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Cold Tolerances
High Elevation plants are adapted to elevations from 4500-6500 ft., Middle
Elevation plants to 2500-4500 ft., |
| ° F | Zone | Low | Middle | High | Plant | ||
| BOTANICAL NAME | COMMON NAME | Temp | USDA | ELEVATIONS | Type | ||
| Abutilon palmeri | Indian Mallow | 25 | 9 | X | S | ||
| Acacia aneura | Mulga | 15 | 8 | X | X | T | |
| Acacia berlandieri | Guajillo | 15 | 8 | X | X | T | |
| Acacia constricta | Whitethorn Acacia | 5 | 7 | X | X | S | |
| Acacia craspedocarpa | Leatherleaf Acacia | 20 | 9 | X | S | ||
| Acacia farnesiana (A. smallii, A. minuta) | Sweet Acacia | 10 | 7 | X | X | T | |
| Acacia greggii | Catclaw Acacia | 0 | 7 | X | X | T | |
| Acacia occidentalis | 15 | 8 | X | X | T | ||
| Acacia pennatula | Fernleaf Acacia | 32 | 10 | X | T | ||
| Acacia redolens | Desert Carpet™ | 15 | 8 | X | X | GC | |
| Acacia rigidula | Blackbrush Acacia | 15 | 8 | X | X | T | |
| Acacia salicina | Willow Acacia, Coobah | 20 | 9 | X | T | ||
| Acacia schaffneri | Twisted Acacia | 15 | 8 | X | X | T | |
| Acacia stenophylla | Shoestring Acacia | 15 | 8 | X | X | T | |
| Acacia willardiana | Palo Blanco | 25 | 9 | X | T | ||
| Acalypha monostachya | Raspberry Fuzzies™ | 10 | 7 | X | X | GC | |
| Achnatherum hymenoides (Oryzopsis hymenoides) | Indian Rice Grass | -20 | 5 | X | X | X | G |
| Agave americana v. marginata | Variegated Century Plant | 15 | 8 | X | X | A | |
| Agave americana v. mediopicta | 15 | 8 | X | X | A | ||
| Agave angustifolia v. marginata | 20 | 9 | X | A | |||
| Agave bovicornuta | Cow's Horn Agave | 20 | 9 | X | A | ||
| Agave bracteosa | Spider Agave | 15 | 8 | X | X | A | |
| Agave celsii | 15 | 8 | X | X | A | ||
| Agave chrysantha | 10 | 7 | X | X | A | ||
| Agave colorata | Mescal Ceniza | 15 | 8 | X | X | A | |
| Agave desmettiana | 25 | 9 | X | A | |||
| Agave desmettiana ‘Variegata’ | 25 | 9 | X | A | |||
| Agave geminiflora | Twin-flowered Agave | 20 | 9 | X | A | ||
| Agave guiengola | 25 | 9 | X | A | |||
| Agave havardiana | Havard Agave | -10 | 6 | X | X | X | A |
| Agave lophantha | Center Stripe Agave | 15 | 8 | X | X | A | |
| Agave macroacantha | 25 | 9 | X | A | |||
| Agave montana | Mountain Agave | 5 | 7 | X | X | A | |
| Agave multifilifera | Chahuiqui | 20 | 9 | X | A | ||
| Agave murpheyi | Murphy Agave | 10 | 7 | X | X | A | |
| Agave ocahui | 15 | 8 | X | X | A | ||
| Agave ovatifolia | 10 | 7 | X | X | A | ||
| Agave palmeri | Palmer Agave | 0 | 7 | X | X | X | A |
| Agave parrasana | 15 | 8 | L | X | A | ||
| Agave parryi v. neomexicana | -10 | 6 | X | X | X | A | |
| Agave parryi v. parryi | -20 | 5 | X | X | X | A | |
| Agave parryi v. truncata | Artichoke Agave | 10 | 7 | X | X | A | |
| Agave parviflora | 10 | 7 | X | X | A | ||
