Green Light Amaze Grass & Weed Preventer (1% and 1%) (4 & 10#)Īnderson Turf Products Crabgrass Preventer with 2% Team Herbicide (50#) (partial Pre-emergent Herbicides for Oxalis Control in Home 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. Avoid pesticide drift by spraying on non-windy days. For safe use on lawns, spray herbicides when temperatures are below 90 ☏. When using a post-emergent herbicide, spray to just wet the foliage of the weeds. The majority of the woodsorrel seeds germinate in the late winter/early spring, but some seeds may germinate at any time of the year. Pre-emergent herbicides need to be applied at the proper time of the year, may require one or more subsequent applications, and the herbicide granules need to be watered in appropriately. Always read the product label for mixing rate for weed control on each turfgrass species and for safe use of the product. Pre-emergent and post-emergent herbicides for oxalis (yellow woodsorrel) control in South Carolina lawns are listed in Tables 2 and 3. Post-emergent herbicides are often more effective at killing smaller weeds rather than older, mature ones. Pre-emergent herbicides prevent seed growth, whereas post-emergent herbicides are applied to the foliage of the weeds once they emerge. For larger oxalis infestations in the lawn, pre-emergent and post-emergent herbicides may be necessary.
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Total Kill Pro Weed & Grass Killer Herbicideįor small numbers of oxalis plants scattered throughout the lawn, spot treatment with a recommended post-emergent herbicide may provide adequate control. Southern States Grass & Weed Killer Concentrate II
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Monterey Remuda Full Strength 41% Glyphosate Gordon’s Groundwork Concentrate 50% Super Weed & Grass KillerĮliminator Weed & Grass Killer Super Concentrate Maxide Super Concentrate 41% Weed & Grass Killer Martin’s Eraser Systemic Weed & Grass Killerīonide Kleenup Weed & Grass Killer 41% Super Concentrate Examples of Products Containing Glyphosate in Homeowner Sizes. Always read product labels for safe use around landscape ornamentals and established perennials. Examples of products containing glyphosate are listed in Table 1. Target oxalis seedlings and young plants (before the flowering stage) for best results.
Apply glyphosate spray to thoroughly wet the foliage of the weeds. In landscape beds, a non-selective herbicide containing glyphosate is the best choice for spot treatment of oxalis. For more information on soil testing, see HGIC 1652, Soil Testing. Lawn maintenance should adhere to fertilizer and lime recommendations obtained from soil test results combined with proper mowing height and frequency requirements. Maintenance of healthy, dense lawns will create less space for oxalis to invade. The seeds require light for germination, so limiting light to the seedbed with mulch will reduce the numbers of new oxalis plants. Oxalis species form fruiting capsules that contains multiple seeds.Ī light layer of mulch in landscape beds and around flowers and shrubs will aid in preventing further germination of oxalis seeds. Do not place the weeds with seeds in compost bins for reuse in the landscape. Rhizomes can be easily removed when the soil is moist. Removal of all vegetative portions of the plant, including roots and rhizomes, is important. Small plants can easily be handpicked or dug as they appear before they flower or form seeds. Oxalis flowers and produces seeds heavily in the spring and summer but can produce both all year long. All plant parts are poisonous because of the production of soluble oxalate but are only mildly toxic and generally cause a little problem if ingested. Oxalis grows under a variety of conditions but prefers moist, fertile soils and full sun. Oxalis reproduces primarily by seed but may spread by slender underground rhizomes. When mature, seeds are ejected from the capsule for a considerable distance from the parent plant. Small okra-shaped fruiting capsules are formed that contain minute seeds. Oxalis produces 5-petalled, yellow flowers singly or in clusters on a branched stalk. LayLa Burgess, © 2017 HGIC, Clemson Extension Oxalis produces a 5-petalled, yellow flower followed by a seed capsule. Creeping woodsorrel ( Oxalis corniculata) often invades container flowerpots but can be easily removed by hand pulling.
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