Achillea 'Coronation Gold' is an award-winning yarrow with masses of flat-topped, golden yellow flowers.

Achillea 'Apricot Delight' has large, flat-topped flower clusters in various shades of pink atop fern-like foliage.

Achillea millefolium 'New Vintage Rose' has large, flat-topped flower clusters of rose pink with white eyes.

Achillea millefolium 'New Vintage White' has large, flat-topped flower clusters of pure white eyes flowers.

Achillea 'Terracotta' is a distinctive yarrow offering shades of yellow, orange, and terra cotta.

Achillea millefolium, the common yarrow, is an important nectar source and host plant for a diversity of insects.

Achillea ptarmica 'Peter Cottontail' is a unique yarrow with white, button-like flowers held in low, cloud-like mounds.

Among the best of the blue Agastache, 'Black Adder' has blue flowers and deep purple blue bracts for a bicolour effect.

Agastache 'Guava Lava' is a hummingbird mint with coral-orange flowers and mauve-pink calyxes.

Agastache 'Mango Tango' is a compact, long-blooming hummingbird mint with dusky rose and peachy orange flowers.

Agastache 'Morello' is a dramatic hummingbird mint with huge, dense infloresences of deep burgundy rose flowers.

Agastache Meant to Bee 'Queen Nectarine' has soft peach flowers with mauve calyxes on tall three foot stems.

Agastache 'Royal Raspberry' is a long-blooming hummingbird mint with fragrant purple tubular flowers and aromatic foliage.

Agastache 'Tango' is a dwarf cultivar with big flower power in firey orange for containers or the front of the border.

Agastache cana Sonoran Sunset forms short, full, stocky plants to 16 inches tall and wide boasting masses of fragrant raspberry purple flowers atop fragrant foliage.

Agastache Coronado Red is a long-blooming hummingbird mint with brilliant, fiery, orange-red, tubular flowers from late spring until fall.

Agastache foeniculum is a long-blooming perennial great for summer colour and bees and butterflies.

Agastache rupestris has narrow, grey-green, root beer-scented foliage on bushy mounds topped by apricot-orange tubular flowers in summer.

Anaphalis margaritacea (pearly everlasting) has crisp white flowers attractive to butterflies and which are useful for drying.

Antennaria dioica 'Rubra', pink pussytoes, is small, cold hardy ground cover with silver leaves and fuzzy, pink flowers.

Antennaria plantaginifolia is a cold hardy, ground covering pussytoes with silver-green leaves and fuzzy, white and pink flowers.

Anthirrhimum sempervirens 'Drew's Folly' is a hardy perennial snapdragon with dusty pink flowers and fuzzy dark green foliage.

Arbutus menziesii is an attractive evergreen tree with peeling red/brown bark, clusters of fragrant white or pink flowers and edible scarlet fruit.

Arctostaphylos uva-ursi, known as kinnikinnick or bear berry, is a slow-growing evergreen native ground cover.

Artemisia 'Silver Lining' is a mounding white sagebrush with beautiful, broadly dissected, silver-gray foliage.

Asclepias speciosa is the western North American sister species to the eastern common milkweed (Asclepias syriaca).

Asclepias tuberosa 'Deep Red' is a North American butterfly milkweed with nectar-rich, dark orange flowers.

Asclepias tuberosa is a hot orange butterfly milkweed native to the Eastern North America where it feeds monarch butterflies.

Asphodeline lutea, king's spear or yellow asphodel, has tall, vertical spikesof fragrant, yellow, lily-like flowers.

Buddleja 'Buzz Hot Raspberry' is a dwarf, sterile butterfly bush that blooms continuously with fragrant, hot-raspberry-pink flowers.