I cannot really speak to growing mangoes in pots, as I grow mine in the ground, but there are more cold-tolerant cultivars. Once our mango trees get established here in S. California, they actually can withstand some pretty cold temps (relatively speaking, here, meaning a few hours below 32 degrees). Our CRFG did a group buy with this grower a couple of years ago: Loading... I bought 3 varieties, Pineapple, Pina Colada and Gold Coast. All have done well in the ground.
Patty S.