Among the colder states in the nation , Montana is in U.S. Department of Agriculture Plant Hardiness Zones 3b and 4a . Temperatures may drop to -30 degree F in the wintertime . Montana experiences concentrated freezes , gets plenty of snow and has sub - zero temperatures through much of the wintertime . The raise time of year is short , about 75 days . Montana summers are temperate and ironic . Some inhuman - weather nut trees expand in the this climate , and bear fruit in tumble or wintertime .

Black Walnut

Black Walnut ( Juglans nigra ) is native from the Eastern Seaboard to Minnesota but grows well in Montana ’s teetotal , mild summers . These deciduous trees , which may inhibit increase of other plants , can grow to 150 foot and create richly season nuts in a hard carapace . The trees have fatal - browned barque and high arm that form an oval or rotund head . leave are made up of mathematical group of up to 23 leaflets , each of which may be up to 5 inch long . Black Walnut Tree , also grown for their barque , are a hardwood that may be used in flooring or to make furniture . These trees require full Sunday and regular water . The Butternut Walnut ( J. cinera ) and some varieties of the English Walnut ( J. regia ) also are suitable for Montana .

Chinese Chestnut

Chinese Chestnut trees ( Castanea mollissima ) are hardy to Zone 4 and may be planted in southerly Montana . Chinese chestnuts , which produce a fragrant , edible nut in a relatively prickly shell , can grow to 45 foot and have dark green leaves of up to 8 inches that may turn amber or yellow before dropping in fall . Nuts are produced in wintertime . The Chinese chestnut tree is resistant to chestnut blight . It should be plant in full sun and get regular water but can tolerate drought . This tree diagram is highly adaptable and may be planted in dry or acidic soils .

Hazelnut

hazelnut tree , also known as Filberts , are a member of the Betulaceae menage and are native to North America . Commercially grow in Oregon , Washington and southern Canada , this tree is hardy enough to originate in Montana , though it may not bring on nuts . A hazelnut tree diagram can grow to 15 ft and produces all-day sucker branches that must be cleared to forefend shape a thicket . transverse - pollination is want , so two tree diagram should be planted if crackpot are desired . cobnut trees should be planted in full Lord’s Day and require regular water . The cobnut itself is small and tasty and develop in a tough , deep brown , acorn - shaped shell . The nut is often used in confections and feast or may be mixed with chocolate in truffles . It is also a democratic flavoring for coffee .

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