Acanthus mollis Actaea racemosa ‘Rue Ledan’ The Bear’s breeches Black cohosh Mediterranean North America Plants Acanthaceae Ranunculaceae Perennial Perennial at a Z 6–8 Z 2–9 spring summer h h Glance H4' H H H6' H S SS Botanical name Acanthus spinosus Actaea simplex ‘Cultivar’ ‘James Compton’ Common name Bear’s breeches Bugbane Origin of species Mediterranean SE Asia, Japan, China Family Acanthaceae Ranunculaceae Category Perennial Perennial image Hardiness zones Z 5–8 Z 3–8 Bloom season summer fall Height h 3'h 3'h Light H H H H Moisture SS SS SS low medium high Achillea millefolium Agastache rupestris H H H H H H ‘Credo’ S SS SSS Yarrow Sunset hyssop Mediterranean Arizona, New Mexico Asteraceae Lamiaceae Perennial Perennial Z 4–9 Z 4–9 summer summer–fall h h H2' H H H3' H H S S Allium Allium hollandicum Amsonia tabernaemontana ‘Globemaster’ ‘Purple Sensation’ Flowering onion Purple globe onion Eastern blue–star Garden origin Garden origin Eastern United States Alliaceae Alliaceae Apocynaceae Naturalizing bulb Naturalizing bulb Perennial Z 6–10 Z 4–8 Z 3–9 spring spring spring 3'h 2'h 2'h H H H H H H H H S S SS Allium Allium moly Anemone ‘Summer Beauty’ ‘Jeannine’ ‘Pamina’ Ornamental onion Flowering onion Windflower Garden origin Southern Europe Garden origin Alliaceae Alliaceae Ranunculaceae Naturalizing bulb Naturalizing bulb Perennial Z 4–9 Z 3–9 Z 4–8 summer spring–summer summer–fall 1'h 1'h 3'h H H H H H H H H S S S Allium cowanii Amsonia hubrichtii Anemone acutiloba Ornamental onion Arkansas blue star Sharp–lobed liverleaf Mediterranean North America Eastern N. America Alliaceae Apocynaceae Ranunculaceae Naturalizing bulb Perennial ?????????? Z 7–9 Z 5–8 Z 3–8 spring spring spring 1'h 3'h 7"h H H H H H H H S S SS Anemone hupehensis Anemone nemerosa Anemone x hybrida ‘Crispa’ ‘Honorine Jobert’ Parsley–leaf windflower Crow’s foot Windflower China Siberia, Arctic Garden origin Ranunculaceae Ranunculaceae Ranunculaceae Perennial ??????????? Perennial Z 5–8 Z 3–7 Z 4–8 fall spring fall 2'h 4"h 4'h H H H H H S SS S Anemone hupehensis Anemone nemerosa Aruncus ‘Hadspen Abundance’ ‘Vestel’ ‘Horatio’ Chinese anemone Wood anemone Goatsbeard China Siberia, Arctic Garden origin Ranunculaceae Ranunculaceae Rosaceae Perennial ??????????? Perennial Z 5–7 Z 3–7 Z 4–8 fall early spring ????????? 3'h 6"h 32"h H H H H H S SS S Anemone hupehensis Anemone tomentosa Asarum canadense ‘Rosenscale’ ‘Robustissima’ Windflower Grape leaf anemone Wild–ginger China China North America Ranunculaceae Ranunculaceae Aristolochiaceae Perennial Perennial Perennial Z 4–8 Z 3–8 Z 4–6 fall summer–fall spring 2'h 3'h 1'h H H H H H S S SS Asclepias incarnata Astrantia major Ba ‘Claret’ ‘Snowbank’ Swamp milkweed Masterwort North America Europe Asclepiadaceae Apiaceae Perennial Perennial Z 3–9 Z 4–7 summer spring 3'h 1'h H H H H H SS SS Astilbe chinensis Astrantia major Brunnera macrophylla ‘Visions in Pink’ ‘Roma’ ‘Jack Frost’ Chinese astilbe Masterwort Siberian bugloss Central West Asia Europe East Europe Saxifragaceae Apiaceae Boraginaceae Perennial Perennial Perennial Z 4–8 Z 4–7 Z 3–8 spring spring, fall spring 3'h 2'h 1'h H H H H SS SS SS Astilbe chinensis Bottonia asteroides Camassia leichtlinii ‘Visions in Red’ ‘Pink Beauty’ ‘Blue Danube’ Chinese astilbe Central West Asia Saxifragaceae