To remove grass stains from clothing, apply a liquid prewash stain remover or detergent, and let it sit for several minutes. Scrub the grass stains briefly with a toothbrush to work the liquid in, then place the item in the washer, using the hottest water setting the fabric can handle.Continue Reading
Pour a prewash liquid stain remover directly on the grass stain. You can use a store-bought liquid stain remover treatment, or a high-quality liquid laundry detergent that contains enzymes. You can also make your own pre-treatment, including mixing one part vinegar with two parts water, or pouring a few drops of molasses on the stain.
Lightly scrub the grass stain with a toothbrush, rag or nailbrush to work the liquid into the stain a bit. Let the treatment sit on the stain for 10 to 15 minutes.
Place the pretreated clothing in the laundry with a high-quality laundry detergent that contains enzymes. Add chlorine bleach if the fabric is white and safe for bleach. Set the machine for the hottest setting that the fabric can handle. If the stains are still there, repeat the pretreatment and wash until the grass stains are gone.