Hi sbmohan, there is some good info on the California Rare Fruit growers website about tropical guavas and reputable sources if I remember correctly. Guavas aren't all tropical, there are pineapple guavas, strawberry guavas and some others. I think tropical guavas are supposed to be bit harder to grow, but not impossible. I have a soft spot for tropical guavas as well and hope to grow some in pots in northest Arkansas (6b/7a), too :)! Best of luck!