Achillea (Yarrow) - Excellent cut flower and summer flowering border plant. Heat and drought resistant plant that prefers full sun and well-drained conditions. Tolerates poor, slightly acid, dry soils. Deadheading extends flowering time.

• 'Coronation Gold' Zones 3-9
• millefolium 'Appleblossom' Zones 3-9
• millefolium 'Cerise Queen' Zones 3-9
• millefolium 'Paprika' Zones 3-9
• millefolium 'Pink Grapefruit' Zones 4-8
• millefolium 'Red Velvet' Zones 3-9
• millefolium 'Royal Tapestry' Zones 3-9
• 'Moonshine' Zones 3-8
• 'Summer Pastels' Zones 3-9
• 'Terracotta' Zones 3-9

Actaea (Bugbane) – The tall, airy plant produces bottlebrush spikes above loose clusters of compound leaves. Plants prefer moisture retentive, acidic soils and shady locations.

• racemosa Zones 3-8
• simplex 'Atropurpurea' Zones 3-8
• simplex 'Brunette' Zones 4-8
• simplex 'White Pearl' Zones 4-8

Adenophora (Lady Bells)

• 'Amethyst' Zones 3-7

Aegopodium (Bishop's Weed)

• podagraria 'Variegatum' (Variegated Bishop's Weed) Zones 3-8

Agastache (Anise Hyssop)

• 'Black Adder' Zones 5-9
• 'Blue Fortune' Zones 6-10
• rugosa 'Golden Jubilee' Zones 5-9
• rupestris (Rock Anise Hyssop) Zones 5-8

Ajania (Chrysanthemum)

• pacifica (Pacific Chrysanthemum) Zones 5-9

Ajuga (Bugle Weed)

• reptans 'Black Scallop' Zones 3-9
• reptans 'Bronze Beauty' Zones 3-9
• reptans 'Burgundy Glow' Zones 3-9
• reptans 'Silver Queen' Zones 3-9
• tenorii 'Chocolate Chip' Zones 3-9

Alcea (Hollyhock) – Stately, summer flowering plant reaching 6' tall.

• rosea 'Blacknight' Zones 2-8
• rosea Chater's Double Hybrids (Pink) Zones 2-8
• rosea Chater's Double Hybrids (Yellow) Zones 2-8
• rosea Chater's Double Hybrids (Scarlet) Zones 2-8
• rosea 'Crème de Cassis' Zones 3-9
• rosea 'Indian Spring' Zones 3-9
• rosea 'Nigra' Zones 2-8
• rosea 'Peaches 'n' Dreams' Zones 3-9

Alchemilla (Lady's Mantle) – Low growing plant for rock gardens or border. Grow in average soil. Delicate sprays can be dried.

• erythropoda Zones 3-7
• mollis 'Thriller' (CU Allstar) Zones 3-7

Alyssum (Madwort)

• montanum 'Mountain Gold' Zones 4-9

Amsonia (Blue Star)

• 'Blue Ice' Zones 5-9
• hubrichtii (threadleaf bluestar) Zones 4-9

Anemone (Windflower) – Most plants flower beginning in September to frost. Prefers rich, well-drained soil. Mulch during winter.

• hupehensis 'Prince Heinrich' Zones 4-8
• hupehensis 'September Charm' Zones 4-8
• sylvestris (Snowdrop Anemone) Zones 4-7
• tomentosa 'Robustissima' (Grapeleaf Anemone) Zones 4-8
• x hybrida 'Honorine Jobert) Zones 5-7
• x hybrida 'Pamina' Zones 5-7
• x hybrida 'Serenade' Zones 5-7
• x hybrida 'Whirlwind' Zones 5-7

Aquilegia (Columbine) – Spring or early summer flowers in a variety of colors. Prefers rich, well-drained soil in light to moderate shade. Good in borders and as a cut flower.

• 'Biedermeier' Zones 3-9
• canadensis Zones 3-8
• canadensis 'Little Lanterns' Zones 3-8
• flabellata (Cameo series mix) Zones 3-9
• x hybrida (Original mix) Zones 3-7
• McKana Hybrids Zones 3-9
• Musik Series Mix Zones 3-9
• vulgaris 'Winky Purple White' Zones 3-8
• vulgaris 'Winky Rose' Zones 3-8
• vulgaris Winky Series Mix Zones 3-8

Armeria (Sea Thrift)

• maritima 'Splendens' Zones 4-8

Artemisia (Wormwood) – Fragrant foliage when bruised. Planted for silvery foliage. Suitable for sunny areas and dry soils with low fertility.

