I had the exact same experience as you describe in the above post with Sour orange seed. On July 14,2006 (I still remember the date) I received several Saint Dominic Sour Orange seeds from Sister Mary Catherine, a Dominican nun from the Monastery Of Our Lady Of The Rosary in Summit, NJ. These seeds originally came from the famous St. Dominic Sour Orange tree growing in Rome, Italy, which was planted from a seed by Saint Dominic in the year 1200. You can read about this tree, which is still alive today, in the book "The Citrus Industry" printed by the University of California Riverside (UCR) Volume One, of a 6 volume set. The actual tree that my seeds came from is growing in New Jersey (a rooted cutting of the Rome tree). When I opened the letter from Sister Mary Catherine, I found three very desiccated, shriveled,and dry looking seeds that seemed to have no embryo. Needless to say, I was discouraged that they would never germinate. Still they were the only seed I had to work with. I planted them and low and behold they came up. In 2015 the tree produced its first couple fruit, and in 2016 it set a good crop. Presently the tree is in full bloom. It took 9 years from seed to fruit. Today the tree is 7 feet tall and providing me with me plenty fruit.