Hi all,
olà luisport,
pleasure to know you luisport.
you're right, I agree with you, we need mango tree of california highly resistant to cold (20F =-6.6c), it is very difficult to reaching in this part of southern Portugal, the lowest is 40F (maximum at night).
there are some mango trees endure it and the drought in the region, they can be put in the ground, as gommera 13-1 mango tree of spain, it resists very low temperatures with periods of drought.
anaxel.