Hass Avocado is named after Rudolph Hass, a California postman who patented the Hass Avocado in 1935. The Hass avocado is a large-sized fruit, weighing 200 to 300 grams. When ripe, the skin becomes a dark purplish-black and yields to gentle pressure. When ready to serve, it becomes white-green in the middle part of the inner fruit. Owing to its taste, size, shelf-life, high growing yield and in some areas, year-round harvesting, the Hass cultivar is the most commercially popular avocado worldwide. In the United States it accounts for more than 80% of the avocado crop, 95% of the California crop and is the most widely grown avocado in New Zealand. For those few gardeners that believe that only grafted avocado trees produce fruits, that is totally absurd. Our avocado trees in our property is producing avocados, the pictures were taken from the tree. It started from a seed. And the EXPENSIVE nurery avocado trees we bought over and over again, they all died in N. CA. We have friends that have tons of avocados on their tree that started from seed. He said, it takes 15-20 years for the tree to produce avacado, he is right. Ours are producing right now, and it is just about 15-20 years. So plant the tree, your next generation people will appreciate you.