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.

Actaea japonica 'Silver Dance' has wands of creamy-white bottle brush flowers and silver foliage maturing to green.

Actaea (Cimicifuga) 'White Pearl' has dissected green foliage and exceptionally long spires of fragrant white flowers in late summer.

Actaea pachypoda 'Misty Blue' is a white baneberry with bluish foliage and white flowers followed by white fruit with a black dot.

Actaea (syn. Cimicifuga) 'Black Negligee' has lacy black foliage and wands of fragrant, white flowers in late summer.

Adenophora 'Gaudi Violet' is a beautiful bellflower relative with elegant spikes of light violet bell-shaped flowers.

Adiantum pedatum, the northern Maidenhair fern, is one of the most beautiful of all ferns with distinctive palmate fronds.

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

Ajuga Feathered Friends 'Cordial Canary' is a semi-evergreen bugleweed with bright gold foliage and cobalt-blue flowers.

Ajuga Feathered Friends 'Fancy Finch' is a semi-evergreen bugleweed offering colours of gold, bronze and green with blue flowers.

Ajuga Feathered Friends 'Fierce Falcon' is a semi-evergreen bugleweed with glossy, purple to black foliage and cobalt-blue flowers.

Ajuga Feathered Friends 'Noble Nightingale' is a semi-evergreen bugleweed with metallic black leaves and cobalt with blue flowers.

Ajuga Feathered Friends 'Parrot Paradise' is a semi-evergreen bugleweed with yellow, orange, and red leaves with blue flowers.

Ajuga Feathered Friends 'Petite Parakeet' offers shades of yellow, red and green leaves with cobalt blue flowers.

Ajuga Feathered Friends 'Tropical Toucan' is a semi-evergreen bugleweed with golden yellow leaves with blue flowers.

Ajuga 'Valfredda' Chocolate Chip has small, narrow, elongated leaves that are flushed with burgundy when young and in more sun.

Ajuga tenorii 'Princess Nadia' has gorgeous variegated leaves in shades of grey-green, cream, and pink topped with reblooming purple-blue flower spikes.

Alcea rosea Spotlight 'Blacknight' is a hollyhock with large, old-fashioned, single, purple-black flowers with small white eyes.

Alcea rosea Spotlight 'Mars Magic' is a hollyhock with large, old-fashioned, single, red flowers with bright yellow eyes.

Alcea rosea Spotlight 'Polarstar' is a hollyhock with large, old-fashioned, single white flowers with bright yellow eyes.

Alcea rosea Spotlight 'Radiant Rose' is a hollyhock with large, old-fashioned, single rosy-pink flowers with bright yellow eyes.

Allium 'Medusa's Hair' is an ornamental onion with snake-like, green foliage and purple flower spheres.

Allium 'Serendipity' forms two inch spheres on tall blue-green stems like rose-purple balloons floating in the summer garden.

Amelanchier alnifolia or Saskatoon berry offers tasty blueberry-like fruit and is also in important pollinator plant.