Iris sibirica 'Cherry Fling' has gorgeous flowers in shades of pink, violet, white and yellow.

Stunning Lysichiton americanum or skunk cabbage has large, golden yellow spathes in early spring and large "tropical", 3 foot foliage.

Lysimachia congestiflora 'Waikiki Sunset' has yellow-green variegated leaves and cup-shaped yellow flowers all summer long.

Lysimachia lanceolata var. purpurea is an adaptable species with long, linear, purplish leaves and starry, lemon yellow flowers all summer long.

Mahonia nervosa has emerald green, windmill-like leaves and canary yellow spring flowers and waxy blue berries.

Mahonia repens is a very adaptable, native, woodland ground cover with bright, canary-yellow blooms.

Mangave 'Aztec King' is a large succulent that forms rosettes of silvery-blue foliage with faint burgundy spots.

Mangave ''Bad Hair Day' has long, narrow, pointed, spineless, rubbery, lime green leaves with reddish spotting and blushing.

Mangave 'Freckles and Speckles' forms succulent rosettes of green and lavender with burgundy spots.

Mangave 'Inkblot' forms succulent rosettes of green with dark maroon spots.

Mangave 'Lavender Lady' is a unique beauty forming a solitary, succulent rosette of smoky purple leaves.

Mangave 'Man of Steel' produces a medium-sized rosette of narrow, silvery blue leaves.

Mangave 'Mission to Mars' has a unique, intense red colouration to its succulent, rubbery leaves.

Mangave 'Moonglow' has glowing, icy blue foliage mottled with purple spots.

Mangave 'Navajo Princess' forms succulent rosettes of variegated blue-green foliage with cream margins.

Mangave 'Pineapple Express' forms dramatic rosettes with blue-green leaves liberally speckled with burgundy.

Mangave 'Praying Hands' is an amazing succulent with thick green leaves and brown margins growing upward like an artichoke.

Mangave 'Red Wing' forms succulent rosettes in various shades of dark red.

Mangave ''Silver Fox' is a dramatic specimen with Agave-like form and serrated edges as if cut by pinking shears.

Mangave 'Snow Leopard' is a variegated succulent of blue-green foliage with cream margins and pink spotting.

Marrubium rotundifolium is a dramatic groundcover for hot spots with felted silver-green leaves edged in silver-white.

Ostrich fern (Matteuccia struthiopteris) is the source of the early spring culinary delicacy fiddleheads.

The Himalayan blue poppy is a horticultural holy grail. Meconopsis 'Lingholm' is one of the best blue poppies for the garden.

Miscanthus 'Fat Cat' has broad green leaves to three feet with prominent white midribs turning rich ruby in fall. Red flower plumes soar to seven feet.