I figure I may as well post my notes so the next guy doesn't have to look it all up all over again. I've never even seen a pawpaw. I'm simply going to try ten of them where I lost my ash (pun not intended) before invasives take over that area.
Rootstock
Yellow River Nurseries by Marshfield, WI, has pawpaw seedlings. Their website said there were sold out. They weren't. Ten 18-36" seedlings cost me $49.50. They dig up their trees in spring, so they will probably be available sometime during the second half of April.
Scions
The head of Kentucky State University's pawpaw program recommended the below listed varieties at the 2025 International Pawpaw Conference. I have typed Stark Brother's zone rating and ripening timing after each one in parentheses. The three KSU varieties appear to be on patent.
KSU Atwood (5, late Sep / early Oct)
KSU Benson (5, Sep / Oct)
KSU Chappell (5, Sep)
Sunflower (4, Sep / Oct)
Overleese (4, late Sep)
NC-1 (4, late Sep)
Susquehanna (5, Sep)
Potomac (5, Sep / Oct)
Wabash (5, Oct)
Shenandoah (5, Sep)
Stark Brothers listed a few additional zone 4 varieties: Mango, Pennsylvania Golden, and Prolific.
Descriptions of many varieties can be found here:
Planting spacing of 8' is commonly recommended. A typical height at maturity in full sun is 15-25'. They grow shorter and wider in shade.
Shielding pawpaws from direct sunlight is recommended during the first one or two years. Tree tubes can be used for that. Pawpaws will bear better if exposed to direct sunlight during their bearing years, which for grafted varieties can be expected to begin around year 3+/- or year 6+/- for seedlings.
If anyone wants to trade me some Shenandoah, Wabash, Potomac, Susquehanna, NC-1, Overleese, Sunflower, or Mango scions for apple or pear scions, you are invited to go to the "2026 Scion Exchange" thread and see what I have listed.