Cass County Extension

Non Adapted Woody Plants

Abelia - Abelia species and cultivars

Almond, Dwarf Flowering - Prunus grandulosa and cultivars, e.g., `Alba', `Alboplena', `Rosea', and `Sinensis'

Apple - Malus cultivars, e.g. `Braeburn', `Fuji', `Gala', `Golden Delicious', `Granny Smith', `Jonathon', `Red Delicious', `Rome Beauty', ‘Winesap’ and ‘Yellow Delicious’. Several have fruited in North Dakota when topworked on hardy trees but scion cultivar grafts kill in test winters.

Aralia - Aralia species and cultivars

Aralia, Fiveleaf - Acanthopanax sieboldianus

Arborvitae, Emerald - Thuja occidentalis `Smaragd’

Arborvitae, Giant or Western - Thuja plicata and cultivars

Arborvitae, Oriental - Platycladus orientalis and cultivars

Ash, Cimmaron - Fraxinus pennsylvanica ‘Cimmzam’

Ash, Emerald - Fraxinus pennsylvanica ‘Emerald’

Ash, European - Fraxinus excelsior and cultivars

Ash, Flowering - Fraxinus ornus

Ash, Honeyshade - Fraxinus pennsylvanica ‘Honeyshade’

Ash, Pumpkin - Fraxinus tomentosa

Azalea (Evergreen types) - Rhododendron species and cultivars (see trial list)

Barberry, Mentor - Berberis X mentorensis

Beautyberry - Callicarpa species and cultivars

Beautybush - Kolkwitzia amabilis and cultivars

Beech - Fagus species and cultivars

Birch, Monarch - Betula maximowicziana

Birch, White-barked Himalayan - Betula jackquemontii

Bluebeard - Caryopteris X clandonensis and cultivars

Boxelder, Variegated - Acer negundo `Varigatum' and `Flamingo'

Boxwood, Common - Buxus sempervirens and cultivars

Buckeye, Bottlebrush - Aesculus parviflora and cultivars

Bushclover, Shrub - Lespedeza bicolor and cultivars

Butterfly Bush - Buddleia species and cultivars (advertised in this area)

Buttonbush - Cephalanthus occidentalis

Cape Myrtle - Lagerstromia species and cultivars

Cedar - Cedrus species and cultivars

Cherry, Afterglow - Prunus X yedoensis ‘Afterglow’

Cherry, Oriental or Japanese Flowering - Prunus serrulata and cultivars

Cherry, Sweet - Prunus avium and cultivars, `Bing',` Royal Anne', and `Black Tatarian'

Chestnut - Castanea species

Contorted Hazel or Walking Stick - Corylus avellana `Contorta'

Coralberry, Chenault - Symphoricarpos X chenaultii

Cotoneaster, Bearberry - Cotoneaster dammeri and cultivars

Cotoneaster, Creeping - Cotoneaster adpressus and cultivars

Cotoneaster, Rock - Cotoneaster horizontalis & cultivars

Cotoneaster, Spreading - Cotoneaster divaricata

Crabapple, American Masterpiece - Malus ‘Amaszam’

Crabapple, Cardinal - Malus ‘Cardinal’

Crabapple, Parkman - Malus halliana `Parkmanii'

Crabapple, Sargent - Malus sargentii and cultivars

Crabapple, Tschonoski - Malus tschonoskii

Crabapple, Veitch - Malus yunnanensis var. veitchii

Crape-myrtle - Lagerstroemia species and cultivars

Cypress, Bald - Taxodium distichum

Deutzia - Deutzia species and cultivars (advertised in this area)

Dogwood, Cornelian Cherry - Cornus mas and cultivars

Dogwood, Flowering - Cornus florida (advertised in this area)

Dogwood, Kousa - Cornus kousa and cultivars

Dogwood, Winter Flame - Cornus sanguinea ‘Winter Flame’

Elm, Camperdown - Ulmus glabra ‘Camperdown’

Elm, Chinese - Ulmus parvifolia and cultivars (don't confused with Ulmus pumila, Siberian Elm)

Elm, Dutch - Ulmus X hollandica and cultivars

Elm, Frontier - Ulmus x `Frontier'

Elm, Homestead - Ulmus x `Pioneer'

Elm, Smoothleaf - Ulmus carpinifolia and cultivars

Elm, Urban - Ulmus x `Urban'

Elm, Wilson - Ulmus wilsoniana and cultivars

English Ivy - Hedera helix and cultivars (houseplant)

Euonymus, Spreading - Euonymus kiautschovicus

False Cypress - Chamaecyparis species and cultivars

Fir, Fraser - Abies fraseri and cultivars

Fir, Noble - Abies procera and cultivars

Firethorn - Pyracantha species and cultivars

Forsythia, Greenstem - Forsythia viridissima and cultivars

Forsythia, Weeping - Forsythia suspensa and cultivars

Fothergilla - Fothergilla gardenii and cultivars

Fringe-tree - Chionanthus and cultivars

Goldenrain-tree - Koelreuteria paniculata

Goldenchain Tree - Laburnum species and cultivars

Hackberry, Sugar - Celtis laevigata

Hawthorn, English - Crataegus laevigata and cultivars (syn. C. oxyacantha)

