Harvey, did you happen to hear Richard Campbell from Fairchild talk at last year's Festival of Fruit? He is undoubtably the world's expert on Mango cultivars. He spoke of a few varieties with lower degree-day requirements that I'd like to taste and perhaps try here. I believe his presentation is online somewhere -- sorry I can't be more helpful with that.
Another giant in mango cultivars is Jim Neitzel of San Diego. He's not much for email or phone conversations but you can pick his brain remotely by contacting his colleagues like Paul Fisher. Jim also has a power-point presentation on Mangos which I'll try to track down when I see him next week.
Finally, I believe that Tom Del Hotal of Southwestern College and Pacific Tree Farms fame has been assimilating mango cultivar information from both of these sources and others. He is overloaded with tasks at the moment but if you come to San Diego you could pick his brain while buying a plant or two from his home nursery. He has some fine seedlings of Grumichama, along with air-layerings of desirable pineapple guavas, etc.
