Plants for USDA hardiness zone 6

Aaron's rod (Thermopsis villosa)

Abelmoschus esculentus (Abelmoschus esculentus)

Abies delavayi (Abies delavayi)

Abies mariesii (Abies mariesii)

Abies recurvata (Abies recurvata)

Acacia decurrens (Acacia decurrens)

Acer argutum (Acer argutum)

Acer distylum (Acer distylum)

Acer oblongum (Acer oblongum)

Aconite (Aconitum napellus)

Actinidia polygama (Actinidia polygama)

Acuminate cotoneaster (Cotoneaster acuminatus)

Adder's Tongue (Ophioglossum vulgatum)

Adonis amurensis (Adonis amurensis)

Adria Bellflower (Campanula portenschlagiana)

Adriatic Bellflower (Campanula fenestrellata)

Adriatic Bellflower (Campanula garganica)

African Marigold (Tagetes erecta)

Ageratina aromatica (Ageratina aromatica)

Akebia (Akebia quinata)

Alchemilla alpina (Alchemilla alpina)

Alder (Alnus glutinosa)

Alecost (Tanacetum balsamita)

Aleppo Oak (Quercus infectoria)

Aletris farinosa (Aletris farinosa)

Alfalfa (Medicago sativa)

Algerian Tea (Paronychia argentea)

Alhagi maurorum (Alhagi maurorum)

Alisma canaliculatum (Alisma canaliculatum)

Alkanet (Anchusa officinalis)

Alleghany Blackberry (Rubus allegheniensis)

Allegheny Barberry (Berberis canadensis)

Allegheny Plum (Prunus alleghaniensis)

Allegheny Shadberry (Amelanchier laevis)

Allegheny spurge (Pachysandra procumbens)

Alliaria petiolata (Alliaria petiolata)

Allium acuminatum (Allium acuminatum)

Allium aflatunense (Allium aflatunense)

Allium ampeloprasum (Allium ampeloprasum)

Allium carinatum (Allium carinatum)

Allium cepa (Allium cepa)

Allium cernuum (Allium cernuum)

Allium chinense (Allium chinense)

Allium drummondii (Allium drummondii)

Allium fistulosum (Allium fistulosum)

Allium flavum (Allium flavum)

Allium geyeri (Allium geyeri)

Allium giganteum (Allium giganteum)

Allium ledebourianum (Allium ledebourianum)

Allium platycaule (Allium platycaule)

Allium porrum (Allium porrum)

Allium ramosum (Allium ramosum)

Allium scorodoprasum (Allium scorodoprasum)

Allium tricoccum (Allium tricoccum)

Allium tuberosum (Allium tuberosum)

Allium ursinum (Allium ursinum)

Allium victorialis (Allium victorialis)

Allium vineale (Allium vineale)

Almond (Prunus dulcis)

Almond-leaved pear (Pyrus amygdaliformis)

Alnus cordata (Alnus cordata)

Alnus incana (Alnus incana)

Alnus japonica (Alnus japonica)

Alnus maritima (Alnus maritima)

Alnus maximowiczii (Alnus maximowiczii)

Alnus serrulata (Alnus serrulata)

Alpenrose (Rhododendron ferrugineum)

Alpine Blueberry (Vaccinium deliciosum)

Alpine Calamint (Acinos alpinus)

Alpine Currant (Ribes alpinum)

Alpine Dock (Rumex alpinus)

Alpine Forget-Me-Not (Myosotis alpestris)

Alpine French Honeysuckle (Hedysarum hedysaroides)

Alpine Rock Cress (Arabis alpina)

Alpine Spring Beauty (Claytonia megarhiza)

Alpine Strawberry (Fragaria vesca 'Semperflorens')

Alpine Sweetvetch (Hedysarum alpinum)

Alpine Wormwood (Artemisia umbelliformis)

Althaea cannabina (Althaea cannabina)

Althaea officinalis (Althaea officinalis)

