KSU-Atwood™ Pawpaw (Asimina triloba) is one of the first cultivars released by the Kentucky State University pawpaw breeding program and is renowned for its exceptional productivity. Capable of producing more than 150 fruits per tree under ideal conditions, KSU-Atwood™ consistently delivers very high quality, medium to large fruit with sweet, custardy flesh, and few seeds.
In Blake Cothron's book, Pawpaws, in which he rates over 165 cultivars, he gives KSU-Atwood™ an A+, saying "this is one of the author's favourite pawpaw cultivars," and noting it's excellent flavour and texture, as well as disease resistance. KSU-Atwood™ also ripens early to mid season, which is ideal for northern gardens with shorter summers.
WHAT ARE PAWPAW TREES?
Pawpaws are highly prized fruit trees. Often called a “tropical fruit for the north,” pawpaws produce clusters of large, nutritious fruit 3–6 inches long with a custard-like texture and a flavour that’s been compared to mango, banana, pineapple, and even vanilla custard.
Unlike most tropical relatives in the custard apple family, pawpaws are uniquely cold-hardy to -25ºC (-13ºF), thriving in Zones 5–8 and capable of handling Canadian winters in many regions. Pawpaws are native to eastern North American, including southern Ontario.
In nature, young pawpaw trees grow in the dappled shade of forest understories, gradually being exposed to increasing amounts of direct sunlight as they grow taller. Direct sunlight can injure young pawpaws, so it’s best to provide shade for the tree's first 2 years of life — whether by keeping it potted in the shade, planting behind a fence, in a large tree tube, or using a temporary shade screen. Trees purchased 5.5" band pots and 1-gallon pots will need one more year of shade. Plants in 2-gallon pots and larger will be old enough for full sun, assuming they started the year in full sun. Moving from shade to sun during the summer is not advisable.
Most pawpaws require cross-pollination with a different pawpaw cultivar, or a seed-grown pawpaw. Seed-grown pawpaws are all genetically unique, so you can have two seedlings pollinate each other, or one seedling and one cultivar, or two cultivars. Named cultivars are grafted and selected for their exceptional fruit quality and yield. With seed-grown pawpaws, fruit is usually smaller and quality can vary widely.
With an ever-growing, cult-like following, pawpaws reward growers with one of the rarest, largest and most delicious fruits you can grow in a northern garden.
Common names: KSU-Atwood Pawpaw, Atwood Pawpaw, Atwood Paw Paw, Kentucky State University Atwood Pawpaw
Edible: Fruit
Harvest timing: Early season (late September - early October)
Scientific name: Asimina triloba 'KSU 8-2' (aka KSU-Atwood™)
Light requirements: Shade the first 2 years, full sun (6+ hours) the rest of its life
Full-grown size: 12-15' tall, with a natural pyramidal shape requiring very little pruning
Hardiness: Zone 5
Pollination: Requires cross-pollination with a different named cultivar or a seed-grown pawpaw.
Wildlife: Deer resistant leaves; fruit is attractive to wildlife.
Origin: Native to eastern North America. Cultivar bred by Kentucky State University and released in 2016.
Noteworthy: You will probably never taste one unless you grow one! The fruit bruises easily so they are not shipped to grocery stores.
