Need expert annona advice!
There is very little information available in the US on this subject specifically.. some obscure and anecdotal evidence..
Basically I am looking for annonas that will survive comfortably in a lower 8b/northern 9a climate zone. Where minimum temps usually only dip into the upper or mid-20s, BUT every few years we will see rare, brief, mid-to-upper teens temps (which pretty much constitutes as a ‘moderately severe’ or ‘hard’ freeze). So once every 3-4 winters it might drop down to 17-20 degrees F.
So, from the information I have gathered so far, I believe these species are hardy for my climate zone:
Annona rugulosa
Annona/rollinia sylvatica
Annona/rollinia emarginata
Annona ubatubensis
“Dream” annona
Annona parviflora
And PERHAPS select individuals from these species:
Annona montana
Annona hayesii
Annona hypoglauca
Annona crassiflora
Perhaps some other types of Cherimoyas and Atemoyas.
And perhaps some types of Duguetias.
I have found that most of these hardier annonas originate from Southern Brazil, Uruguay, Argentina, and highland/ mountainous tropical/subtropical forests such as in Peru.
Any additional information would be GREAT! Thank you!
Also seed sources would be AWESOME!