Soap Nuts are a natural washing detergent that is literally grown on trees. The Soapnut shells contain Saponins which on contact with water release mild suds and can be used as an environmentally friendly alternative to Laundry detergent in washing machines. In India and Nepal the soap nuts have been used as a washing detergent for hundreds of years. Modern day thinking that we should consider the future of the planet we live in have made Soap Nuts popular. Not only are they effective but the Soap Nuts are also relatively cheap compared to supermarket bought washing powder.