• ludoviciana 'Silver King' Zones 3-9
• ludoviciana 'Valerie Finnis' Zones4-9
• 'Powis Castle' Zones 6-8
• stelleriana 'Silver Brocade' ('Boughton Silver' – Beach Wormwood) Zones 4-8

Aruncus (Goat's Beard) – Moist, shady locations preferred. Magnificent long plumes with attractive foliage.

• aethusifolius Zones 3-7
• dioicus Zones 3-7

Asarum (Wild Ginger) – This woodland ground cover spreads by rhizomes and prefers acidic soils with constant moisture and good drainage. Performs best in part to full shade.

• canadense (Canadian Ginger) Zones 3-7

Asclepias (Milkweed)

• incarnata (swamp milkweed) Zones 3-7
• tuberosa (Butterfly weed) Zones 4-9

Aster (Aster)

• novae-angliae (New England Aster) Zones 3-8
• novae-angliae 'Andenken an Alma Potschke' Zones 4-8
• novae-angliae 'Purple Dome' Zones 4-8
• novi-belgii (New York aster) Zones 4-8

Astible (False Spirea) – Plumy flower panicles and fern-like foliage. Requires rich, moist soil and appreciates protection from afternoon sun during the summer.

• 'Amethyst' Zones 4-8
• “Bridal Veil' Zones 4-8
• 'Cattleya' Zones 4-8
• chinensis 'Diamonds and Pearls' Zones 4-8
• chinensis 'Pumila' Zones 4-8
• chinensis 'Superba' Zones 4-8
• chinensis 'Visions' Zones 4-8
• chinensis 'Visions in Pink' Zones 4-8
• chinensis 'Visions in Red' Zones 4-8
• 'Deutschland' Zones 4-9
• 'Erika' Zones 4-9
• 'Fanal' Zones 4-9
• 'Glow' Zones 4-9
• 'Hennie Graafland' Zones 4-8
• 'Montgomery' Zones 4-8
• 'Ostrich Plume' Zones 4-8
• 'Peach Blossom' Zones 4-9
• 'Rheinland' Zones 4-9
• 'Sprite' Zones 4-9

Aurinia (Basket-of-Gold)

• saxatilis 'Compacta' Zones 3-7

Baptisia (False Indigo)

• australis Zones 3-8

Bergenia (Pigsqueak)

• 'Winter Glow' (Winterglod) Zones 4-8

Boltonia (Bolton's Aster)

• Jim Crockett ('Masbolimket' ) Zones 4-9

Brunnera (Brunnera)

• macrophylla (Heartleaf Brunnera) Zones 3-7
• macrophylla 'Jack Frost' Zones 3-7
• macrophylla 'Variegata' Zones 3-7

Calamintha (Calamint)

• grandiflora 'Variegata' Zones 4-9

Caltha

• palustris (Marsh Marigold) Zones 2-8

Campanula (Bellflower) – Prefers well-drained, rich soil. Not very tolerant of hot, dry conditions.

• carpatica 'Blue Clips' ('Blaue Clips) Zones 3-7
• carpatica 'White Clips' Zones 3-7
• carpatica 'Pearl Blue' Zones 3-7
• carpatica 'Pearl White' Zones 3-7
• glomerata 'Superba' Zones 3-8
• persicifolia Zones 3-8
• persicifolia 'Alba' Zones 3-7
• persicifolia 'Telham Beauty' Zones 3-7
• poscharskyana 'Camgood' (Blue Waterfall) Zones 4-7

Centaurea (Cornflower) – Grows best in full sun with well-drained soil. Drought tolerant.

• dealbata 'Rosea' (Persian Cornflower) Zones 3-7
• montana (Mountain Bluet) Zones 3-8
• montana ' Amethyst in Snow' Zones 3-8

Centranthus (Jupiter's Beard) Grow in alkaline soils in full sun. Tolerant of dry, infertile conditions.