| Agave potatorum | 25 | 9 | X | A | |||
| Agave salmiana ssp. ferox | 0 | 7 | X | X | A | ||
| Agave scabra | Rough-leafed Agave | 0 | 6 | X | X | X | A |
| Agave schidigera | Durango Delight™ | 15 | 8 | X | X | A | |
| Agave shawii | 25 | 9 | X | A | |||
| Agave sisalana | Hemp Plant | 25 | 9 | X | A | ||
| Agave striata | 15 | 8 | X | X | A | ||
| Agave utahensis | -10 | 6 | X | X | X | A | |
| Agave victoriae-reginae | Queen Victoria Agave | 10 | 7 | X | X | A | |
| Agave victoriae-reginae 'Compact' | 10 | 7 | X | X | A | ||
| Agave vilmoriniana | Octopus Agave | 20 | 9 | X | A | ||
| Agave weberi | Weber Agave | 10 | 7 | X | X | A | |
| Aloe barbadensis (A. vera) | Medicinal Aloe | 25 | 9 | X | A | ||
| Aloe camperi | 28 | 9 | X | A | |||
| Aloe dawei | Dawe’s Aloe | 25 | 9 | X | A | ||
| Aloe dichotoma | Kokerbom | 23 | 9 | X | A | ||
| Aloe ferox | Tree Aloe, Cape Aloe | 25 | 9 | X | A | ||
| Aloe hybrid 'Blue Elf' | 15 | 8 | X | X | A | ||
| Aloe marlothii | 25 | 9 | X | A | |||
| Aloe saponaria | African Aloe, Tiger Aloe | 15 | 8 | X | X | A | |
| Aloe sinkatana | 25 | 9 | X | A | |||
| Aloe spinosissima | Spider Aloe | 20 | 9 | X | A | ||
| Aloe variegata | Partridge Breast Aloe | 25 | 9 | X | A | ||
| Aloysia virgata | 10 | 8 | X | X | S | ||
| Ambrosia deltoidea | Triangleleaf Bursage | 20 | 9 | X | S | ||
| Ambrosia dumosa | White Bursage | 10 | 7 | X | X | S | |
| Amsonia grandiflora | Large-flowered Blue Star | -10 | 6 | X | X | X | P |
| Andropogon gerardii (Bothriochloa gerardii) | Big Bluestem | -20 | 5 | X | X | X | G |
| Andropogon scoparius (Schizachyrium scoparium) | Little Bluestem | -30 | 4 | X | X | X | G |
| Anemopsis californica | Yerba Mansa | -20 | 5 | X | X | X | P |
| Anisacanthus quadrifidus v. wrightii | Mexican Fire™ | 0 | 6 | X | X | X | S |
| Antigonon leptopus 'Baja Red' | Queen's Wreath | 20 | 9 | X | V | ||
| Aquilegia caerulea | Colorado Blue Columbine | -30 | 4 | X | X | X | P |
| Aquilegia chrysantha | Golden Columbine | -30 | 4 | X | X | X | P |
| Aristida purpurea | Purple Three Awn | -10 | 6 | X | X | X | G |
| Artemisia arborescens | Silvery Sagebrush | 25 | 9 | X | S | ||
| Artemisia filifolia | Sand Sage | -30 | 4 | X | X | S | |
| Artemisia frigida | Fringed Sage | -30 | 4 | X | X | S | |
| Artemisia ludoviciana | Prairie Sagebrush | -30 | 4 | X | X | X | S |
| Artemisia tridentata | Big Sagebrush | -20 | 5 | X | X | S | |
| Asclepias subulata | Desert Milkweed | 25 | 9 | X | A | ||
| Asclepias tuberosa | Butterfly Bush | -30 | 5 | X | X | S | |
| Atriplex canescens | Four Wing Saltbush | -30 | 4 | X | X | X | S |
| Atriplex hymenelytra | Desert Holly | 15 | 8 | X | X | S | |
| Atriplex lentiformis | Quailbush | 15 | 8 | X | X | S | |
| Atriplex nummularia | Old Man Saltbush | 15 | 8 | X | X | S | |
| Atriplex polycarpa | Desert Saltbush | 20 | 9 | X | S | ||
