Assertion: elm's cultivar | /r/HasProperty | valley forge
Facets:
Source sentences:
text: Several cultivars of American Elm, 'Valley Forge' (zone 5-8, excellent DED tolerance - may be the most tolerant of the lot), 'New Harmony' (zone 4-8, excellent tolerance to DED-second to 'Valley Forge', fat vase-more rounded than 'Valley Forge'), 'Princeton' (fast grower, resists elm leaf beetle, third in tolerance close behind 'New Harmony'), and 'Washington' and Delaware #2 (intermediate tolerance to DED), and `American Liberty' (very susceptible to elm yellows, less DED tolerant than others) are now becoming available.
text: One cultivar, called Valley Forge, has proven very resistant to the Dutch elm disease and the tree attains heights of 70 feet, with a spreading canopy 60 feet wide.