• ruber 'Coccineus' Zones 5-8

Ceratostigma (Leadwort)

• plumbaginoides (CU Allstar) Zones 5-8

Chelone (Turtlehead)

• lyonii 'Hot Lips' (Pink Turtlehead) Zones 3-8

Convallaria (Lily of the valley)

• majalis Zones 2-7

Coreopsis (Tickseed) – Plant in full sun and provide well-drained conditions.

• auriculata 'Zamphir' Zones 4-9
• 'Fill Moon' Zones 4-8
• grandiflora 'Baby Sun' Zones 4-9
• grandiflora 'Sunray' Zones 4-9
• 'Limerock Ruby' Zones 7-9
• rosea 'American Dream' Zones 4-7
• rosea 'Sweet Dreams' Zones 4-7
• verticillata 'Moonbeam' Zones 5-9
• verticillata 'Zagreb' Zones 5-9

Crocosmia (Montbretia) – Sword-like foliage arise from a corm. Flowers resembling small funnels appear in rows along flowering stem. Great cut flower.

• 'Emily McKenzie' Zones 5-8
• 'George Davidson' Zones 5-9
• 'Lucifer' Zones 5-8

Delosperma (Ice Plant)

• floribundum 'Starburst' Zones 5

Delphinium (Delphinium) – Grown for their showy flower panicles. Larger types may require staking to hold the flower stalks. Prefers moist, well-drained, rich soil for best performance.

• 'Connecticut Yankee' Zones 3-7
• 'Magic Fountains' Zones 3-7
• 'Summer Blues' Zones 4-7
• 'Summer Nights' Zones 3-7

Dianthus (Pinks)

• barbatus 'Indian Carpet' ('Indian Teppich') (Sweet William) Zones 3-8
• 'Brilliant Star' Zones 5-9
• deltoides 'Artic Fire' Zones 3-9
• Eastern Star ('Red Dwarf') Zones 5-9
• gratianoplitanus 'Bath's Pink' Zones 3-9
• gratianoplitanus 'Firewitch' ('Feuerhexe') Zones 3-9
• gratianoplitanus 'Tiny Rubies' Zones 3-9
• 'Pixie Star' (Pinks) Zones 5-9
• Raspberry Swirl ('Devon Siskin') Zones 5-9
• 'Spangled Star' Zones 5-9
• Starlette Zones 4-9

Dicentra (Bleeding Heart) – Popular plant for the shaded garden. Prefers rich, moist soil.

• formosa 'Aurora' Zones 3-9
• 'King of Hearts' Zones 5-9
• spectabilis 'Alba' Zones 3-9
• spectabilis 'Gold Heart' Zones 4-8

Digitalis (Foxglove)

• Camelot Series Zones 4-8
• 'Mertonensis' (Strawberry Foxglove) Zones 3-8
• purpurea 'Alba' (Common Foxglove) Zones 4-8

Echinacea (Purple Coneflower)

• Big Sky Sundown ('Evan Saul') Zones 4-9
• Big Sky sunrise ('Sunrise')
• Harvest Moon ('Mathew Saul') Zones 4-8
• purpurea 'Fatal Attraction' Zones 4-9
• purpurea 'Kim's Knee High' Zones 3-8
• purpurea 'Magnus' Zones 3-8
• purpurea 'Ruby Giant' Zones 3-8
• purpurea 'Ruby Star' Zones 3-8
• purpurea 'White Swan' Zones 3-8

Epimedium (Barrenwort) – Naturally occurs in light woodlands and light shade although tolerates heavy shade and completes well with tree roots. Prefers soil rich in organic matter with adequate drainage.

• x perralchicum 'Frohnleiten' Zones 6
• x rubrum Zones 5-8
• x versicolor 'Sulphureum' Zones 5-8
• x youngianum 'Niveum' Zones 5-8
• x youngianum 'Roseum' Zones 5-8

Eryngium (Sea Holly)

• planum 'Blaukappe' Zones 5-8

Eupatorium (Joe-Pye Weed)

• dubium 'Little Joe' Zones 3-9
• maculatum 'Gateway' Zones 3-8
• perfoliatum (American Boneset) Zones 3-8
• purpureum Zones 3-8
• rugosum 'Chocolate' Zones 3-7

Euphorbia

• polychroma 'Bonfire' (Cushion Spurge) Zones 5-9

Filipendula (Meadowsweet) – Leaves deeply lobed, similar to astilbe. Prefers moist soils, full sun to part-shade and slightly alkaline soil.

