Nannyberries in the pacific northwest? Do they ripen or do they rot?

I "discovered" nannyberries on Food Forest Nursery's website (because they have a 15% discount for those with PIE--it's just too tempting!).


Apparently, the berry tastes like a mix of plum and banana. That sounds pretty good! And, they ripen later in the season (like September/October), when I don't have many other berries ripe. But, then I realized most of my later season berries just rot and turn to mush thanks to all our rain, and my damp/dark north-facing slope. Many years we don't even get Himalayan blackberries, because they get that invasive fly laying eggs, and also mummy berry.

So, I thought I'd better ask and see if there's any other Pacific Northwest-type, damp-weather permies out there who have experience with this berry! Does it ripen here? Does it just rot? I'd love to know your experience!