Alum Root (Heuchera micrantha)

Alum Root (Heuchera cylindrica)

Amaranthus blitoides (Amaranthus blitoides)

Amaranthus blitum (Amaranthus blitum)

Amaranthus caudatus (Amaranthus caudatus)

Amaranthus cruentus (Amaranthus cruentus)

Amaranthus hybridus (Amaranthus hybridus)

Amaranthus hypochondriacus (Amaranthus hypochondriacus)

Amaranthus tricolor (Amaranthus tricolor)

Amelanchier spicata (Amelanchier spicata)

American Arbor-Vitae (Thuja occidentalis)

American Basswood (Tilia americana)

American Beech (Fagus grandifolia)

American Blackcurrant (Ribes americanum)

American Bladder Nut (Staphylea trifolia)

American Blue Vervain (Verbena hastata)

American Dewberry (Rubus canadensis)

American Dragonhead (Dracocephalum parviflorum)

American Elm (Ulmus americana)

American Germander (Teucrium canadense)

American Great Burnet (Sanguisorba canadensis)

American Hazel (Corylus americana)

American Holly (Ilex opaca)

American Honeysuckle (Lonicera canadensis)

American Ipecacuanna (Gillenia stipulata)

American Liquorice (Glycyrrhiza lepidota)

American Liverleaf (Hepatica acutiloba)

American Liverleaf (Hepatica americana)

American Pennyroyal (Hedeoma pulegioides)

American Plum (Prunus americana)

American Red Raspberry (Rubus strigosus)

American Spikenard (Aralia racemosa)

American Vetch (Vicia americana)

American Water Lotus (Nelumbo lutea)

American Wisteria (Wisteria frutescens)

American hornbeam (Carpinus caroliniana)

American persimmon (Diospyros virginiana)

Amur Cork Tree (Phellodendron amurense)

Amur Maackia (Maackia amurensis)

Amur Maple (Acer ginnala)

Amur River Grape (Vitis amurensis)

Amur daylily (Hemerocallis middendorffii)

Anchusa (Anchusa azurea)

Anethum graveolens (Anethum graveolens)

Angelica (Angelica archangelica)

Anise Hyssop (Agastache foeniculum)

Aniseed Tree (Illicium floridanum)

Aniseroot (Osmorhiza longistylis)

Annual Fleabane (Erigeron annuus)

Annual Meadow Grass (Poa annua)

Annual Yellow Sweetclover (Melilotus indicus)

Anomalous peony (Paeonia anomala)

Anthriscus cerefolium (Anthriscus cerefolium)

Aphananthe aspera (Aphananthe aspera)

Apocynum venetum (Apocynum venetum)

Appalachian Gooseberry (Ribes rotundifolium)

Appalachian barren strawberry (Waldsteinia fragarioides)

Apple (Malus domestica)

Apple Rose (Rosa villosa)

Apricot (Prunus armeniaca)

Aquilegia coerulea (Aquilegia coerulea)

Aquilegia flabellata (Aquilegia flabellata)

Aquilegia flavescens (Aquilegia flavescens)

Aquilegia formosa (Aquilegia formosa)

Aquilegia pubescens (Aquilegia pubescens)

Aralia nudicaulis (Aralia nudicaulis)

Aralia spinosa (Aralia spinosa)

Arctic Bramble (Rubus arcticus)

Arisaema (Arisaema tortuosum)

Arisaema flavum (Arisaema flavum)

Arisaema jacquemontii (Arisaema jacquemontii)

Arisaema serratum (Arisaema serratum)

Arizona Maderone (Arbutus arizonica)

Arnica (Arnica montana)

Arrow Head (Sagittaria sagittifolia)

Arrow Wood (Viburnum dentatum)

Artemisia dracunculus (Artemisia dracunculus)

Artemisia scoparia (Artemisia scoparia)

Artichoke (Cynara cardunculus)

Asarabacca (Asarum europaeum)

Asarum maximum (Asarum maximum)

