Lilium martagon 'Fred Tarlton'

Lilium martagon 'Sweet Betsy'

Townsendia exscapa

Townsendia hookeri

Townsendia incana

Townsendia montana

Townsendia rothrockii

Townsendia sp.

Townsendia spatulatha

Tradescantia

Tradescantia 'Bilberry Ice'

Trollius chinensis 'Golden Queen'

Trollius pumilus

Trollius x cultorum 'Lemon Queen'

Trollius x cultorum 'New Moon'™

Trollius x cultorum 'Orange Crest'

Tulipa tarda

Ulmus americana

Ulmus americana 'Patmore'

Vaccinium corymbosum 'Northland'

Vaccinium 'Northblue'

Valeriana supina

Verbascum spp.

Veronica 'Wizard of AHHS'

Veronica 'Pink Potion'

Veronica prostrata

Veronica 'Purpleicious'

Veronica spicata

Veronica spicata 'Red Fox'

Veronica spicata 'Sunny Border Blue'

Veronica 'White Wands' Hybrid

Veronica whitleyi

Veronicastrum virginicum

Veronicastrum virginicum 'Fascination'

Viburnum opulus

Viburnum x rhytidophylloides 'Redell'

Vinca minor

Vinca minor 'Atropurpurea'

Vinca minor 'Evelyn'

Vinca minor 'Illumination'

Vitacella 'Huldine'

Vitaliana primuliflora

Vitus 'Valiant'

Weigela florida 'Centennial'

Weigela florida 'Minuet'

Weigela florida 'Red Prince'

Weigela spp.

Wisteria macrostachya 'Blue Moon'

Yucca glauca

Zizia aptera

Solidago 'Crown of Rays'

Solidago missouriensis

Solidago rigida

Solidago spp.

Sorbaria Sem

Sorbaria sorbifolia 'Levgreen'

Sorbaria sorbifolia 'Sem'

Sorbus americana

Sorbus aucuparia

Sorbus aucuparia 'Rossica'

Spiraea betulifolia 'Tor Gold'

Spiraea japonica 'Goldmound'

Spiraea japonica 'Little Princess'

Spiraea japonica 'Little Princess'

Spiraea japonica 'Matgold'

Spiraea japonica 'Shirobana'

Spiraea japonica 'SMNSJMFR'

Spiraea nipponica 'Snowmound'

Spiraea prunifolia

Spiraea trilobata

Spiraea x bumalda 'Denistar'

Spiraea x bumalda 'Goldflame'Spiraea japonica 'Goldflame'

Spiraea x vanhouttei 'Renaissance'

Sporobulus heterolepis

Stachys macrantha

Stachys spathulata

Streptopus amplexifolius

Symphicarpos albus

Syringa palibiniana

Syringa patula 'Miss Kim'

Syringa reticulata 'Ivory Silk'

Syringa vulgaris

Syringa vulgaris 'Charles Joly'

Syringa vulgaris 'Madame Lemoine'

Syringa vulgaris 'Sensation'

Syringa vulgaris 'Wedgewood Blue'

Syringa x 'Bailbelle'

Syringa x 'Penda'

Syringa x prestoniae

Syringa x prestoniae 'James McFarlane'

Tanacetum coccineum

Taxus cuspidata 'Morden'

Taxus x media 'Hicksii'

Taxus x media 'Hillii'

Telesonix jamesii

Thalictrum delavayi 'Hewitt's Double'

Thalictrum rochebruneanum

Thlaspi minimum

Thymus serpyllum

Tiarella 'Spring Symphony'

Salvia 'Pink Dawn'

Salvia spp.

Salvia sylvestris 'Caradonna'

Salvia sylvestris 'May Night'

Salvia x superba Merleau TM

Salvia x sylvestris 'Blue Queen'

Sambucus canadensis 'Aurea'

Sambucus nigra 'Eva'

Sambucus nigra 'Gerda'

Sambucus racemosa

Sambucus racemosa 'Sutherland'

Saponaria ocymoides

Saxifraga cf porophyllum

Saxifraga crustata

Saxifraga juniperifolia

Saxifraga paniculata

Saxifraga sp.

Saxifraga sp. (early)

Saxifraga x cochlearifolia

Scabiosa columbaria Flutter TM Deep Blue

Scabiosa japonica

Scabiosa spp.

Schizachne purpurascens

Schizachyrium scoparium

Scilla siberica 'Spring Beauty'

Scutellaria alpina

Sedum 'Autumn Joy'

Sedum 'Cherry Tart'

Sedum kamtschaticum 'Variegatum'™

Sedum 'Peach Pearls'

Sedum 'Purple Emperor'

Sedum reflexum 'Blue Spruce'

Sedum spp.

Sedum spurium 'Dragon's Blood'

Sedum telephium 'Chocolate Drop'

Sedum 'Xenox'

Sempervivum spp.

Sheperdia canadensis

Shepherdia argentea

Shepherdia canadensis

Sidalcea 'Brilliant'

Silene acaulis

Silene davidii

Silene dinarica

Silene etarium?

Silene hookeri

Silene suecica

Silene uniflora 'Compacta'

Sisyrinchium montanum

Solidago canadensis 'Baby Gold'

Rosa x 'Empowerment'

Rosa x 'Fragrant Spreader'

Rosa x 'Hope for Humanity'

Rosa x 'Hot Paprika'

Rosa x 'J.P. Connell'

Rosa x 'John Franklin'

Rosa x 'Lambert Closse'

Rosa x 'Lemon Zest'

Rosa x 'Marmalade Dream'

Rosa x 'Morden Amorette'

Rosa x 'Morden Belle'

Rosa x 'Morden Blush'

Rosa x 'Morden Cardinette'

Rosa x 'Morden Centennial'

Rosa x 'Morden Fireglow'

Rosa x 'Morden Ruby'

Rosa x 'Morden Snowbeauty'

Rosa x 'Morden Sunrise'

Rosa x 'Never Alone'

Rosa x 'Nicolas'

Rosa x 'Olds College'

Rosa x 'Oscar Peterson'

Rosa x 'Peach Lemonade'

Rosa x 'Peachy Cream'

Rosa x 'Pink Grootendorst'

Rosa x 'Polarstar'

Rosa x 'Prairie Celebration'

Rosa x 'Prairie Dawn'

Rosa x 'Prairie Joy'

Rosa x 'Prairie Peace'

Rosa x 'Prairie Princess'

Rosa x 'Prairie Snowdrift'

Rosa x 'Red Drift'

Rosa x 'Thérèse Bugnet'

Rosa x 'Winnipeg Parks'

Rubus idaeus 'Boyne'

Rubus idaeus 'Prelude'

Rubus idaeus var. strigosus 'Fall Gold'

Rudbeckia fulgida 'Goldsturm'

Rudbeckia 'Gold Fountain'

Rudbeckia hirta

Rudbeckia fulgida var. sullivantii 'Goldstrum'

Salix commutata

Salix integra 'Hakuro-nishiki'

Salix sp. (dwarf)

Salvia 'Azure Snow'

Salvia nemorosa 'Bumblesnow'

Salvia nemorosa 'dark matter'

Salvia nemorosa 'New Dimension'

Salvia nermerosa 'Blue Queen'