Montana ’s 2005 growing time of year in southwest Silver Bow County was 76 twenty-four hour period . The DoS ’s gardeners , depending on their location , coped with a 2005 rainfall of between 9 and 25 inches . The West Yellowstone surface area makes even appearances on the U.S. Lowest Daily Temperature list . A few hardy efflorescence tree , however , have managed to overcome the betting odds against survival in the Treasure State . Montana gardeners can depend on them for dependable functioning .

Redosier Dogwood

A pocket-sized tree diagram reaching only 12 feet high , redosier dogwood tree ( Cornus sericea ) is especially noticeable in wintertime for its carmine limb . During June , the trees have matt clusters of fragrant , creamy white , up to 2.5 - inch flowers attractive to butterflies . White Charles Edward Berry follow the peak . Purple tumble foliage provide more appeal .

Redosier cornel grows barbarian along Montana ’s riverbanks and other wet areas . Tolerant of temperature as low as minus 45 level F , it ’s hardy throughout Montana . Plant it in alkaline to somewhat acid , dampish , well - drained loamy grime and sun to part shade . tree suffer from a stove of gadfly and disease including bagworms and twig blight . Birds , mammal and deer feed on the yield , and several wildlife species shelter in redosier thickets .

Smoketree

Smoketree ( Cotinus obovatus ) is hardy in Montana ’s USDA Hardiness Zone 5 field , most of which are in the central and upper northwestern part of the nation . Native to Europe and China , it ’s a extremity of the shumac family that grows up to 15 feet mellow and wide . upstage smoketree ’s May and June clusters of small yellow flowers are clouds of garden pink to purple hairs the spent flower sprout later in the summertime . Their hazy effect accounts for the tree ’s name .

conform easy to most land , smoketree objects only to wet , poorly drain locations . It ’s happiest in full sun and loam but can care even infertile jumpy locations . over-embellished - allow for cultivar of bullet tree , pronounce the Lady Bird Johnson Wildflower Center , are especially attractive landscape plant life . All varieties are subject of superb chickenhearted , scarlet and royal fall foliage displays .

Oleaster

Oleaster ( Elaeagnaceae angustifolia ) is a 12- to 20 - infantry mellow and wide tree diagram native to Europe and central Asia . It ’s hardy throughout Montana except for a tiny Zone 2 domain in northwestern Beaverhead County . Oleaster has striking silvery - grey foliage company in May and June by evenly unusual , fragrant silvery flowers with golden - scandalmongering pharynx . eloquent olive - like yield follow the blossom . The fruit feed wildlife and cook tasty preserve . Peeling brown bark is an attractive winter feature .

Oleaster , say the Missouri Botanical Garden , is a rapid cultivator tolerant of a wide reach of precondition . It accept wet and wry soils – including heavy mud – high salinity , summer heat and strong idle words . Tree do well , however , in full sun and well - enfeeble , sandlike loam grime . They suffer in high humidness .

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