| Baccharis hybrid 'Starn'(P.P.#11240)Thompson™ | 0 | 6 | X | X | X | S | |
| Baccharis sarothroides (male) | Male Desert Broom | 10 | 7 | X | X | S | |
| Bahia absinthifolia | Bahia | 15 | 8 | X | X | P | |
| Baileya multiradiata | Desert Marigold | -10 | 6 | X | X | X | P |
| Bauhinia lunarioides ‘White’(B. congesta) | White Orchid Tree | 10 | 7 | X | X | T | |
| Bauhinia lunarioides 'Pink' (B. congesta) | Pink Orchid Tree | 10 | 7 | X | X | T | |
| Bauhinia mexicana | 15 | 8 | X | X | T | ||
| Bebbia juncea | Sweet Bush | 15 | 8 | X | X | S | |
| Berlandiera lyrata | Chocolate Flower | -30 | 4 | X | X | X | P |
| Bothriochloa barbinodis (Andropogon barbinodis) | Cane Bluestem | 10 | 7 | X | X | G | |
| Bougainvillea 'La Jolla' (bush) | 20 | 9 | X | S | |||
| Bouteloua curtipendula | Sideoats Grama | -30 | 4 | X | X | X | G |
| Bouteloua gracilis | Blue Grama | -30 | 3 | X | X | X | G |
| Buddleja davidii ‘Black Knight’ | Summer Lilac | -20 | 5 | X | X | S | |
| Buddleja marrubiifolia | Woolly Butterfly Bush | 0 | 7 | X | X | S | |
| Bulbine frutescens 'Hallmark' | Dwarf Orange Bulbine | 10 | 7 | X | X | GC | |
| Bulbine frutescens 'Yellow' | Shrubby Bulbine | 10 | 7 | X | X | GC | |
| Caesalpinia cacalaco | Cascalote | 20 | 9 | X | T | ||
| Caesalpinia gilliesii | Yellow Bird of Paradise | -10 | 5 | X | X | X | S |
| Caesalpinia mexicana | Mexican Bird of Paradise | 15 | 8 | X | X | S | |
| Caesalpinia paraguariensis | 25 | 9 | X | S | |||
| Caesalpinia platyloba | 25 | 9 | X | S | |||
| Caesalpinia pulcherrima | Red Bird of Paradise | 15 | 8 | X | X | S | |
| Callaeum liliacaena (Mascagnia liliacaena) | Purple Orchid Vine | 15 | 8 | X | X | V | |
| Callaeum macropterum (Mascagnia macroptera) | Yellow Orchid Vine | 25 | 9 | X | V | ||
| Calliandra californica | Red Baja Fairy Duster | 20 | 9 | X | S | ||
| Calliandra eriophylla | Pink Fairy Duster | 10 | 7 | X | X | S | |
| Calylophus hartwegii var. fendleri | Sundrops | 0 | 7 | X | X | X | GC |
| Carex pansa | California Meadow Sage | 15 | 8 | X | X | G | |
| Carex perdentata | Texas Meadow Sage | 0 | 7 | X | X | X | G |
| Carex tumulicola | Berkeley Sage | 15 | 8 | X | X | G | |
| Caryopteris x clandonensis 'Dark Knight' | Blue Mist | -30 | 4 | X | X | S | |
| Celtis occidentalis | Common Hackberry | -30 | 4 | X | X | X | T |
| Celtis pallida | Desert Hackberry | 10 | 7 | X | X | S | |
| Celtis reticulata | Canyon Hackberry | -20 | 5 | X | X | X | T |
| Cercis canadensis v. mexicana | Mexican Redbud | 0 | 6 | X | X | T | |
| Cercocarpus ledifolius | Curl Leaf Mountain Mahogany | -30 | 4 | X | X | S | |
| Cercocarpus montanus | Mountain Mahogany | -30 | 4 | X | X | S | |
| Cereus hildmannianus (Cereus peruvianus) | Hedge Cactus | 25 | 9 | X | A | ||
| Chamaebatiaria millefolium | Fernbush | -30 | 4 | X | X | S | |
