Another species of the soap-nut tree is found in Himalayan regions grown by Nature by itself (Sapindus mukorossi). It bears larger fruits. Seeds of soap-nut trees are said to germinate easily. But now propagation of this tree by man is drastically low; the tree needs to be grown in all farms as its canopy gives cool shadow, and its fruits have also contraceptive and antimigraine chemicals in addition to its cleansing saponin content.
This Soap-nut tree that gives us many such natural products is really a wonder tree among all the other trees, as it was in the past!