St. Croix™ elm is a new and distinct American elm with good tolerance to Dutch elm disease. With a grand, vase shape and an open, spreading canopy, St. Croix™ promises to revitalize this well-loved shade tree. Its summer foliage is a beautiful dark green with fall foliage turning a wonderful yellow. The selection is a clone from a tree in Minnesota that survived in a stand of DED-infected elms for over 35 years. In testing at the University of Minnesota, St. Croix shows very good DED tolerance in repeated field trials with controlled inoculation. Selected by Chris Bliska.