Betula nigra Dura-Heatâ„¢, Dura-Heat Birch

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The cultivar name is 'BNMTF' and is trademarked Dura-Heatâ„¢. Reported to be a Florida seed source. Foliage is smaller, closer together on the twigs, thicker than the species, and is more persistent in fall. The trees I have seen appear more dense than the species, yet they grow at a very rapid rate - faster than the cultivar Heritageâ„¢ in the south. Foliage is smaller and more leathery than Heritageâ„¢. Root system is reported by growers to be densely branched and compact. Trees can transplant in summer, even in the deep south, without problems provided irrigation is present. Birch pollen causes significant allergy in some people but pollen is produced for only a short period and in small amounts.

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