Acanthus mollis is a dramatic architectural plant with large, glossy, mid-green leaves and 3-4 foot tall flower spikes.

Acanthus mollis 'Hollard's Gold' is a very special bear's breeches with new leaves emerging gold or chartreuse.

Acanthus 'Morning Candle' is very free-flowering with extra tall and stately spires of mauve bracts and white flowers up to four feet tall.

Acer palmatum 'Fireglow' is a heat-tolerant Japanese maple with pinkish-red leaves in spring becoming purple-red in fall.

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

Aframomum melegueta or grains of paradise is a tropical ginger grown for its pepper-flavoured seeds.

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

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

Agastache 'Little Adder' forms clouds of lavender-blue flowers for months on compact plants. A dwarf form of the superlative 'Black Adder'.

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

Agastache 'Bolero' has purple-flushed foliage that gives rise to warm purple flowers filled with nectar for hummingbirds.

Dwarf plants with big flower power for containers or the front of the border.

Licorice-scented foliage topped with magenta-red flowers all summer long. Sit back and enjoy the hummingbirds!

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

Clouds of lavender-blue flowers for months.

Agastache Sunrise Violet is a long-blooming hummingbird mint offering a beautiful display of tubular flowers that are red in bud opening to pinkish lavender.

Agave albopilosa 'Tufts' is a rare, dwarf century plant with stiff, dark green leavestipped with white hairs like little cotton balls!

Ajuga reptans 'Princess Leia' is a tricolour variegated, evergreen bugleweed with silver-green, creamy white and dark green foliage.

Akebia 'Silver Bells' is a Chocolate vine with attractive leaves and vanilla-scented, white and purple flowers.

Alcea rosea 'Halo Lavender' has unique lavender-purple flowers with a glowing pink ring surrounding a yellow centre.

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

Alcea rosea Spring Celebrities Purple has double, magenta-purple flowers on stems to just 3 feet tall.

Allium alitissimum is the tallest of all ornamental onions at 5-6 feet with large, warm purple spheres.

Allium 'Forelock' is a special purple-burgundy selection with fragrant drumsticks on tall stems.

Glowing magenta-purple-red flower heads the size of tennis balls!