According to this article, (Plants From Trash - Cornell Composting,) the little black seeds should be removed from the fruit, nicked with a knife or nail file, and soaked for a few hours until they swell, then planted in a pot, placed in a sunny window, and never allowed to dry out. read more
Let the seeds, with removed seed coats, sit in a final soak of room temperature water. The soak should only last a few hours, growth hormones, Superthrive, or other seed treatments can be added for this final soak. Prepare your Planting media For Tamarind seeds we used a pure coco fiber mix. Simply add warm water, mix until the coco fiber is saturated. read more