August
2004
By
B. Rosie Lerner
Extension Consumer Horticulturist
Purdue University
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Pawpaw: The Midwest Banana?
Although the pawpaw is native to the eastern and central United States,
it is a surprisingly well-kept secret. Those who do know this fruit are
not likely to forget its delightful aroma and flavor. The pawpaw has been
called the Hoosier Banana, but probably only by Hoosiers themselves. The
same plant is also known as the Michigan Banana, Kentucky Banana and other
regional favorites. Botanically, the plant is known as Asimina triloba.
The tree can be found growing in low woods in much of the Midwest, with
the heart of its territory in the Ohio Valley.
Historically, Native Americans used strands of the inner bark of pawpaws
for making fabric and netting. A medicinal extract also was harvested
from the bark. More recent studies have looked at both anti-cancer and
pesticide properties of pawpaw extracts.
You may have guessed by now that the fruit does have a flavor somewhat
like a banana, although others have described the taste as similar to
mango. The fruits are greenish-yellow berries, which turn brownish-black
when fully ripe. Each fruit is about 2-5 inches long and can weigh up
to 8 ounces. The berries are borne in clusters that can have as many as
seven fruits.
Some backyard growers complain of poor fruit set on their pawpaws. There
is still some controversy over which insects are the primary pollinators.
Some believe honeybees to be the workers. Others declare that carrion
flies are responsible, while still others insist that it is a species
of beetle. The flowers do have a very rank odor, so flies and beetles
are the more likely bets.
Additionally, self-pollination does not occur within a flower so other
flowers must be nearby to provide a pollen source. Planting several trees
should help provide sufficient flowers. Where possible, hand pollination,
using a small artist's brush to carry the pollen from one flower to another,
may be of some help.
Harvest pawpaw when the fruit yields slightly to gentle thumb pressure,
usually in late September or October. The fruits have excellent flavor
when eaten fresh, but they bruise easily and do not keep well, even when
refrigerated. Fortunately, pawpaws can be dried or frozen for later use
or processed into ice cream, cakes, cookies, breads and pastries.
The pawpaw tree usually grows up to about 20 feet, although it can grow
taller in a favorable location. A sunny but moist, fertile, slightly acid
location is best. The leaves have a yellow fall color that can be brilliant
on some specimens. The pawpaw has a reputation for being very difficult
to transplant but it is available from many mail-order nurseries, including
the following Midwestern sources.
Midwestern Mail-order Sources for Pawpaw trees
Hartmann's Nursery
P.O. Box 100
Lacota, MI 49063-0100
(269) 253-4281
Nolin River Nut Tree Nursery
797 Port Wooden Road
Upton, KY 42784
(270) 369-8551
www.nolinnursery.com
Mellinger's Inc.
2310 W. South Range Rd.
North Lima, OH 44452-9731
(330) 549-9861
www.mellingers.com
Oikos Tree Crops
P.O. Box 19425
Kalamazoo, MI 49019-0425
(269) 624-6233
oikostreecrops.com
Park Seed
1 Parkton Ave.
Greenwood, SC 29647-0001
(800) 845-3369
www.parkseed.com
8-5-04
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