Perennials

Acanthus hungaricus

Bear's Breeches

Size : 4-5"

Hardiness :

Growth Habit : Tall spikes.

Deeply cut, dark green leaves. Hardier than others. White or pink flowers.

Acanthus mollis 'Latifolius'

Bear's Breeches

Size : 5-6'

Hardiness :

Growth Habit : Arching leaves.

Glossy leaves. Great focal point. Pink flowers resemble Foxglove.

Achillea ageratifolia

Yarrow

Size : 6-10"

Hardiness : Zone 3

Growth Habit : Upright.

White flowers with bright silver foliage. Drought tolerant with a long blooming period.

Achillea 'Anthea'

Yarrow

Size : 2-3'

Hardiness : Zone 3

Growth Habit : Sturdy clumps of foliage.

Soft yellow flowers with silver foliage. Attracts butterflies. Drought tolerant with a long blooming period.

Achillea 'Coronation Gold'

Yarrow

Size : 36-40"

Hardiness : Zones 3-8

Growth Habit : Upright.

Bears tiny yellow flowerheads 4" across mid-summer to early autumn. Deadhead to encourage new flowers. Evergreen, oblong silvery gray, fern-like leaves. Drought tolerant with a long blooming period.

Achillea 'King Edward'

Yarrow

Size : 8"

Hardiness : Zone 3

Growth Habit : Woolly foliage forming 2" tall carpet.

Pale yellow flowers. Drought tolerant with a long blooming period.

Achillea millefolium 'Weser River Sandstone'

Yarrow

Size : Up to 3'

Hardiness : Zones 3-8

Growth Habit : Upright.

Deep rose-pink, flat-topped corymbs fade to a lovely buff color. Drought tolerant with a long blooming period.

Achillea millefolium 'Fireland'

Yarrow

Size : 24"

Hardiness : Zone 4

Growth Habit : Mat-forming, lacy foliage.

Bright red flower clusters fading to creamy yellow in early summer. Drought tolerant with a long blooming period.

Achillea millefolium 'Red Beauty'

Yarrow

Size : 2'

Hardiness :

Growth Habit : Upright.

Cerise-red flowers with lacy green foliage. Drought tolerant with a long blooming period.

Achillea sibirica 'Stephanie Cohen'

Yarrow

Size : 18"

Hardiness :

Growth Habit : Upright.

Soft pink flowers with bold green foliage. Drought tolerant with a long blooming period.

Achillea 'Terra Cotta'

Yarrow

Size : 2-3'

Hardiness :

Growth Habit : Upright.

Dark pink to brown flowers. Perfect blend with hot colored flowers. Drought tolerant with a long blooming period.

Achillea 'Walther Funcke'

Yarrow

Size : 2'

Hardiness : Zones 3-8

Growth Habit : Upright.

Bright orange-red flowers from June - September. Drought tolerant with a long blooming period.

Achillea x kellereri

Yarrow

Size : Approximately 6"

Hardiness : Zone 6

Growth Habit : Low mounding plant.

Silvery foliage with white flowers, finely cut. Excellent for a rock garden. Drought tolerant with a long blooming period.

Regarding all Aconitum: Roots, leaves, and seeds are poisonous.

Aconitum cammarum 'Bi-Color'

Monkshood

Size : Up to 4'

Hardiness : Zones 3-7

Growth Habit : Erect.

Blue and white flowers 1.5" across on arching branches. Glossy, dark green leaves. If using Monkshood in full sun, make sure soil retains moisture.

Aconitum cammarum 'Bressingham Sprire'

Monkshood

Size : 3'

Hardiness :

Growth Habit : Sturdy spikes.

Violet-blue flowers. Monkshood makes a great vertical accent for shade gardens.

Aconitum cammarum 'Eleanor'

Monkshood

Size : Up to 40"

Hardiness : Zone 3

Growth Habit : Compact.

Blooms appear white with blue edge, June-August.

Aconitum cammarum 'Stainless Steel'

Monkshood

Size : 40"

Hardiness : Zones 3-6

Growth Habit : Upright.

Bears beautiful metallic blue flowers June - August. Gray-green foliage.

Aconitum carmichaelii (fischeri)

Monkshood

Size : 4'

Hardiness :

Growth Habit : Upright.

Light blue flowers on sturdy stems. Later flowering than other species, great color when others have finished.

Aconitum carmichaelii 'Arendsii'

Monkshood

Size : 4'

Hardiness :

Growth Habit : Upright.

