St. Augustine supergrass develop as a warm season perennial sens in the southern United States and along the Gulf Coast and in Southern California . This broadleaf , course - textured grass tolerates fond shade and a panoptic range of stain condition . A sizeable rack of St. Augustine usually chokes out most weeds that attempt to invade during its growing season . However in the recent fall and winter , when St. Augustine is dormant , grassy and broadleaf weeds discover prolific land .

Henbit

Henbit is a wintertime annual broadleaf weed . It is a member of the mint family reproducing by seeds and root stems . The flora ’s leaves have rounded - tooth sharpness and are in the main ellipse forge . The folio are opposite from one another along the stem and gloomy green in color . The lower leaves have petioles ( slender stems that attach to the principal stem turn ) and the upper leave are sessile ( attached like a shot on the stem ) . The veins are palmate with brass that vary in the soma of a deal . Lamium amplexicaule grows to a top of 16 to 18 in .

Henbit flowers may be pinkish , red or purple . They are tube-shaped with whorls in the upper folio arrangement . Henbit efflorescence in spring in the northerly United States and in tardy wintertime in the South . Control Lamium amplexicaule with pre - emergent herbicide such as isoxaben and postemergence herbicides that contain hormone - type herbicides in other spring . Be certain to read the package educational activity on postemergent herbicide products to verify they are approved for purpose on St. Augustine sens .

Chickweed

clammy chickweed grows throughout North America as a winter annual . It run prostrate along the ground , with the upper portion erect and branch . bow are light dark-green in color and with fuzz in upright rows . The leaf are arranged oppositely on the shank and have an ellipse or ovate shape . leave are colored lighter green with leafstalk on the lower foliage . Upper leaves are sessile .

Chickweed has white lead - like flowers with five profoundly notch petals . mouse-ear chickweed plant may flower all during the year , but are more likely to blossom in March through November . Control for mouse eared chickweed in St. Augustine is the same as for henbit .

Oxalis

Under some circumstance , oxalis — also hollo yellow woodsorrel , common jaundiced oxalis , sheep sorrel , sourgrass , toad rozelle or yellow woodsorrel depending on develop location — might be consider an attractive plant with its sensationalistic flowers and marrow - shaped , morose green leaves . However , homeowner with St. Augustine grass have come to dislike it because oxalis is difficult to remove once it have a foothold in your lawn due to the plant ’s all-encompassing rhizome system .

Oxalis is an herbaceous perennial with three heart - shaped leaflets per leaf format alternately on the 4 to 10 inch marvellous , hairy stems . The five - petal flush bloom brightly yellow in early outpouring . Oxalis plant have a shallow taproot that can be hand - draw . However , the rhizomes spread widely so that hand - pulling is ineffective to remove the plant life from St. Augustine grass . Most weed killers that work on oxalis are not recommended for St. Augustine lawns . It is potential to use a glyphosate as a spot treatment with the discernment that it kills everything , and then wait for the grass to re - comprehend the area .

References

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