Perennial Z 4–8 spring 1'h H H SS Camassia quamash Carex pensylvanica Chasmanthium latifolium Indian hyacinth Pennsylvania sedge Northern sea–oats Western N. America Eastern N. America North America Liliaceae Cyperaceae Poaceae Naturalizing bulb Grass Grass Z 3–9 Z 4–9 Z 4–10 spring spring summer 1'h 1'h 3'h H H H H H SS SS S Carex appalachica Cedrus atlantica Chelone glabra Appalachian sedge Blue atlas cedar Eastern N. America Northwest Africa Cyperaceae Pinaceae Grass Tree Z 4–9 Z 6–9 spring summer 1'h 60'h H H H S S Carex muskingumensis Ceratostigma plumbaginoides Chionodoxa forbesii ‘Blue Giant’ Palm branch sedge Hardy plumbago Glory–of–the–snow North America China Turkey, Crete, Greece Cyperaceae Plumbaginaceae Liliaceae Grass Perennial Naturalizing bulb Z 3–8 Z 6–9 Z 3–8 spring–summer fall spring 2'h 1'h 6"h H H H H H H SS S S Chionodoxa sardensis Clematis x jouiniana Crocus chrysanthus ‘Praecox’ ‘Cream Beauty’ Turkish glory–of– Ground cover the–snow clematis Snow, crocus Crete, Cyprus, Turkey Garden origin Greece, Turkey Liliaceae Ranunculaceae Iridaceae Naturalizing bulb Perennial Naturalizing bulb Z 3–9 Z 3–9 Z 4–11 spring summer–winter spring 6"h 1'h 4"h H H H H H H H S S SS Clematis heracleifolia Comptonia peregrina Crocus chrysanthus ‘China Purple’ ‘Lady killer’ Tube clematis Sweetfern Central and North Eastern N. America Snow, crocus China Myricaceae Greece, Turkey Ranunculaceae Shrub Iridaceae Perennial Z 2–9 Naturalizing bulb Z 5–9 spring–summer Z 4–11 summer–autumn 4'h spring 4'h H H H 4"h H H S H H H S SS Clematis heracleifolia Crocus chrysanthus Crocus pulchellus ‘Wyevale’ ‘Blue Pearl’ ‘Zephyr’ Tube clematis Central and North Snow crocus Autumn crocus China Greece, Turkey Balkans, NW Turkey Ranunculaceae Iridaceae Iridaceae Perennial Naturalizing bulb Naturalizing bulb Z 3–8 Z 4–11 Z 5–8 summer spring fall 3'h 4"h 5"h H H H H H H H H S SS SS Crocus sativus Dichel ostenma congestum Dodecatheon jeffreyi ‘Ookow’ Saffron crocus Jeffrey’s shooting star Greece, Asia Minor Western N. America Iridaceae Primulaceae Naturalizing bulb ??????????? Z 6–9 Z 4–8 fall spring 8"h 1'h H H H S SS Crocus Speciosus Digitalis ferruginea Dryopteris erythrosora ‘Conqueror’ ‘Brilliance’ Rusty foxglove Japanese shield fern Southern Europe Eastern Asia Scrophulariaceae Dryopteridaceae Perennial Perennial Z 4–8 Z 5–8 summer NA 4'h 2'h H H H S S Crocus tommasinianus Digitalis grandiflora Echinacea tennesseensis ‘Barr’s Purple’ ‘Rocky Top’ Woodland crocus Yellow foxglove Tennessee coneflower Europe Europe Tennessee, N. America Iridaceae Scrophulariaceae Asteraceae Naturalizing bulb Perennial Perennial Z 3–8 Z 3–8 Z 5–9 spring spring spring–fall 4"h 3'h 2'h H H H H H H H SS S S Epimedium grandiflorum Epimedium x versicolor Erythronium ‘Sulphureum’ ‘Pagoda’ Fairy wings Bishop’s hat Trout lily Northeast Asia Garden origin Garden origin Berberidaceae Berberidaceae Liliaceae Perennial Perennial Z 3–8 Z 5–8 Z 5–9 spring spring spring 1'h 1'h 1'h H H H H H SS SS SS Epimedium grandiflorum Eranthis hyemalis Erythronium ‘Lilafee’ ‘White Beauty’ Bishop’s Hat Winter aconite Trout lily Northeast Asia South and East Europe Garden origin Berberidaceae Ranunculaceae Liliaceae Perennial Naturalizing bulb Naturalizing bulb Z 5–9 Z 3–8 Z 3–8 spring spring spring 1'h 3"h 1'h H H H H H H H SS SS SS