Dark violet flowers.

Aconitum carmichaelii 'Barker'

Monkshood

Size : 5-6'

Hardiness : Zone 3

Growth Habit : 5' spikes.

Deep violet flowers.

Aconitum carmichaelii ‘Pink Sensation'

Monkshood

Size: 3-4'

Hardiness: Zones 4-7
Growth Habit: Upright form.

A beautiful, long-lasting perennial, flowering from summer into autumn. A sturdy plant with leathery, dissected leaves and pale pink, hooded flowers. Anemone, Campanula, and Leucanthemum make nice companions.

Aconitum henryi 'Spark'

Yarrow

Size : 4'

Hardiness :

Growth Habit : Upright.

Dark violet-blue flowers.

Aconitum napellus

Monkshood

Size : 4-5'

Hardiness : Zones 5-8

Growth Habit : Erect.

Bears dense indigo-blue flowers in mid and late summer. Dark green leaves.

Aconitum napellus 'Rubellum'

Yarrow

Size : 40"

Hardiness :

Growth Habit : Tall, upright.

Pale violet flowers.

Aconitum sept. 'Ivorine'

Monkshood

Size : 36"

Hardiness : Zones 5-8

Growth Habit : Upright and bushy.

Bears cream-white pyramids of hooded florets earlier than other Monkshood.

Acontitum x cammarum ‘Eleanor'

Monkshood

Size : Up to 40"

Hardiness: Zones 4-7
Growth Habit : Compact.

Blooms appear white with blue edge, June-August. This is an improved bi-color with a more compact habit.

Aegopodium podograia ‘Variegata'

Variegated Bishop's Weed, Goutweed

Size: 10-15"

Hardiness: Zone 4
Growth Habit: Vigorous groundcover, toothed leaves.

Useful, rugged, and robust groundcover with green foliage and creamy, white margins. White flowers in early summer. Grows almost anywhere. Good groundcover for difficult areas. European.

Aethionema cordifolium

Lebanon Stonecress

Size : Approximately 8"

Hardiness :

Growth Habit : Low mounding plant.

Needle-like blue/green foliage. Small pink/red flowers.

Aethionema kotschyi

Stone Cress

Size : Up to 4"

Hardiness :

Growth Habit : Compact evergreen to semi-evergreen.

Pink flowers, great for rock garden.

Aethionema schistosum

Persian Stonecrop

Size : Approximately 4"

Hardiness :

Growth Habit : Linear habit.

Blue/gray leaves, dark pink flowers bloom from terminal racmes.

Agastache ‘Fragrant Delight'

Anise Hyssop

Size: 36-42”

Hardiness: Zones 6-9

Growth Habit: Bushy, narrow, and upright.

Tall, pale blue, very fragrant flower spikes.

Agastache cana ‘Sonoran Sunset'

Anise Hyssop

Size: 15”

Hardiness: Zones 5-9
Growth Habit: Compact.

Showy, fragrant, lavender-rose flowers over compact plants.

Agastache rupestris ‘Apache'

Anise Hyssop

Size: 18-24”

Hardiness:
Growth Habit: Funnel-shaped blooms.

Smoky, fine-leaved, gray foliage with small, orange-red to apricot blooms with purple calyces. Licorice scented foliage. Has a long bloom period.

Ajuga 'Chocolate Chip'

Bugleweed

Size : 2-4"

Hardiness : Zones 3-9

Growth Habit : Clump-forming groundcover.

Mini chocolate brown foliage with stunning blue flowers in spring. A beautiful Italian import. Easy to grow!!

Ajuga pyramidalis 'Green Crispa'

Bugleweed

Size : 8-10"

Hardiness :

Growth Habit : Clump-forming.

Clear blue flowers with deep green foliage.

Ajuga reptans 'Bronze Beauty'

Bugleweed

Size : 4-8"

Hardiness : Zones 3-9

Growth Habit : Clump-forming.

Blue flowers over attractive bronze foliage in spring.

Ajuga reptans 'Catlins Giant'

Bugleweed

Size : 10"

Hardiness :

Growth Habit : Fast growth rate.

Leaves are larger than other varieties. Blue flowers with variegated foliage.

Alcea rosea plena 'Chater's Violet'

Hollyhock

Size : 6' Stems

Hardiness : Zone 3

Growth Habit : Upright.

Cut spent flower stalks. May be necessary to stake in windy areas. Double violet flowers on violet stems June to late August.

