Sapindus detergens, Ritha is a beautiful, tropical, large-leaved deciduous tree of the Asian continent. It can be grown in warm to tropical climates, small trees can be grown inside in large tubs. Better known as soap-nut tree in inter-continental trade, it is an important trees of tropical and sub-tropical regions of the Indian subcontinent. Ritha flowers during May - June. The flowers are small and greenish white. The dried ritha fruit is most valuable part of the plant. Its fleshy portion contains saponin, which is a good substitute for washing soap and is as such used in preparation of quality shampoos, detergents, etc. Ritha seed germinates easily. To ensure cent per cent germination, the seed is soaked in lukewarm water for 24 hours and then sown.