Acanthus 'Morning Candle' is very free-flowering with extra tall and stately spires of mauve bracts and white flowers up to four feet tall.
Achillea ageratifolia is an unusual yarrow forming aromatic, silver-green, mounds covered in pure white daisies with light yellow centres.
Actinidia arguta 'Chang Bai' was discovered in China near the border with North Korea. Its fruit is very sweet and resembles an apple in shape.
Actinidia 'Flowercloud Male' is an early blooming male cultivar that produces a profusion of flowers. It is an excellent pollinator to increase fruit production on 'Issai'.
Actinidia kolomikta 'Frost' produces good, early crops of medium to large, bright green, very sweet fruit high in vitamin C.
Actinidia kolomikta 'Hero' was discovered in the Russian Far East and produces abundant crops of large, light green, very sweet fruit.
Agapanthus 'Purple Cloud' is one of the darkest lily-of-the-Nile with rich, purple-blue, tubular flowers.
Agastache 'Rosie Posie' is a compact cultivar with two-tone, magenta and pink flowers that will bloom all summer and attract pollinators.
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 fragrant foliage for months in the sunny garden.
Agave utahensis ssp. eborispina is a dramatic, super hardy, small agave with the longest terminal spines of the subspecies up to 4 inches long!
Agave utahensis ssp. kaibabensis is the largest and most cold hardy subspecies of the Utah century plant tolerating zone 5 winters.
Albuca 'Frizzle Sizzle' is a zany zone 8 bulb with some of the most surprising foliage in the botanical world.
Alcea rosea 'Halo Cerise' has glowing pink to magenta flowers with deep royal purple centres.
Alcea rosea 'Halo Lavender' has unique lavender-purple flowers with a glowing pink ring surrounding a yellow centre.
Allium schoenoprasum 'Curly Mauve' offers a more ornamental take on the garden chive with curly, blue-grey leaves and silver-pink flowers.
Allium 'Pink Planet' has bluish-green, twisting foliage and dense balls of silver-pink flowers in late summer.
Allium tanguticum 'Summer Beauty' blooms in mid to late summer with numerous spheres of lavender-pink flowers popular with pollinators.
'Pink Blush' is a small, easy-to-grow Aloe with cute leaves in shades of white and pink with numerous raised bumps and stripes.
Alstroemeria 'Indian Summer' has flowers in orange, red, and yellow with luscious bronze-infused foliage.
Alstroemeria Inca Bandit has masses of tropical looking, bright red blooms from early summer to fall.
Alstroemeria Inca Husky has masses of tropical looking flowers in sunset shades of apricot, yellow and deep pink from early summer until fall.
Alstroemeria Inca Lolly has luscious hot reddish pink flowers that last all spring and summer.
Alstroemeria Inca Lucky has magenta buds that open to clear white with salmon pink throats that last all spring and summer.
Alstroemeria Inca Sundance is a dreamy, tropical-looking flower in sunshine yellow with hints of pink.
Alstroemeria Majestic 'Louis' is a tall, floriferous Peruvian lily with strongly fragrant flowers in tangerine orange flowering continuously from mid spring to frost.
Amianthium muscitoxicum is a rare eastern North American native with spikes of pure white, glistening, star-like flowers that turn green and bronze.
Spectacular and elegant, Anemone 'Dreaming Swan' has large, semi-double flowers with lilac blue reverses from late June through October.
Anemone 'Lucky Charm' has bright pink flowers with a pale halo of white and young foliage in purple shades.
Anemone 'Ruffled Swan' is the tallest of the Swan series with spectacular, semi-double, white flowers with violet blue reverses on stems to 32 inches all summer.
Anemone 'Red Riding Hood' is a vigorous, clumping selection with thickly-petaled flowers in deep, rosy, magenta-pink.
Anemone quinquefolia is an eastern North American native forest groundcover closely related to the European A. nemorosa with charming white flowers in spring.
Anemone 'Loreley' has large, semi-double, palest pink flowers with ruffly, rose-pink edges atop tall stems.
Anigozanthos 'Bush Gold' has tubular golden flowers that look like kangaroo's paws and bloom for months.
Anigozanthos 'Bush Ranger' has tubular red and green flowers that look like kangaroo's paws and bloom for months.
Anigozanthos 'Bush Tango' has tubular orange, apricot and red flowers that look like kangaroo's paws and bloom for months.
Arbutus menziesii is an attractive evergreen tree with peeling red/brown bark, clusters of fragrant white or pink flowers and edible scarlet fruit.
Aruncus 'Chantilly Lace' produces lacy, branched, horizontal spikes of creamy white flowers atop Astilbe-like foliage.
Aruncus 'Guinea Fowl' is a compact and floriferous goat's beard with highly dissected, fern-like, crinkly leaves and horizontal spikes of bright white flowers on red stems.
Asarum arifolium is a wild ginger with arrow-shaped, anise-scented, deep green leaves with silver marbling and strange brownish purple, urn shaped flowers.
Asclepias curassavica is a milkweed with blooms in scarlet red and orange.
Asclepias tuberosa 'Blonde Bombshell' is a golden yellow form of this eastern North American butterfly milkweed.
Asimina 'Allegheny' is an early ripener, very productive, great flavour with 1/2 pound fruits.
Asimina 'Davis' is one of the earliest ripeners with excellent reliability and productivity. The fruit is large, sweet, and of high quality.
Asimina 'KSU-Atwood' ripens in mid season with incredibly heavy crops of up to 150 fruit per tree! The fruit is rich and delicious.
Asimina 'Mango' is one of the most vigorous of all paw paws quickly becoming a small tree with large, tasty fruit with orange-yellow fruit.
Asimina 'Maria's Joy' produces medium to large, kidney-shaped fruit with delicious yellow flesh that can weigh almost a pound.
Asimina 'NC-1' is a Canadian selection that is early ripening producing abundant crops of large, flavourful fruit.
Asimina 'Pennsylvania Golden' is one of the earliest ripening varieties performing particularly well in cool summer regions. It produces good crops of large, sweet, tasty fruit.
Asimina 'Prolific' is a precocious tree often bearing fruit just two years after planting! It is early ripening and produces abundant crops of medium to large, sweet, tasty fruit.
Asimina 'Rappahannock' ripens early with abundant crops of medium to large fruit prized for its sweet and refreshing flavour with firm flesh and a low seed count.
Asimina 'Shenandoah' is one of the largest, sweetest and most flavourful cultivars with one pound fruits.
Asimina 'Sunflower' is one of the most reliable and popular varieties producing good crops of very large, sweet and delicious fruit.
Asimina triloba 'Taylor' is a productive and early ripening variety with abundant crops of sweet and delicious fruit and a light yellow flesh.
Aster macrophyllus 'Twilight' forms a groundcover of heart-shaped leaves and late summer clusters of lavender-blue flowers popular with bees and butterflies.
Aster pyrenaeus 'Lutetia' has soft lavender, narrow-petaled flowers opening from pink buds on purple stems.
Astilbe biternata is the only member of the genus native to North American with stately pyramidal spires of white flowers.
Athyrium 'Dre's Dagger' is a crazy fern with criss-crossing, apple green pinnae and crested tips all on red stems!
Athyrium filix-femina 'Lady in Lace' looks like a fern crossed with parsley. It forms a dwarf mound of highly crinkled, mid green foliage.