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

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

Actaea japonica 'Silver Dance' is 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.

Adiantum raddianum 'Fragrantissimum' is an evergreen maidenhair fern with arching black stems and light green aromatic fronds.

Agapanthus 'Galaxy Blue' has large umbels of royal blue, trumpet-shaped blossoms. Hardy to zone 6!

Agapanthus 'Galaxy White' has five inch wide umbels of white, trumpet-shaped blossoms on tall stems. Hardy to zone 6!

Agapanthus 'Poppin' Purple' is a compact, fast-growing lily-of-the-Nile with violet purple flowers.

Agapanthus 'Summer Love Blue' has fragrant violet-blue flowers on strong green stems and green, strap-like foliage.

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

Agastache 'Blue Bayou' is a long-blooming hummingbird mint with blue tubular flowers and aromatic foliage.

Hot sunny spots will never be the same with long-blooming Agastache 'Blue Boa'. Butterflies and bees will love you!

'Crazy Fortune' is a sport of Agastache 'Blue Fortune' with lavender blue flowers and variegated foliage.

Agastache 'Danish Delight' is an anise hyssop with vibrant hot pink to reddish-purple blooms and fragrant green foliage.

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 'Pink Pearl' is a stunning hummingbird mint with dense spikes of mid pink buds opening to glowing light pink flowers.

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

Agastache 'Rosie Posie' is a compact cultivar with two-tone, magenta and pink flowers that will bloom all summer and attract pollinators.

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 Kudos 'Red' hummingbird mint has bright true red flowers atop aromatic foliage for months in the sunny garden.

Buddleia 'Birthday Cake' is a butterfly bush with upright, fragrant purple flowers that bloom from summer into fall.

Buddleia 'Blueberry Pie' is a compact butterfly bush with fragrant blue-purple flowers with white and yellow centres.

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

Buddleia 'Miss Molly' is the reddest of all butterfly bushes with fragrant, glowing magenta flowers all summer long.

Buddleja Buzz 'Sky Blue' is a dwarf butterfly bush that blooms from summer to fall with fragrant, lavender-blue flowers.

Buddleia 'Lilac Cascade' is a mid-sized, long-blooming, sterile butterfly bush with huge cones of fragrant lilac flowers.

Buddleia 'Pink Cascade II' is a mid-sized, long-blooming, sterile butterfly bush with huge cones of fragrant, pink flowers.

Buddleja 'Dartmoor' has giant clusters of warm purple flowers that dwarf all other cultivars.