Prostrate Sumac, Rhus trilobata ‘autumn amber’

Prostrate Sumac, Rhus trilobata ‘autumn amber’

Full Sun
Low Water

Mature Size: 2’X 6’+
Blooming Season: Early spring
Flower Color: Yellow

‘Autumn Amber’ is a low-spreading form of Threeleaf Sumac with a similarly clean appearance and equally tough disposition. Covered with tiny honey-scented flowers in spring, crisp green leaves turning rusty gold in autumn and smooth purplish stems in winter, a few plants can replace a front lawn using a fraction of the water and none of the mowing time.

Pawnee Buttes® Sand Cherry, Prunus besseyi

Pawnee Buttes® Sand Cherry, Prunus besseyi

Full Sun
Medium Water

Mature Size: 2’X 6’
Blooming Season: Spring
Flower Color: White

This low spreading form of Sand Cherry is as rugged as it is handsome. Sprays of fragrant white flowers in spring, succulent fruit for wildlife and glossy green leaves that turn deep mahogany red before they drop in autumn give Pawnee Buttes® appeal year-round with only deep monthly watering once plants are well-established.

Giant or Wild Four o’clock, Mirabilis multiflora

Giant or Wild Four o’clock, Mirabilis multiflora

Full Sun, Part Shade
Low Water

Mature Size: 2’X 5’
Blooming Season: Spring to autumn
Flower Color: Rose pink

As soon as the soil warms up in spring,  the strong new shoots of Giant Four O’clock emerge and, within a few weeks’ time, the first magenta blooms appear. Like clockwork, every afternoon a new flush of flowers open from May until October, making this a colorful companion for evergreens and small trees such as Vitex. After frost, the stems detach from the starchy roots making cleanup quick and easy.

Roundleaf Horehound, Marrubium rotundifolium

Roundleaf Horehound, Marrubium rotundifolium

Full Sun, Part Shade
Low Water

Mature Size: 10”X 24”
Blooming Season: Spring
Flower Color: White

Its soft silver-green foliage and its preference for dry shade earn Roundleaf Horehound a special place in the garden. Not as aggressive as its weedy cousin, Common Horehound, or the much-used Wooly Lamb’s Ears, it is much more attractive in winter and fills an important niche as living mulch under trees and large shrubs and as contrast for spring bulbs and shade-loving ornamental grasses.

Creeping Mahonia, Mahonia repens

Creeping Mahonia, Mahonia repens

 Full Shade
Medium Water

Mature Size: 1’X 2’
Blooming Season: Spring
Flower Color: Yellow

The shade of a tree or large shrub along the north side of a courtyard wall with the runoff from a nearby downspout is the ideal setting for this high elevation evergreen groundcover. Given the right spot, your reward will be year-round yellow flowers among the bright green leaves in spring, deep blue-green leaf color turning red-purple in cold weather. In larger spaces where a bit more height is needed, the closely related Compact Mahonia is another option.