Plants hardy in Zone 3 (hardy to -40°C or -40°F)
Adiantum pedatum (American Maidenhair Fern)
Ajuga reptans 'Burgundy' (Carpet Bugle)
Aquilegia formosa (Crimson Columbine)
Arabis ferdinandi-coburgi 'Variegata' (Alpine Wall Cress)
Arctostaphylos uva-ursi (Kinnikinnick)
Armeria maritima (Sea Thrift)
Armeria maritima 'Alba' (White-flowered Thrift)
Armeria maritima 'Rubrifolia' (Red-leaved Thrift)
Calluna vulgaris 'Corbett's Red' (Scotch Heather)
Calluna vulgaris 'County Wicklow' (Scotch Heather)
Calluna vulgaris 'Dark Beauty' (Scotch Heather)
Calluna vulgaris 'Dark Star' (Scotch Heather)
Calluna vulgaris 'Silver Knight' (Scotch Heather)
Calluna vulgaris 'White Coral' (Scotch Heather)
Cerastium tomentosum (Snow in Summer)
Cornus canadensis (Bunchberry)
Draba brunifolia (Whitlow Grass)
Dryopteris filix-mas 'Barnesii' (Barnes' Narrow Male Fern)
Dryopteris filix-mas 'Linearis Polydactyla'
Duchesnea indica 'Harlequin' (Mock Strawberry)
Festuca glauca 'Elijah Blue' (Blue Fescue)
Galium odoratum (Sweet Woodruff)
Gaultheria procumbens (Wintergreen)
Geranium sanguineum (Bloody Cranesbill)
Gymnocarpium dryopteris (Western Oak Fern)
Iris setosa 'Pristine Blue'
Pachysandra terminalis (Japanese Spurge)
Paxistima canbyi (Canby's Mountain Lover)
Polystichum munitum (Western Sword Fern)
Potentilla neumanniana 'Nana' (Alpine Cinquefoil)
Potentilla tridentata 'Nuuk' (Wineleaf Cinquefoil)
Sagina subulata (Irish Moss)
Sagina subulata 'Aurea' (Scotch Moss)
Saponaria ocymoides (Rock Soapwort)
Sedum acre 'Aureum' (Golden Stonecrop)
Sedum cauticola 'Lidakense' (Blue and Plum Stonecrop)
Sedum pachyclados
Sedum rupestre 'Angelina'
Sedum spurium 'John Creech' (John Creech Stonecrop)
Sempervivum (Hens & Chicks)
Sisyrinchium montanum (Strict Blue-Eyed Grass)
Thymus doerfleri 'Bressingham' (Bressingham Thyme)
Thymus praecox 'Albiflorus' (White Moss Thyme)
Thymus praecox 'Elfin' (Creeping Thyme)
Thymus pseudolanuginosus (Woolly Thyme)
Thymus serpyllum (Mother of Thyme)
Vaccinium ovalifolium (Oval Leaf Huckleberry)
Veronica liwanensis (Turkish Speedwell)
Veronica whitleyi (Whitley's Speedwell)
Vinca minor 'Atropurpurea' (Purple Periwinkle)
Vinca minor 'Ralph Shugert' (Variegated Periwinkle)
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