Bananas have dark green fronds and fibrous stalks or trunks that can stain clothing if they rub hard against the clothing. Bananas contain chlorophyll and other naturally pigmented compounds that can easily stain. Stains from a banana tree are considered a grass stain. Once you have established what material has been stained and where the stain came from, you will be best equipped to remove the stain.
Determine what type of material is stained from the banana tree. Most materials are marked on a tag by the neck or waistline. Materials like silk need to be professionally cleaned. If a delicate material like silk has been stained by a banana tree, take that article to the dry cleaner as soon as possible for better results.
Natural fibers like wool or cotton can be treated at home with store bought cleaners.
Treat the stain with a stain pre-treatment gel or liquid. Gently rub in the stain pre-treatment and let sit overnight for better results. If you are concerned about the color fastness of your article of clothing, test a small patch of your colored clothing in a hidden area.
Rinse the pre-treatment stain out of the article of clothing; avoid rubbing in the stains too hard. The stain may be completely removed at this point and then you can wash this piece of clothing. If the stain remains, you must take other steps to remove the stain.
Use a detergent that has special enzymes that removes grass stains. Companies like Tide make a detergent that removes grass stains using specially formulated enzymes. You can let the detergent soak for fifteen minutes before putting the article in the washing machine. Repeat this washing method again if the stain still remains.
Soak your banana stained article of clothing in bleach if it is marked as bleach tolerant on the care label. Most bleach brands recommend one part bleach to three parts water for a bleach soak. Add this mixture to a bucket and soak the clothing overnight.
Wash the clothing in the washing machine and repeat if the stain remains in the clothing.