Xeric Gardening 101

Image courtesy City of Boulder

By Stephanie Swartz
Special to Boulder Beat

The plants in these sortable lists are suited for the climate of Colorado’s Front Range. They are all perennial, xeric and prefer well-drained soil.

Perennials live for two or more years, as opposed to annuals that live only one year. Xeric plants have low irrigation requirements once established.

Establishment can take a few years, so plan to water more initially and gradually reduce irrigation over the next few years. Well-drained soil means water will percolate through the soil quickly and not pool.

Colorado soils are generally high in clay, sand and/or rock. Sandy soil drains well, but even clay can work for these plants as long as they aren’t watered too often.

Since the plants on this list are suited for Colorado soil, you are unlikely to need to add amendments.

You can find a wealth of well-researched information on planting in Colorado on the Colorado State University (CSU) Extension website. Here are a few handy links: CSU Extension website, Garden Notes, Xeric soil amendments.

Sections: Ground cover, Herbaceous Perennials

Ground cover, full sun (at least 6 hours of sun per day)
Photograph Scientific name Common name Native to CO Height Spread Blooms Attracts Resists
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Achillea ageratifolia Greek yarrow No 24-36″ 10-12″ June – August
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Achillea tomentosa woolly yarrow No 6-8″ 8-12″ June – August
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Anacyclus pyrethrum depressus Mount Atlas daisy, pellitory, Spanish chamomile No 4-5″ 8-12″ April – May
Antennaria dioica pussytoes, mountain everlasting, catsfoot, cudweed No 2-4″ 12-18″ May – June
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Arabis caucasica snowcap rockcress, garden arabis, mountain rock cress No 4-6″ 6-8″ April – May
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Arenaria montana mountain sandwort No 2-4″ 10-12″ May – June
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Artemisia frigida fringed sage, prairie sagewort, pasture sage Yes 9-16″ 12-16″ August – September
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Artemisia schmidtiana silvermound sage No 10-12″ 12-23″ June
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Artemisia stelleriana silver brocade sage, hoary mugwort, dusty miller No 6-12″ 23-29″ Insignificant
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Aurinia saxatilis basket-of-gold, goldentuft alyssum, rock madwort No 6-12″ 12-18″ April – May
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Callirhoe involucrata purple poppy mallow, winecups Yes 10-12″ 23-29″ June – August
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Calylophus serrulatus sundrops, toothed evening primrose Yes 6-18″ 6-18″ June – September
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Cerastium tomentosum snow-in-summer, tomentose chickweed No 6-8″ 23-29″ May – June
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Coreopsis auriculata dwarf coreopsis, lobed tickseed, mouse ear coreopsis No 6-10″ 8-12″ June-September
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Delosperma spp. & hybrids ice plant No 2-4″ 12-23″ May – August
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Eriogonum umbellatum sulfur flower, sulfur buckwheat Yes 6-12″ 12-36″ May – July
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Glandularia bipinnatifida prairie verbena, Dakota vervain Yes 10-12″ 38-50″ May – September
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Glandularia canadensis rose verbena, clump verbena, rose vervain Yes 6-18″ 12-24″ July – September
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Oenothera speciosa pinkladies, pink evening primrose, showy evening primrose No 9-12″ 12-18″ June – October
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Penstemon pinifolius pineleaf penstemon No 10-12″ 12-18″ June – September
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Potentilla neumanniana alpine cinquefoil, spring cinquefoil, spotted cinquefoil No 3-6″ 6-12″ May – August
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Saponaria ocymoides rock soapwort No 6-8″ 12-23″ May – July
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Sedum acre goldmoss sedum No 2-3″ 12-23″ May – June
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Sedum kamschaticum kamschatka sedum No 4-6″ 12-18″ July – August
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Sedum spurium stonecrop No 4-6″ 12-18″ July – August
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Stachys byzantina lamb’s ear No 12-18″ 12-23″ June – July
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Tanacetum densum spp. amani partridge feather No 6-10″ 15″ May – June
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Thymus praecox creeping thyme No 2-4″ 12-18″ June – July
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Veronica liwanensis Turkish veronica No 1-2″ 18-24″ April-June
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Zauschneria californica latifolia hummingbird trumpet, mountain California fuchsia, zauschneria arizonica No 18-24″ 36-48″ May – September
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Zauschneria garrettii orange carpet hummingbird trumpet No 4-6″ July-August
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Zinnia grandiflora Rocky Mountain zinnia, paper flower Yes 4″ 15″ August-October
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Herbaceous Perennials, full sun (at least 6 hours of sun per day)
Photograph Scientific name Common name Native Height Spread Blooms Attracts Resists
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Achillea filipendulina fernleaf yarrow No 36-48″ 12-36″ June – September
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Achillea millefolium common yarrow Yes 12-24″ 12-24″ June – September
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Achillea ptarmica pearl yarrow, sneezewort, sneezeweed No 18-24″ 18-24″ June – September
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Agastache aurantiaca hyssop, orange hummingbird mint No 18-30″ 18-24″ July – October
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Agastache cana hummingbird mint No 12-36″ 12-24″ July – October
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Agastache foeniculum anise hyssop Yes 24-36″ 18-36″ July – October
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Agastache rupestris sunset hyssop No 12-36″ 12-24″ July – October
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Aquilegia caerulea Colorado columbine, rocky mountain columbine, Colorado blue columbine Yes 18-24″ 12-18″ May – June
