Try Cliff England (Jerry Lehman) VE -21
I just realized Something today I found These out side , realized VE stands for Very Early
(he said they were Early (i was thinking Vermont VE for the longest time)
That the best with Cultivars Summer Delight may also be a good choice
(and I am sure Triloba tracker has good advice )
I have heard of people growing them in MN
could be good to put a grove of them for a latter ripening harvest then everyone else.
(I almost Forgot )
I am not the best with Knowing about the climates , and such, but
Michigan Is zone 6 , a Micro Climate , because Lake Michigan Holds heat from the Sun
the LAKE being on the West side
Blow the wind West to East, and makes the Climate "in the Winter" warmer than Chicago.
I am editing out the rest of this post because I really am not certain , and
I tried to explain How they Grow Grapes
(Pinot Noir type (hybrid marquette)
better having a cooler climate
I am No expert, and it does get confusing
SO If someone Knows, and can explain
(I used to visit a breeding grape site, but do not know myself)
I do Hear Pawpaw season In MI is Mid October
My Limited experience Says it is earlier Here (mid September with one tree)
I am pretty Sure we get More Humidity here (on the west side of the lake)
, but this isn't personal experience.
(Only time I been in MI for 2 days In July or August )
Note I do Hear Of Britains Mild Raining climate , and people grow things you wouldn't think
with early types (as with Persimmon ) I would ask Cliff England his advice ,
and I have not been online for 2 years, So I haven't read up for a while,
but people do different things in Certain places (white gravel to reflect sun , black Lava rock to absorb Sun)