Agave 'Ripple Effect' is a variegated form of 'Mr Ripple' with wide, blue-green undulating leaves with dramatic, broad golden yellow margins.

Agave 'Shaka Zulu', also known as 'Blue Glow' is a tender Century Plant with blue-green, coarse tooth foliage edged in yellow and red.

Albizia Chocolate Fountain is a weeping silk tree with burgundy foliage and months of pink puff ball flowers through summer.

Albizia Merlot Majik has merlot-purple, dissected foliage that deepens in colour through the summer and is topped by fuzzy pink flowers for months on end.

Albuca bracteata (syn. Ornithogalum caudatum), pregnant or sea onion, looks like an onion with thick, bright green leaves.

Albuca spiralis 'Frizzle Sizzle' is a zany zone 8 bulb with some of the most surprising foliage in the botanical world.

Alcea rosea 'Nigra' is the black hollyhock.

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.

Allium 'Red Mohican' is a special purple-red selection with fragrant drumsticks on tall stems.

Allium ampeloprasum, wild leek, is where leeks, elephant garlic, and pearl onions come from. It can bloom at 6 feet high!

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

Allium atropurpureum has many star shaped, warm purple florets held in upward facing half domes about the size of a tennis ball.

Allium 'Red Eye'/'Silver Spring' has tight heads of fragrant, white, star-like flowers with dark purple ovaries surrounded by a flush of pink.

Allium beesianum is a rare species from China with blue, nodding umbels above grass-like foliage.

Allium caeruleum has royal blue flowers and hails from central Asia, western Siberia and China.

Allium caesium is a rare ornamental onion with large 4 inch wide, sky blue to milky royal blue spheres held on stems to about two feet tall.

Allium carinatum ssp. pulchellum 'Album' offers pure white fireworks of small florets in the summer garden

Allium carinatum ssp. pulchellum looks like fireworks of rosy-purple florets in the summer garden.

Allium chloranthum 'Yellow Fantasy' has open flower heads like exploding fireworks of yellow to greenish yellow.

Allium chloranthum is a rare species from Lebanon and southern Turkey with open flower heads like exploding fireworks of yellow to greenish yellow.

Allium convallarioides is a rare species with delicate, bell-shaped, white flowers held in a loose sphere.

Allium cowanii is a lovely smaller species with open, domed heads of pure white flowers on stems to about 12-16 inches high.