Ash (Fraxinus excelsior)

Asian lizard's tail (Saururus chinensis)

Asiatic Sweetleaf (Symplocos paniculata)

Asparagus (Asparagus officinalis)

Asphodel (Asphodelus albus)

Astilbe (Astilbe thunbergii)

Atlantic Camas (Camassia scilloides)

Atlantic Pigeonwings (Clitoria mariana)

Atlas Deodar (Cedrus atlantica)

Aubretia (Aubrieta deltoidea)

Aurinia saxatilis (Aurinia saxatilis)

Australian Bugle (Ajuga australis)

Austrian Pine (Pinus nigra)

Autumn Crocus (Colchicum autumnale)

Autumn Lady's Tresses (Spiranthes spiralis)

Autumn olive (Elaeagnus parvifolia)

Autumn olive (Elaeagnus umbellata)

Avalanche Lily (Erythronium grandiflorum)

Azarole (Crataegus azarolus)

Azure bluet or Quaker ladies (Houstonia caerulea)

Azure sage (Salvia azurea)

Baby's Breath (Gypsophila paniculata)

Bachelor's button (Kerria japonica)

Baikal Skullcap - Huang-Qin (Scutellaria baicalensis)

Balmony (Chelone glabra)

Balsam Fir (Abies balsamea)

Balsam Root (Balsamorhiza hookeri)

Baltic Rush (Juncus balticus)

Bamboo (Pseudosasa japonica)

Ban Xia (Pinellia ternata)

Banksia Rose (Rosa banksiae)

Bao li (Quercus serrata)

Barberry (Berberis vulgaris)

Barley (Hordeum vulgare)

Barnyard Millet (Echinochloa crus-galli)

Barrenwort (Epimedium grandiflorum)

Basil (Ocimum basilicum)

Basil Thyme (Acinos arvensis)

Bath Asparagus (Ornithogalum pyrenaicum)

Beach Aster (Erigeron glaucus)

Beach Grass (Ammophila breviligulata)

Beach Pea (Lathyrus japonicus)

Beach Pine (Pinus contorta)

Beach Plum (Prunus maritima)

Beach Strawberry (Fragaria chiloensis)

Beach Wormwood (Artemisia stelleriana)

Beachhead Iris (Iris setosa)

Beak Willow (Salix bebbiana)

Beaked Hazel (Corylus cornuta)

Beale's barberry (Mahonia bealei)

Bearberry (Arctostaphylos uva-ursi)

Beaumont's Root (Veronicastrum virginicum)

Beautyberry (Callicarpa japonica)

Bee Orchid (Ophrys apifera)

Beech (Fagus sylvatica)

Beet (Beta vulgaris vulgaris)

Bellwort (Uvularia sessilifolia)

Bellwort (Uvularia perfoliata)

Berberis amurensis (Berberis amurensis)

Berberis empetrifolia (Berberis empetrifolia)

Berberis gagnepainii (Berberis gagnepainii)

Berberis verruculosa (Berberis verruculosa)

Berchemia racemosa (Berchemia racemosa)

Bergamot (Monarda didyma)

Bergenia ciliata (Bergenia ciliata)

Bermuda Blue-Eyed Grass (Sisyrinchium angustifolium)

Bermuda Grass (Cynodon dactylon)

Berry Bladder Fern (Cystopteris bulbifera)

Beth Root - Indian Balm (Trillium erectum)

Betoum (Pistacia atlantica)

Big Bluestem (Andropogon gerardii)

Big Tree (Sequoiadendron giganteum)

Big-Leaf Lupin (Lupinus polyphyllus)

Bighead Clover (Trifolium macrocephalum)

Bigleaf Aster (Aster macrophyllus)

Bigleaf Magnolia (Magnolia macrophylla)

Bigroot Geranium (Geranium macrorrhizum)

Bigseed Biscuitroot (Lomatium macrocarpum)

Bilberry (Vaccinium myrtillus)