Dura-Heat® River Birch (Betula nigra 'BNMTF)&lt;br /&gt;
Superlative lustrous dark green leaves that turn soft butter yellow in fall.  Creamy white bark exfoliates in 1&quot; - 2&quot; diameter branches.  Bark appearance is superior at an early age.  Denser canopy than other River Birch selections.  An outstanding selection for residential or commercial landscapes.  Resistant to Bronze Birch Borer.  Height 40 ft., spread 25-30 ft.  Cold hardy to USDA Zone 5, maybe 4.