Mustang Rootstock

www.jeffriesnurseries.com
Mustang ® Rootstock
Prunus x ‘Jefchum’
P. americana rootstock Mustang ®
Westcot & M-604 Apricot
on Mustang Rootstock
© Jeffries Nurseries Ltd., 2011

Mustang® Prunus Rootstock
Prunus x ‘Jefchum’
Jeffries Nurseries Ltd. has been working for 20 years on a clonal rootstock that would be
compatible with Prunus selections including fruiting plums, ornamental plums, apricots and
possibly peach. Hybrid seedlings of cherry-plum (complex salicina/americana/besseyi) were
evaluated for root anchorage, suckering of root and crown, propagation ease from hardwood/softwood
cuttings and wide compatibility.
‘Mustang’ is a complex Prunus hybrid with demonstrated potential for wide use as a clonal
understock. It has proven effective for budding various Prunus cultivars (both fruiting and
ornamental types) throughout North America. It is bud compatible with P. armeniaca
(Apricot), P. salicina (Japanese Plum), P. Americana (American Plum), P. persica (Peach) and
possibly other related stocks including Thundercloud.
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Botanical Name: Prunus x ‘Jefchum’
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Family:
Rosaceae
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Common Name: Mustang® Prunus Rootstock
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Origin:
Selected by Dr. Wilbert Ronald and Rick Durand of Jeffries Nurseries
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Advantages:
Mustang® has several advantages over other existing rootstocks:
o clonal rootstock with consistent budding results
o minimal suckering from understock (in contrast to P. americana)
o minimal basal suckering (in contrast to P. besseyi)
o fibrous root that provides strong anchorage (in contrast to P. besseyi)
o certified virus free from tissue culture
o wide compatibility across Prunus species
o ease of propagation from softwoods or hardwoods
o cold hardiness for production in zones 2, 3, 4, 5 and 6.
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Propagation:
Mustang® has been successfully rooted from 18” hardwood cuttings
using bottom heat for callus development followed by field planting un
der moist west coast conditions. Propagation has also been successful
from summer softwood cuttings. Spring planted, rooted softwood cut
tings have attained budding size by July. Certified Virus Indexed stock
is available in tissue culture.
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Protection:
Propagation by licensed growers only. Canadian TM registered. COPF
Royalty of 20 cents per plant.
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For additional information about Mustang® Prunus Rootstock,
contact Jeffries Nurseries Ltd.:
P.O. Box 402, Portage la Prairie, Manitoba, R1N 3B7, Canada
Phone: (204) 857-5288 Fax: (204) 857-2877 www.jeffriesnurseries.com
jeffnurs@mts.net