Perennials hardy to -40F / -40C (USDA Zone 3)

• Achillea millefolium common yarrow
• Achillea tomentosa woolly yarrow
• Adiantum pedatum maidenhair fern
• Ajuga reptans bugleweed
• Amsonia tabernaemontana bluestar or willow herb
• Anaphalis margaritacea pearly everlasting
• Andropogon gerardii big bluestem
• Aquilegia caerulea Rocky Mtn columbine
• Aquilegia canadensis Canadian columbine
• Arenaria verna Irish moss
• Artemisia frigida fringed sage
• Artemisia ludoviciana white sage
• Artemisia stelleraria beach wormwood
• Aruncus dioicus goatsbeard
• Asclepias incarnata swamp milkweed
• Asclepias tuberosa butterfly weed
• Aster alpinus alpine aster
• Aster linariifolius stiff-leaved aster
• Aster novae-angliae New England aster, Michaelmas daisy
• Athyrium nipponicum Japanese painted fern
• Baptisia australis blue indigo
• Bergenia cordifolia
• Bergenia crassifolia
• Bergenia purpurascens
• Campanula glomerata
• Carex grayi Gray's sedge
• Celastrus scandens American bittersweet
• Chelone glabra, lyonii turtlehead
• Chrysanthemum leucanthemum ox-eye daisy
• Chrysopsis villosa golden aster
• Cimicifuga racemosa black cohosh, black snakeroot
• Clematis integrifolia
• Coreopsis lanceolata lance-leaved coreopsis
• Coreopsis verticillata thread-leaved coreopsis
• Delphinium (beladonna hybrids from D. elatum X D. grandiflorum)
• Dicentra eximia fringed bleeding heart
• Dicentra spectabilis common bleeding heart
• Dictamnus albus gas plant
• Echinacea angustifolia purple coneflower
• Echinops ritro globe thistle
• Eryngium amethystinum sea holly
• Eupatorium purpureum Joe-Pye weed
• Filipendula palmata Siberian meadowsweet
• Filipendula rubra Queen of the Prairie
• Filipendula ulmaria Queen of the Meadow
• Gaillardia X grandiflora
• Helenium autumnale sneezeweed
• Hemerocallis fulva tawny (common) daylily
• Hemerocallis lilio-asphodelus lemon daylily
• Heuchera sanguinea coral bells
• Hosta species
• Iris cristata dwarf crested iris
• Iris versicolor blue flag
• Lathyrus maritimus sea pea
• Lobelia cardinalis cardinal flower
• Lonicera sempervirens trumpet honeysuckle
• Lupinus argenteus silvery lupine
• Lupinus polyphyllus (Russell hybrids)
• Mertensia virginica Virginia bluebells
• Monarda fistulosa bergamot
• Nepeta mussinii catmint
• Opuntia polycanta plains prickly pear
• Osmunda regalis royal fern
• Paeonia lactiflora Chinese peony
• Paeonia officinalis common peony
• Parthenocissus quinquefolia Virginia creeper
• Penstemon digitalis white beardtongue
• Penstemon gracilis slender beardtongue
• Penstemon grandiflorus large-flowered beardtongue
• Phlox carolina Carolina phlox
• Phlox divaricata woodland phlox
• Phlox glaberrima smooth phlox
• Phlox pilosa prairie or downy phlox
• Polystichum acrostichoides Christmas fern
• Potentilla tridentata 3-toothed cinquefoil
• Pulmonaria saccharata Bethlehem sage or lungwort
• Rudbeckia hirta brown-eyed susan or gloriosa daisy
• Rudbeckia laciniata cutleaf coneflower
• Rudbeckia nitida e.g.Herbstsonne, Goldquelle
• Salvia pratensis meadow clary
• Schizachyrium scoparium little bluestem
• Sedum acre goldmoss stonecrop
• Sedum spectabile showy sedum e.g. Autumn Glow
• Sedum spurium 2-row stonecrop
• Silphium laciniatum compass plant
• Smilacina racemosa false solomon's seal
• Solidago missouriensis prairie goldenrod
• Solidago mollis soft goldenrod
• Solidago sempervirens seaside goldenrod
• Sorghastrum nutans Indian nut grass
• Thalictrum alpinum alpine meadowrue
• Thalictrum minus low meadowrue
• Veronica incana woolly speedwell
• Viola canadensis Canada violet
• Viola pubescens downy yellow violet
• Viola sororia confederate violet
• Yucca glauca yucca or spanish bayonet