Don't Avoid using degreaser, alkaline or ammonia detergents. They may permanently set stain.
How to Remove Grass Stains From Jeans and Other Clothes
Does grass come out of jeans? Follow these grass stain removal tips to learn how to get grass stains out of clothes including denim pants and other fabrics.
Pre-soak for at least 30 minutes in warm water with a powder detergent containing enzymes.
Before washing, pre-treat with Clorox® Stain Remover & Color Booster for colors.
Launder as usual with your favorite detergent on the hottest recommended water setting.
Final “field” note: Repeat as necessary before machine drying.
Wipe area with a solution of ½ cup of Clorox® Disinfecting Bleach per gallon of water. Wait 5 minutes.
Rinse well and air-dry.