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.

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

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

Agapanthus 'Valencia' offers sky blue flowers with darker veins and reverses on dark stems.

Agapanthus Fireworks is a striking lily-of-the-Nile with bicolour flowers of violet blue and white.

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.

Allium 'In Orbit' is an ornamental onion that forms 3 inch wide drumstick spheres of lavender-purple.

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

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

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

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

Angelica gigas produces giant, crimson-purple, umbrella-shaped flowers on dark stalks nearly two metres high!

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.

Aquilegia canadensis 'Little Lanterns' is short in stature but free-flowering with red and yellow flowers popular with hummingbirds.