concentrate II, Total Kill Pro Weed & Grass Killer Herbicide, Anderson Turf Products Crabgrass Preventer with 2% Team Herbicide (partial control), Scotts Halts Crabgrass  & Grassy Weed Preventer, Bonide Crabgrass & Weed Preventer for Lawns & Ornamental Beds, Ferti-lome Broadleaf Weed Control with Gallery, Helena Pro-Mate Barricade & Fertilizer 0-0-7. Oxalis forms a fruiting capsule that contains multiple seeds.LayLa Burgess, © 2017 HGIC, Clemson Extension. Store unused product in its original container and out of the reach of children. Table 1. The leaf juice eases wasp and other alkaline stings, and has an antibacterial action. Oxalis weed control and weed killer for creeping oxalis in lawns and other oxalis weeds. Likewise, there are numerous types of post-emergent weed controls that claim on their label to control Oxalis. To kill oxalis in the lawn, use Ortho® Weed B Gon® Chickweed, Clover & Oxalis Killer For Lawns Ready-To-Spray . Table 3. Target oxalis seedlings and young plants (before the flowering stage) for best results. Cover the ground with a 2- to 3-inch layer of mulch in infested areas to prevent the seeds from germinating. These herbicides work best … Mow high. Notes: These pre-emergent herbicides should only be applied to well-established turfgrass lawns. Irrigate the lawn the day before application to reduce drought stress to lawns and to promote active growth of the weed for better herbicide uptake. Post-emergent herbicides are often more effective at killing smaller weeds rather than older, mature ones. In this article I’ll explain how this troublesome weed grows and spreads, and explain how to kill Creeping … Oxalis (O. corniculata) often invades container flowerpots but can be easily removed by hand pulling. Use a hoe to dig up plants in severely infested sites. atropurpurea syn. Pre-emergent herbicides prevent seed growth, whereas post-emergent herbicides are applied to foliage of the weeds once they emerge. Examples of products containing glyphosate are listed in Table 1. Each rhizome will eventually produce tiny bulbils. Apply vinegar in the morning on a day with little-to-no wind, so you don't contaminate other plants. Examples of Products Containing Glyphosate in Homeowner Sizes. Table 2. Add dish detergent to the herbicide for more stickiness and thorough application to the small plants. Be sure to read and follow all label directions. Although it is invasive, it is quite easy to kill. All plant parts are poisonous because of the production of soluble oxalate, but are only mildly toxic and generally causes little problem if ingested. Most oxalis species are regarded as weeds. All recommendations are for South Carolina conditions and may not apply to other areas. Use pesticides only according to the directions on the label. A few tablespoons of detergent for a gallon of herbicide mixture is enough. Post-emergent Herbicides for Oxalis Control in Home Lawns. There are herbicides that target pesky oxalis. It is difficult to remove by cultivation as any remaining rooted stems will regrow. A light layer of mulch in landscape beds and around flowers and shrubs will aid in preventing further germination of oxalis seeds. 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