Fold up the pollen stained garment to keep the pollen from falling off the fabric onto other surfaces. Carry the garment outdoors and give it a vigorous shake to remove as much loose pollen as possible.
Place the garment on a flat surface with the pollen stain facing up. Lightly apply sticky tape over the remaining stain to lift pollen out of the fabric fibers. Lift and discard the tape.
Spray aerosol prewash stain remover on the rest of the pollen stain. Allow the prewash to soak into the stain for five to 10 minutes.
Wash the garment with laundry detergent and all-fabric bleach to remove the last traces of pollen stain. Before drying the cloth, make sure the pollen stain has been removed entirely.