Hawthorn, Washington - Crataegus phaenopyrum

Hazel (Filbert), European - Corylus avellana and cultivars including `Contorta' (Contorted Hazelnut or Walking Stick)

Hibiscus - Hibiscus syriacus and cultivars

Hickory and Pecan - Carya species

Holly - Ilex species and cultivars (Ilex verticillata, Winterberry is a deciduous holly native in limited areas of Minnesota)

Hornbeam, European - Carpinus betulus and cultivars

Horse-chestnut, Common - Aesculus hippocastanum and cultivars (often confused with A. glabra, Ohio Buckeye, which is hardy)

Horse-chestnut, Red - Aesculus X carnea and cultivars

Houttuynia, Chameleon - Houttuynia cordata ‘Chameleon’

Hydrangea, Climbing - Hydrangea anomala subsp. petiolaris

Hydrangea, Oakleaf- Hydrangea quercifolia and cultivars

Jasmine - Jasminum species (may be sold as a houseplant)

Juniper, Shore - Juniperus conferta and cultivars

Juniper, Singleseed - Juniperus squamata and cultivars (`Blue Star’ seems to be hardy)

Juniper, Spiny Creek - Juniperus chinensis `Stricta' (syn. J. excelsa 'Stricta')

Juniper, Tripartita - Juniperus virginiana `Tripartita'

Linden, Pendant Silver - Tilia petiolaris

Linden, Silver - Tilia tomentosa

Katsura Tree - Cercidiphyllum japonicum

Kerria, Japanese - Kerria japonica and cultivars

Magnolia - Magnolia species and cultivars

Maple, Hedge - Acer campestre

Maple, Japanese - Acer palmatum and cultivars

Maple, Paperbark - Acer griseum

Maple, Three Flowered - Acer triflorum

Mulberry, Fruitless Weeping - Morus alba ‘Chaparral’

Oak, Black - Quercus velutina

Osage-Orange - Maclura pomifera

Pagodatree, Japanese - Sophora japonica and cultivars

Parrotia, Persian - Parrotia persica

Paulownia, Royal - Paulownia tomentosa

Peach - Prunus persica and cultivars, e.g., `Reliance' and `Elberta'

Pear - Pyrus cultivars, e.g., `Bartlett',` Kieffer'

Pear, Callery - Pyrus calleryana and cultivars

Persimmon - Diospyros species and cultivars

Planetree, London - Platanus x acerifolia and cultivars

Planetree, Oriental - Platanus orientalis

Plum, Newport - Prunus cerasifera ‘Newport’ (hardiest purple leafed cultivar in this species)

Porcelain Berry - Ampelopsis brevipedunculata and cultivars

Privet - Ligustrum species and cultivars, e.g., `Amoor River'

Quince, Flowering - Chaenomeles species

Redbud - Cercis species and cultivars (Minnesota strain is a bit hardier than the species)

Redwood, Dawn - Metasequoia glyptostroboides and cultivars

Rhodendron - Rhododendron species and cultivars (see trial plant list)

Rose, Multiflora - Rosa multiflora

Rose of Sharon (Shrub Althea) - Hibiscus syriacus and cultivars (commonly advertised in this area)

Silverbell, Carolina - Halesia carolina

Silver Lace Vine - Polygonum aubertii

Snowball, Fragrant - Viburnum X carlcephalum

Snowball, Japanese - Viburnum plicatum and cultivars

Spicebush - Lindera benzoin

Spirea, White Lace - Spiraea decumbens

St. Johnswort, Golden - Hypericum frondosum and cultivar `Sunburst'

Sumac, Shining - Rhus copallina

Sweetbush - Calycanthus floridus

Sweet Gum - Liquidambar styraciflua and cultivars

Sweetspire, Virginia - Itea virginica and cultivars

Tree of Heaven - Ailanthus altissima and cultivars

Tulip-Tree - Liriodendron tulipifera and cultivars

Viburnum, Alleghany - Viburnum X rhytidophylloides ‘Alleghany’

Viburnum, Birkwood - Virburnum X burkwoodii and cultivars

Viburnum, Blackhaw - Viburnum prunifolium

Viburnum, Doublefile - Viburnum plicatum and cultivars

Viburnum, Judd - Viburnum X juddi

Viburnum, Koreanspice - Viburnum carlesii and cultivars

Viburnum, Linden - Viburnum dilatatum and cultivars

Walnut, Carpathian - Juglans regia `Carpathian'

Walnut, English - Juglans regina

Witherod, Smooth - Viburnum nudum and cultivars

Yellowwood, American - Cladrastis kentukea

Yew, English - Taxus baccata and cultivars

Zelkova - Zelkova species and cultivars