• ulmaria (Meadowsweet) Zones 3-7
• vulgaris 'Kahome' (dwarf) Zones 3-8

Gaillardia (Blanket Flower) – Popular group of plants that is easy to grow, weather tolerant, and has a long blooming season. Needs full sun, well-drained soil, and some removal of spent flowers for best results.

• 'Fanfare' Zones 4-8
• Gallo (Dark Bicolor) Zones 4-8
• Gallo (Orange) Zones 4-8
• Gallo (Peach) Zones 4-8
• 'Goblin' ('Kobold') Zones 2-9
• 'Oranges and Lemons' Zones 6-10

Galium (Sweet Woodruff) – An excellent groundcover for naturalizing in moist areas.

• Odoratum Zones 4-7

Gaultheria (Wintergreen)

• procumbens Zones 3-8

Gaura (Gaura)

lindheimeri 'Whirling Butterflies' Zones 5-8

• 'Passionate Rainbow' Zones 6-9

Gazania (Treasure Flower)

• linearis 'Colorado Gold' Zones 4-8

Geranium (Cranesbill)

• 'Blue Sunrise' Zones 4-8
• x cantabrigiense 'Biokovo' Zones 5-7
• x cantabrigiense 'Karmina' Zones 5-8
• endressii 'Wargrave Pink' Zones 4-7
• 'Johnson's Blue' Zones 4-8
• 'Jolly Bee' Zones 4-7
• maculatum Zones 4-8
• 'Rozanne' Zones 5-8
• sanguineum 'Max Frei' Zones 3-8
• sanguineum var striatum Zones 3-8

Gypsophilia (Baby's Breath)

• paniculata 'Bristol Fairy' Zones 3-7
• paniculata 'Pink Fairy' Zones 3-7

Helianthus (Sunflower)

• Lemon Queen' Zones 4-8

Heliopsis (False Sunflower)

• helianthoides 'Summer Sun' Zones 3-9

Helleborus (Hellebore)

• x hybridus (Lenten Rose) Zones 4-9

Hemerocallis (Daylily) – Thrive in full sun although tolerant of partial shade. Tough plants with long-lasting color. Divide in early spring or fall when necessary.

• 'Bonanza' Zones 3-9
• 'Bright Sunset' Zones 3-9
• 'Buttered Popcorn' Zones 3-9
• 'Catherine Woodbury' Zones 3-9
• 'Cedar Waxwing' Zones 3-9
• 'Eenie Weenie' Zones 3-9
• 'Frans Hals' Zones 3-9
• 'Going Bananas' Zones 3-9
• 'Happy Returns' Zones 3-9
• 'Hyperion' Zones 3-9
• 'Little Grapette' Zones 3-9
• Midnight Magic' Zones 3-9
• 'Mini Pearl' Zones 3-9
• 'Siloam Double Classic' Zones 3-9
• 'Siloam Uri Winniford' Zones 3-9
• 'Spellbinder' Zones 3-9
• Stella de Oro' Zones 3-9
• Strutte's Ball' Zones 3-9
• Sunday Gloves' Zones 3-9

Heuchera (Alumroot) – Mound-forming groundcovers. Requires good drainage and generally performs better under cooler conditions.

• 'Amethyst Mist' Zones 4-9
• 'Caramel' Zones 4-8
• 'Citronelle' Zones 4-9
• 'Frosted Violet' Zones 3-8
• 'Georgia Peach' Zones 4-9
• 'Palace Purple' Zones 4-9
• 'Mocha' Zones 4-9
• 'Obsidian' Zones 4-9
• 'Petite Pearl Fairy' Zones 4-9
• 'Plum Pudding' Zones 5-9
• 'Swirling Fantasy' Zones 4-9
• 'Autumn Bride' Zones 3-8

Heucherella (Foamy Bells)

• 'Stoplight' Zones 4-9
• 'Crimson Clouds' Zones 3-7

Hibiscus (Hibiscus)

• 'Lady Baltimore' Zones 5-9
• 'Blue River' Zones 5-9
• 'Lord Baltimore' Zones 5-9
• 'Plum Crazy' Zones 4-9
• 'Fantasia' Zones 4-9