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Aquilegia chrysantha golden columbine, yellow columbine, southwestern yellow columbine Yes 36-48″ 12-24″ May – August
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Baptisia australis false indigo No 36-48″ 36-48″ May – July
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Berlandiera lyrata chocolate flower Yes 18-24″ 18-24″ June – September
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Centaurea montana mountain bluet, perennial bachelor button No 18-24″ 12-18″ June – July
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Centranthus ruber red valerian, Jupiter’s beard No 24-36″ 24-36″ June – August
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Coreopsis grandiflora dwarf double coreopsis, large-flowered tickseed No 12-24″ 12-36″ June – August
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Coreopsis lanceolata lanceleaf coreopsis, lance-leaved coreopsis, lanceleaf tickseed, sand coreopsis Yes 12-24″ 12-18″ June – July
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Coreopsis verticillata threadleaf coreopsis, fernleaf coreopsis, threadleaf tickseed, whorled tickseed, whorled coreopsis No 12-36″ 18-24″ June – September
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Delphinium barbeyi subalpine larkspur Yes 24-60″ 12″ June – August
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Echinacea purpurea purple coneflower, eastern purple coneflower No 24-48″ 18-24″ June – August
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Echium amoenum red feathers No 12-16″ 6-8″ May – June
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Erigeron speciosus Aspen fleabane, showy fleabane, garden fleabane, horseweed, seaside daisy, showy daisy, showy fleabane Yes 12-30″ 12-24″ June – September
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Eryngium planum sea holly No 24-36″ 12-24″ June – August
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Eschscholzia californica California poppy Yes 6-8″ 6-12″ June – September
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Gaillardia aristata native blanket flower, common gaillardia, great blanketflower, blanketflower, brown-eyed susan Yes 24-36″ 24-36″ July – September
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Gaillardia x grandiflora blanket flower, Indian blanket Yes 18-24″ 10-12″ June – August
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Gaura lindheimeri whirling butterflies, lindheimer’s beeblossom, white gaura, pink gaura, lindheimer’s clockweed, Indian feather No 36-60″ 12-24″ July – September
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Gazania linearis hardy gazania No 4-6″ 6-18″ May – October
Helianthemum nummularium sunrose No 8-12″ 36″ May – July
Hemerocallis spp. daylily No 12-48″ 12-24″ June – July
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Iberis sempervirens candytuft, evergreen candytuft No 12-18″ 12-18″ April – June
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Iris germanica iris hybrids, German iris, bearded iris No 8-30″ 12-24″ May – June
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Iris missouriensis Rocky Mountain iris, western blue flag Yes 12-24″ 10-12″ May – June
Knautia macedonica knautia, Macedonian scabious, widow flower No 18-36″ 18-24″ June – August
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Kniphofia caulescens regal torch lily No 40″ 24-36″ July – September
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Kniphofia uvaria torch lily, red hot poker No 24-48″ 24-36″ July – September
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Lavandula angustifolia English lavender, common lavender No 12-18″ 24-30″ May – September
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Liatris spicata blazing star, gayfeather, prairie feather No 18-36″ 12-24″ July – September
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Linum lewisii prairie flax, Lewis flax, wild blue flax Yes 18-24″ 12-24″ May – July
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Lychnis coronaria rose campion No 18-36″ 12-24″ May – July
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Machaeranthera bigelovii Bigelow’s tansyaster, sticky aster Yes 12-36″ 12-36″ August – October
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Mirabilis multiflora desert four o’clock Yes 36″ 36″ June – September
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Nepeta spp. catmint No 8-36″ 18″ May-October
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Oenothera macrocarpa ssp. Incana evening primrose, bigfruit evening primrose, silver leaf primrose No 4″ 16-24″ April-August
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Papaver orientale oriental poppy No 24-30″ 6-24″ May – June
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Penstemon grandiflorus large beardtongue No 18-36″ 12-24″ May
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Penstemon linarioides var. coloradoensis bluemat penstemon, toadflax penstemon Yes 8-12″ 12-16″ May – June
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Penstemon rostriflorus beaked penstemon, bridge penstemon Yes 12-36″ 6-12″ July – September
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Penstemon strictus Rocky mountain penstemon Yes 24-30″ 36″ May – August
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Phlox longifolia longleaf phlox Yes 4-6″ 12-24″ May – June
Phlox subulata creeping phlox No 4-6″ 12-24″ May – June
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Potentilla nivea snowy cinquefoil Yes 12″ 12″ June – August
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Pulsatilla patens eastern pasqueflower, prairie crocus, American pasqueflower Yes 4-6″ 3-6″ March-June
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Pulsatilla vulgaris pasque flower No 6-12″ 12″ March – April
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Ratibida columnifera prairie coneflower, mexican hat, long-headed coneflower Yes 12-36″ 12-18″ June – October
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Rudbeckia fulgida perennial black-eyed Susan, orange coneflower No 24-36″ 12-24″ July – September
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Salvia argentea silver sage No 24-36″ 12-18″ June – July
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Salvia nemorosa woodland sage, blue sage, wild sage, Balkan clary No 18-24″ 24-36″ June – August
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Veronica spicata royal blue veronica No 16″ 16″ June – August
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Viola corsica Corsican violet No 6-8″ 12″ April-September
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