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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