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.

Hardy Purple Iceplant, Delosperma cooperi

Hardy Purple Iceplant, Delosperma cooperi

Full Sun
Low Water

Mature Size: 6”X 18”
Blooming Season: Summer
Flower Color: Purple-Pink

Purple Iceplant is another fine South African introduction, valued for its shimmering fuchsia-purple daisies that keep coming all summer. A vigorous spreader, it forms a dense mat of succulent, linear green leaves in any well-drained soil. Stop watering in mid-fall to harden for winter. This plant has become a staple in xeric gardens. Right at home where planted to spread on top of gravel mulch; it helps to cool down these hot areas.

Hardy Plumbago, Ceratostigma plumbaginoides

Hardy Plumbago, Ceratostigma plumbaginoides

Full Sun, Part Shade
Medium Water

Mature Size: 12”X 24”
Blooming Season: Early Fall
Flower Color: Blue

An outstanding, long-lived groundcover that slowly weaves itself into the garden, creating large drifts of fall color. The deep blue flowers, which begin as the weather begins to cool and days grow shorter, are numerous and long lasting. As the plant’s flowering finishes, its leaves begin a month-long change to a vivid mahogany-red color. Plumbago is extremely adaptable, growing equally well in sun or shade, and thriving in a wide range of soil types.

Yerba Mansa, Anemopsis californica

Yerba Mansa, Anemopsis californica

Full Sun, Part Shade
Medium Water

Mature Size: 1’X 3’+
Blooming Season: Summer
Flower Color: White

Widely regarded as a medicinal plant, and often found in the bosque as the wild groundcover under Cottonwoods, the landscape value of Yerba Mansa is finally being recognized. Its white coneflowers stand a foot above a dense carpet of large thick leaves that are deep green during the growing season, turning red and then a rich rusty brown through winter.