Always useful to know how to remove a grass stain when you got young children or an athletic husband. Green spots are not always that classy. Depending on the fabric here lies our advice to try and get rid of it.
Soak the stained area with white vinegar. Leave it to act. Rinse.
If the grass stain persists, dab it with a cloth dampened with methylated spirits slightly diluted. Rinse. Then wash with soap and rinse again.
On white cotton fabric: Rub the stain with a cloth moistened with lemon juice and then rinse.
On fragile cloth: use methylated spirits or ammonia water.