Root-Damaging Temperatures, Vol. 12, Issue 5

G = Reported by Francis R. Gouin, American Nurseryman,October 1, 1977, pp 56-57. These are thetemperatures that will injure immature and possibly matureroots, but will not result in 100 percent kill of theroot systems in moist soils.DECIDUOUS PLANTSGenus species ................................................... °_FAcer circinatum, Vine Maple ................................. 0Acer ginnala, Amur Maple .................................... 0Acer macrophyllum, Bigleaf Maple ......................... 0Acer negundo'Variegatum',Variegated Box Elder ........................................ 10Acer palmatum, Japanese Maple ........................... 15'Atropurpureum ............................................ 15 (G)Acer platanoides, Norway Maple ............................ 0Acer rubrum, Red Maple ....................................... 0Acer saccharum, Sugar Maple ................................ 0Aesculus hippocastnum,Common Horsechestnut ....................................... 0Berberis thunbergii,Japanese Barberry .......................................... 10-15Betula papyrifera, Paper birch .............................. 0Betula pendula, European White Birch ................ 0Betula pendula 'Darlecarlica' ('Laciniata'),Cutleaf Weeping Birch ......................................... 0Carpinus betulus fastigiata, NarrowEuropean Hornbeam ............................................ 0Catalpa speciosa, Western Catalpa ....................... 0Chaenomeles speciosa, Flowering Quince……… 5Cornus floridaEastern Dogwood ............................... …..20 22 (G)Cornus mas, Cornelian Cherry ...........................18Cornus nuttallii, Pacific Dogwood .....................22Corpus stolonifera, Red Osier Dogwood ……... 18Cotinus coggygria, Smoketree ............................18Cotoneaster adpressus praecox .....................12 (G)Cotoneaster congestus ................................... 25 (G)Cotoneaster dammed ................................. 23 (G)'Skogholmen…… ...................................... 20 (G)Cotoneaster horizontalisRock Cotoneaster ......................................17 (G)Deutzia gracilis, Slender Deutzia ........................15Fagus sylvatica `Purpurea', Purple Beech……... 15Ginkgo biloba, Ginkgo, Maidenhair Tree ..……. 15Gleditsia triacanthos `Sunburst'Sunburst Honey Locust ................................... 10Koelreuteria paniculataGoldenrain-tree ...........................................16(G)Liquidambar styracifluaAmerican Sweetgum ....................................... 15Liqustrum vulgareCommon or English Privet ................................5Liriodendron tulipifera Tulip Tree .................. 18Magnolia x 'Ricki' ........................................... 20Magnolia x SoulangeanaSaucer Magnolia .......................................23 (G)Magnolia stellata, Star Magnolia ..........17 22 (G)