Alchemilla glaucescens (Pubescens)

Lady's Mantle

Size : Up to 12"

Hardiness : Zone 4

Growth Habit : Round leaves.

Green flowers late spring to summer.

Alchemilla mollis

Lady's Mantle

Size : 18"

Hardiness :

Growth Habit : Mounding habit. Hexagonal leaves.

Good for cutting and drying. Water beads up on leaves, creating a beautiful picture. Yellow flowers with gray-green leaves.

Allium cyaneum

Chives

Size: Approximately 6"

Hardiness: Zone 5
Growth Habit: Upright, bushy clump.

Thready, tuft-like foliage. Clustering flowers. Cobalt blue flowers with green foliage. Great with grasses.

Allium flavum

Chives

Size : 6-8"

Hardiness : Zone 5

Growth Habit : Tufted foliage, dangling flower.

Yellow flower, green foliage. Great with grasses.

Allium 'Mt. Sinai'

Chives

Size : 12-14"

Hardiness :

Growth Habit : Upright, long blooming.

Lavender-purple flowers. Great with grasses.

Allium maximowiczii ‘Album'

Dwarf Flowering Onion

Size: 3-8”

Hardiness: Zone 3
Growth Habit: Clump-forming.

Clumps of delicate, bluish foliage that produce little, white pom-poms that last quite a while in early spring. Quick to increase in clump size.

Allium senescens 'Glaucum'

German Garlic 'Glaucum'

Size : 8-10"

Hardiness : Zone 3

Growth Habit : Curly, fleshy, leaves.

Attracts hummingbirds and butterflies. Mauve flowers. Great with grasses.

Allium splendens

Chives

Size: 18-24”

Hardiness: Zone 3
Growth Habit: Compact, clump-forming.

Forms clumps of slender leaves and wiry stems bearing large, rounded clusters of rich, rose-purple blooms. Excellent amongst grasses.

Allium thunberbii var. Ozawa

Chives

Size : 12"

Hardiness :

Growth Habit : Upright.

Purple flowers and green foliage. Excellent late season colors, mixes well with grasses.

Allium virgunculae

Splendens

Size : Approximately 6"

Hardiness :

Growth Habit : Fine chives.

Dark purple flowers. Choice plant. Great with grasses.

Alstroemeria 'Sweet Laura'

Peruvian Lily

Size : Up to 30"

Hardiness : Zones 6-9

Growth Habit : Vigorous and heavy blooming.

Very delicate scent, blooming June-Sept. One of the best and hardiest of the patented varieties. Yellow flowers are spotted and brushed mahogany-red.

Amsonia 'Blue Ice'

Thread-leaf Blue Star

Size : 12-15"

Hardiness : Zones 5-9

Growth Habit : Long-blooming, compact. Forms a dense mound.

Dark blue buds and flowers. Mound is dark green leaves that turn brilliant yellow in fall.

DR N

Amsonia hubrectii

Blue Milkweed

Size : 4-5'

Hardiness :

Growth Habit : Upright, bushy and billowy habit. Star-like flowers sit on tips.

Blue flowers, nice fall color.

Amsonia tabernaemontana var. salicifolia

Blue Milkweed

Size : 18-24"

Hardiness :

Growth Habit : Upright.

Sky blue flowers, nice fall color.

Anacyclus depressus

Mt. Atlas Daisy

Size : 4-6"

Hardiness :

Growth Habit : Mat-forming.

Needs good drainage. White daisy flowers with purple backs.

Anchusa azurea (Italica)

Alkanet

Size : 30" Spikes

Hardiness :

Growth Habit : Upright.

Needs good drainage. Brilliant, sky blue florets.

Anemone canadensis

Meadow Anemone

Size : 12-18"

Hardiness : Zones 4 - 8

Growth Habit : Spreading, easy to grow.

Clear white single flowers from mid spring to early summer. A strong growing plant that needs room to move. Robust and competitive plant brightens up woodland edges.

Anemone hupehensis 'September Charm'

Windflower

Size : 3'

Hardiness : Zone 5

Growth Habit : Upright.

Plant in masses or in a border. Dark pink flower outside, light pink on the inside.

Anemone tomentosa 'Robustissima'

Windflower

Size : 3'

Hardiness :

Growth Habit : Upright.

Pink flowers.

Anemone x 'Hadspen Abundance'

Windflower

Size : 18-24"

Hardiness : Zone 6-9

Growth Habit : Upright. Very free flowering.

Flowers late summer to early fall. Deep pink single to semi-double flowers.

