Common name:Hoop's Blue Spruce
Botanical name:Picea pungens 'Hoopsii'

Hoop's is a cultivar of Colorado Spruce selected for its outstanding, consistent blue color. New growth is especially bright blue. It has a pyramidal form with horizontal branches, with dense, silvery-blue needles. Fast growing to 30 to 50 feet tall and 10 to 50 feet wide.

Common name:Zagreb Coreopsis
Botanical name:Coreopsis verticillata 'Zagreb'

'Zagreb' is a threadleaf coreopsis cultivar with more compact foliage, and deeper yellow golden flowers that bloom most all summer. Grows about 12 to 15 inches tall and wide. Ideal for sunny, hot perennial borders, parkstrips, walkways.

Common name:Purple Coneflower
Botanical name:Echinacea purpurea

The Purple Coneflower is a long-lived, reliable standby for the perennial garden. And while not xeric, it manages quite well with just weekly watering. Rosy purple petals fall below the prominent orange-tinged cone and blooms in late June to September. Foliage is large, with a rounded lance shape. An excellent cut flower, they provide nectar for bumblebees and butterflies, and the seeds provide forage for migrating song birds, so don't cut them all!

Common name:Blue Spire Russian Sage
Botanical name:Perovskia 'Blue Spire'

'Blue Spire' is a selection of perovskia that grows about 3 to 4 feet tall and 2 to 3 feet wide (though it will grow larger if over-watered). New wood is white and fuzzy; leaves are a soft green to grey-green and finely cut, giving it an airy appearance. Flower spires of fuzzy, lavender blue flowers begin in June and continue through the summer months. Useful in the perennial or shrub border, with ornamental grasses, and as a cut flower.

Common name:Creeping Hummingbird Trumpet
Botanical name:Zauschneria garrettii 'Orange Carpet'

This superb Hummingbird Trumpet spreads like a groundcover to form a loose mat of low growing, bright green foliage, about 4 to 6 inches tall and 15 to 18 inches wide. In mid-to-late summer it lights up the garden with a profusion of bright orange flowers that last for many weeks. Regular watering (but not over-watering) when in bloom keeps the flowers coming. 'Orange Carpet' prefers some afternoon shade, especially at lower elevations. Originally selected by David Salman of High Country Gardens. This zauschneria is practically made for parkstrips.

Common name:Karl Foerster Feather Reed Grass
Botanical name:Calamagrostis acutiflora 'Karl Foerster'

Karl Foerster feather reed grass is a garden favorite, and for good reason. Its green, fine-textured foliage is gently arching and grows to about 2 feet tall and wide. Oat-like plumes stand very erect over the foliage, growing as tall as 5 to 6 feet. Plumes open whiteish green, later turning a dusky rose, and then tawny colored by winter. Blooms early summer with the plumes lasting into autumn. Holds its presence well into winter. Excellent in mixed perennial or shrub borders, or massed.

Common name:Lambs' Ear
Botanical name:Stachys byzantina

Lambs' ear is a most fabulous perennial and groundcover, grown primarily for its soft, velvety leaves. It grows about a foot or so tall and spreads 2 to 3 feet. Leaves are grey-green and hairy, with the hairs giving the leaves a silvery cast. Though not really evergreen, the leaves turn a lovely buff come fall and persist well into the winter months, until buried under snow. Erect flowering stems arise May and June, with pink to lavender flowers at the terminal end. Some remove the flower stems before they bloom, but they are simple and charming. Use as a edging plant for a perennial, shrub, or foundation border, or as a ground cover. There are some named cultivars; 'Helene Von Stein' and 'Big Wave' claim to be flowerless, though in my experience they all eventually come to flower. Leaves are wonderful on wreaths (but you'll need a glue gun). There are lambs ear planted at the Washington Square Demonstration Garden.

Common name:Variegated Iris
Botanical name:Iris pallida 'Variegata'

If I had to pick my top five must-have perennials, this would be on the list. A species of bearded iris, yellow variegated iris has long, sword like foliage that emerges in early spring and is colored pale, grey-green and lemony yellow. Flowers bloom late spring to early summer, are a pale blue to violet-blue, and are very fragrant (like a cross between grape and apple juice). Absolutely fills the yard. And after flowering, the foliage holds out all summer, unlike other bearded iris; the variegated leaves a striking presence, even without the flowers. The foliage is about 18 to 24 inches tall, and the flowers rise to about 30 to 40 inches. I have never had a garden that didn't include this iris. There is also a variety with white variegation, usually listed as Iris p. 'Argenta.' Fabulous anywhere, and plant enough so you can cut them and bring them indoors.