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THE AMERICAN LIBERTY ELM
A HISTORY OF GROWING SUCCESS
A Proud Heritage Of Research & Development
Origin:
The American Liberty Elm is
derived from controlled pollinations made in 1968 and 1970 between parent
trees which showed superior resistance to Dutch elm disease (D.E.D.) fungus
(Ceratocystis ulmi) in a nationwide American elm screening
program, consisting of more than 17,000 trees.
Disease-Resistance:
The parent trees survived inoculations
with C. ulmi in eight different years. They have lived for many years in
situations of induced disease and severe bark beetle pressure. The American
Liberty Elm is a cross-pollinated clone of these tough parent trees. Due to
its unique cell structure, the Liberty Elm is capable of walling off the
fungus. In most instances, it will keep on growing, even if infection should
occur. The reported results from over 20 years of street testing, proves
this tree is 99% resistant to D.E.D.
Description :
The American Liberty Elm grows
quickly, averaging two to three feet of growth per year. It develops a
vigorous upright main trunk in youth, with older branches becoming more
horizontal at maturity. These trees are ideal for street planting and can be
planted under power wires. Over thirty-five years of demonstration plantings
have shown the trees, when properly pruned, will develop the classic vase
shape of the traditional American elm at an early age and can be expected to
reach heights of 100 ft. or more. An extremely hardy tree, Ulmus americana
is tolerant of conditions such as pollution, drought, salt and a wide range
of temperatures, with few insect or disease problems. (zones 2-9)
Lifetime Warranty:
Elm Research Institute will
replace any American Liberty Elm that succumbs to Dutch elm disease at
anytime.
Ready to order
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