Under the existing warm-winter climate that we’ve been experiencing for a decade +, it is very difficult for mangos from Northern India and Pakistan to fruit in south Florida. We’ve been able to get some fruit in limited quantities from a few that we grow with Sindhri, Ashlul Moquarar, and Prince being some of the examples. Then there are some like Gilas, Safeda Lucknow and Dasheri that haven’t even bloomed once for us, although I know of Dasheri trees that have fruited here. Likely some of these would have a better shot at flowering in central or west-coast Florida, but the periodic freezes could also reduce the probability of them fruiting regularly.
In my opinion these types of mangos should be trialed in Southern California where their lack of precocity and requirement for a colder drier climate ought to be a better fit. I have at least heard of people having some success fruiting Sindhri there.
Mangos from southern India , depending on how one defines it, tend to perform better in Florida (but not always). Varieties like Iman Passand, Kesar, Rumani, Neelam, Mallika, Sonpari, Totapuri, And others have fruited well here. Even well-cared for Alphonso trees grown in the coastal-zone can fruit acceptably.
Part of the problem with the availability of the Pakistani mangos is that the USDA has not been allowing any mango plant material into the US for quite some time now even for permits, so farms and nurseries that might otherwise wish to legally obtain these varieties directly from Pakistan or India can’t do so. What few introductions that have been made were smuggled by private individuals.
Thanks to mislabeling as well as the aforementioned fraud on the part of the guavaking guy, there are a bunch of fake Anwar Ratol, Chaunsa and Langra in Florida. We obtained some of these years ago and they all turned out to be deliberate fakes that the guy had purchased from the Zill nursery and simply relabeled whatever he chose.
With regard to Langra, there are probably dozens of mangos called “Langra” in India itself. Checkout this study that shines some light on the topic:
https://www.researchgate.net/publication/284355201_Clonal_variability_studies_in_'langra'_mango_Mangifera_indica_L_using_morphological_biochemical_and_molecular_markersBased on literature the original Langra is likely the Langra Benarasi. This mango WAS in fact introduced to the US by some point in the first half of the 20th century because I’ve seen a photograph of the fruit at the old Honc orchard in Bokeelia. But it didn’t become well distributed. On the other hand, The “Langra Benarasi” later introduced by the USDA is a fraud.
There is a mango we got from the USDA labeled “Rataul” , presumably meant to be Anwar Rataul, which turned out to be Pim Sen Mun. Harry Hausman used to grow this also as I recall, not sure if he got his from Chapman field too.
I’m aware of some individuals claiming to have the real stuff. Time will tell if they do.
If we ever get back to the winters we used to enjoy in south Florida, then I think there will be an opportunity for some of the northern Indian/Pakistani mangos to fruit here at least better than they currently can with the right horticultural care.