Epimedium x perralchicum Eryngium yuccifolium Eupatorium maculatum ‘Frohnleiten’ ‘Gateway’ Barrenwort Rattlesnake master Joe–Pye weed Garden origin S. and E. United States Eastern N. America Berberidaceae Apiaceae Asteraceae Perennial Perennial Perennial Z 5–9 Z 4–8 Z 3–9 spring summer summer 1'h 3'h 6'h H H H H H H H S S S Euphorbia Fritillaria camschatcensis Galanthus nivalis ‘Excalibur’ ‘Flore Pleno snowdrop’ Kamchatka lily Spurge N.W. America, Garden origin Siberia Euphorbiaceae Liliaceae Perennial Naturalizing bulb Z 5–9 Z 3–8 spring spring 3'h 1'h H H H H H S SS Euphorbia amygdaloides var. robbiae Fritillaria elwesii Galanthus nivalis ‘Snowdrop’ Mrs. Robb’s bonnet spurge Fritillary Northwestern Turkey Turkey Euphorbiaceae Liliaceae Perennial Naturalizing bulb Z 6–9 Z 3–8 spring spring 2'h 1'h H H H H S SS Eurybia divaricata (syn. Aster divaricatus) Galanthus elwesii Geranium ‘Giant snowdrop’ ‘Dilys’ White wood aster Cranesbill Eastern N. America Garden origin Asteraceae Geraniaceae Perennial Perennial Z 4–8 Z 4–8 summer–fall summer 2'h 1'h H H H SS SS Geranium Geranium phaeum Gladiolus communis ssp. byzantinus ‘Sue Crug’ ‘Springtime’ Variegated mourning Cranesbill widow Gladiolus Garden origin Europe, W. Russia Mediterranean Geraniaceae Geraniaceae Iridaceae Perennial Perennial Naturalizing bulb Z 4–8 Z 4–9 Z 6–10 summer spring spring–summer h h 2' 1'h 1' H H H H H H H SS SS S Geranium phaeum Geranium wlassovianum Hakonechloa macra Dusky cranesbill Wlassov’s cranesbill Japanese forest grass South and East Europe East Asia Japan Geraniaceae Geraniaceae Poaceae Perennial Perennial Grass Z 5–7 Z 5–8 Z 5–9 spring–summer summer summer–autumn 1'h 1'h 3'h H H H H H H SS SS SS Geranium phaeum Geranium x oxonianum Helenium ‘Album’ ‘Claridge Druce’ ‘Rubinzwerg’ Cranesbill Europe, Cranesbill Helen’s flower Western Russia Garden origin Garden origin Geraniaceae Geraniaceae Asteraceae Perennial Perennial Perennial Z 5–8 Z 4–8 Z 3–7 spring summer summer 1'h 1'h 2'h H H H H H H H SS S SS Helenium Heuchera Hosta (sieboldiana group) ‘Dancing Flames Flammenspiel’ ‘Frosted Violet’ ‘Blue Angel’ Hairy alumroot Plantain lily Garden origin Garden origin Saxifragaceae Hostaceae Perennial Perennial Z 4–8 Z 3–9 summer–fall ??????????? 2'h 3'h H H S S Helenium autumnale Heuchera villosa Hosta ‘Rotgold’ ‘Autumn Bride’ ‘Halcyon’ Helen’s flower Hairy alumroot Plantain lily North America SE United States Garden origin Asteraceae Saxifragaceae Hostaceae Perennial Perennial Perennial Z 3–8 Z 5–9 Z 3–9 summer–fall fall summer 4'h 2'h 2'h H H H H S S S Helleborus x hybridus Heuchera villosa Hosta ‘Caramel’ ‘Maraschino Cherry’ Lenten rose Hairy alumroot Plaintain lily Garden origin SE United States Garden origin Ranunculaceae Saxifragaceae Hostaceae Perennial Perennial Perennial Z 4–9 Z 4–8 Z 3–8 spring summer summer 1'h 1'h 3'h H H H H H SS S S Hosta Hyacinthus Iris germanica ‘Valentine Lace’ ‘Festival White’ ‘Depth of Field’ Plaintain lily Hyacinth Bearded iris Garden origin Garden origin Mediterranean Hostaceae Hyacinthaceae Iridaceae Perennial Naturalizing bulb ???????? Z 3–8 Z 4–8 Z 3–9 summer spring spring h h h H1' H1' H H2' H H S SS S Hyacinthus Hydrangea paniculata Jeffersonia diphylla ‘Festival Blue’ ‘Kyushu’ Hyacinth Panicle hydrangea Twinleaf Garden origin China, Japan Eastern N.