Anemone x hybrida 'Honorine Jobert'

Windflower

Size : 3-4'

Hardiness :

Growth Habit : Upright.

Clear white flowers.

Anemone x hybrida 'Kriemhilde'

Windflower

Size : 3'

Hardiness : Zone 5

Growth Habit : Upright.

Semi-double pale purple-pink flowers.

Anemone x hybrida 'Pamina'

Windflower

Size : 3-4'

Hardiness : Zone 5

Growth Habit : Upright.

Double red-rose flowers. Rich hummus soil.

Anemone x hybrida 'Serenade'

Windflower

Size : 40"

Hardiness : Zones 6-9

Growth Habit : Erect.

Flowering period Aug-Sept. Double, dark-pink flowers.

Anemone x hybrida 'Whirlwind'

Windflower

Size : 3'

Hardiness :

Growth Habit : Upright.

Double white flowers.

Anemone x 'Lesseri'

Windflower

Size : 16"

Hardiness : Zone 6-9

Growth Habit : Erect.

Flowering period is May - June. Lovely rose-pink flowers over finely serrated basal foliage.

Angelica pachycarpa

Archangel

Size : 2'

Hardiness :

Growth Habit : Mounded.

Fragrant white flowers with glossy green foliage.

Angelica 'Vicars Mead'

Archangel

Size : Up to 6'

Hardiness : Zones 5-9

Growth Habit : Coarse leaves.

Plant will be longer lived if flowers are removed after they bloom. Very architectural. Moist soil. Maroon foliage and stalks. White flower umbels.

Anthemis ‘Susanna Mitchell'

Chamomile

Size: 20-24”

Hardiness: Zones 3-7
Growth Habit: Upright, open habit. Good to weave among other perennials.

Creamy, white flowers above a fern-like, silvery foliage. Prefers well-drained soil.

Anthemis carpatica 'Snow Carpet'

Marguerite

Size : 6"

Hardiness : Zone 4

Growth Habit : Cushion forming. Hairy leaves.

White flowers in spring. Green-gray leaves.

Anthemis tinctoria ‘Kelwayi'

Golden Marguerite

Size : 20-24"

Hardiness:
Growth Habit : Upright, clump-forming.

Gold daisies over ferny, scented foliage. Flowers profusely June-July. Tough, durable plant for hot, sunny, or sandy spots . Drought resistant and easy to grow!

Anthemis x hybrida 'E.C. Buxton'

Marguerite

Size : 20-24"

Hardiness : Zone 4

Growth Habit : Upright.

Lemon-yellow flowerheads.

Anthemis x hybrida 'Kelwayi'

Marguerite

Size : 20-24"

Hardiness :

Growth Habit : Upright.

Gold daisies over ferny, scented foliage. Drought resistant, durable, and easy to grow!

Anthemis x hybrida 'Wargrave'

Marguerite

Size : Up to 36"

Hardiness : Zones 3-8

Growth Habit : Erect.

Light creamy yellow daisies. Blooms all summer. Great drought resistance, easy to grow!

Aquilegia ‘Mellow Yellow'

Columbine

Size: 1-2'

Hardiness: Zone 4
Growth Habit: Reproduces easily by seed.

Unusual, golden foliage with white flowers shaded the palest milky-blue.

Aquilegia alpina

Columbine

Size : 1' Stems

Hardiness :

Growth Habit : Upright.

Violet-blue nodding flowers. Very sweet!

Aquilegia caerulea 'Kristall'

Columbine

Size : 24-30"

Hardiness : Zone 4

Growth Habit : Upright.

Pure white nodding flowers.

Aquilegia caerulea 'Red Hobit'

Columbine

Size : 12-15"

Hardiness : Zone 4

Growth Habit : Upright, compact habit.

Carmen-red, long spurred blooms with white corollas.

Aquilegia caerulea 'Rocky Mountain'

Columbine

Size : 3-4'

Hardiness : Zone 4

Growth Habit : Upright.

Violet purple flowers in May-June.

Aquilegia caerulea 'Rose Queen'

Columbine

Size : 24-30"

Hardiness : Zone 4

Growth Habit : Upright.

Blooms in June and July. Pink flower with white corolla.

Aquilegia canadensis

Wild Columbine

Size : 2-3'

Hardiness : Zones 3-8

Growth Habit : Clump-forming.

Beautiful flowers are scarlet red and yellow with bright red spurs. Flowering period is April-May. Leaves have long stems and are lobed. One of the nicest wildflowers.