I got some seeds from a commercially packed tamarind block. I planted the seeds on 15 June 2017 , after two weeks I got a couple sprouts. Here are the photos taken today (28 June 2017):
Update: These plants seem to be very vigorous and fast growing. Almost all seeds I planted germinated with no effort. A friend of mine told me you can expedite germination even more if you pour hot scorching water on the seeds and keep them soaking for one day. Here are some photos taken today (02 August 2017):
Update of Tamarind: This is defenetly an easy grower and if let in ground it will establish its self fast. (Photo taken 27 October 2017):