I'am not happy that he might be failing but just trying to find out facts of the matter!
I find it interesting that folks claim there are no cold hardy Mango's when I understand that there are varieties from India that grow in colder mountain regions! Or is that a hoax's too!
Would be interesting to find out for sure!
I wouldn't be surprised if a cold hardy mango was discovered someday. Maybe next year, maybe not in my lifetime. My rationale for is Dr. Campbell claimed that the jackfruit from Fairchild's jackfruit program as seedlings survived a freeze that killed mature jackfruit right next to the seedlings. Thus, all of Fairchild's seedling jackfruit are likely more cold tolerant than regular jackfruit. Get 10,000 mango seeds and plant them in a colder temperature, see what survives. Repeat this enough and you should get a cold tolerant mango. After getting a cold tolerant mango, then the process would be repeated for other desireable characteristics, like good tasting, productive, disease resistance, etc.
It is far easier to buy mangos from
www.MangosByMail.com, than to develop a cold hardy mango.