| Chilopsis linearis | Desert Willow | -10 | 6 | X | X | X | T |
| Chilopsis linearis | Lucretia Hamilton™ | -10 | 6 | X | X | X | T |
| Chilopsis linearis | Warren Jones™ | 0 | 6 | X | X | X | T |
| Chitalpa 'Pink Dawn' | Chitalpa | 0 | 6 | X | X | X | T |
| Chrysactinia mexicana | Damianita | 0 | 6 | X | X | S | |
| Chrysothamnus viscidiflorus | Green Rabbitbrush | -40 | 3 | X | X | S | |
| Cissus trifoliata v. incisa | Grape Ivy | 20 | 9 | X | V | ||
| Condalia globosa | Bitter Condalia | 20 | 9 | X | S | ||
| Conoclinium greggii (Eupatorium greggii) | Boothill™ | 0 | 7 | X | X | X | P |
| Convolvulus cneorum | Bush Morning Glory | 15 | 8 | X | X | S | |
| Cordia boissieri | Mexican Olive | 20 | 9 | X | T | ||
| Cordia parvifolia | Little Leaf Cordia | 15 | 8 | X | X | S | |
| Cortaderia selloana 'Pumila' | Dwarf Pampas Grass | 0 | 6 | X | X | X | G |
| Coursetia glandulosa | Baby Bonnets | 20 | 9 | X | S | ||
| Cuphea llavea | Bat-faced Cuphea | 20 | 9 | X | P | ||
| Cupressus arizonica | Arizona Cypress | -15 | 5 | X | X | X | T |
| Cupressus arizonica ‘Blue Ice’ | -15 | 5 | X | X | X | T | |
| Cupressus arizonica ‘Compacta’ | -15 | 5 | X | X | X | T | |
| Dalbergia sissoo | Rosewood | 30 | 9 | X | T | ||
| Dalea bicolor v. bicolor | Monterrey Blue™ | 10 | 7 | X | X | S | |
| Dalea capitata | Sierra Gold™ | 0 | 6 | X | X | GC | |
| Dalea frutescens | Sierra Negra™ | 0 | 6 | X | X | S | |
| Dalea greggii | Trailing Indigo Bush | 10 | 7 | X | X | GC | |
| Dalea pulchra | Indigo Bush | 15 | 8 | X | X | S | |
| Dalea purpurea (Petalostemum purpureum) | Purple Prairieclover | -40 | 3 | X | X | P | |
| Dalea versicolor v. sessilis | Mountain Delight™ | 10 | 7 | X | X | S | |
| Dasylirion leiophyllum | Green Desert Spoon, Sotol | 10 | 7 | X | X | X | A |
| Dasylirion quadrangulatum (D. longissimum) | Toothless Desert Spoon | 15 | 8 | X | X | A | |
| Dasylirion texanum | Green Desert Spoon, Sotol | -20 | 5 | X | X | X | A |
| Dasylirion wheeleri | Grey Desert Spoon, Sotol | 0 | 6 | X | X | X | A |
| Dicliptera resupinata | Native Dicliptera | 15 | 8 | X | X | P | |
| Dodonaea viscosa | Hop Bush | 15 | 8 | X | X | S | |
| Drosanthemum speciosum 'Rosea' | Iceplant | 20 | 9 | X | GC | ||
| Duranta erecta 'Sweet Memory' | 10 | 7 | X | X | S | ||
| Ebenopsis ebano (Pithecellobium flexicaule) | Texas Ebony | 10 | 7 | X | X | T | |
| Echinacea purpurea | Purple Coneflower | -40 | 3 | X | X | P | |
| Encelia farinosa | Brittlebush | 15 | 8 | X | X | S | |
| Encelia frutescens | Green Brittlebush | -10 | 6 | X | X | X | S |
| Ephedra nevadensis | Mormon Tea | 0 | 7 | X | X | A | |
| Ephedra viridis | Mormon Tea | -20 | 5 | X | X | A | |
| Epilobium californica (Zauschneria c.) 'Catalina' | 10 | 7 | X | X | P | ||
| Eremophila hybrid | Summertime Blue™ | 25 | 9 | X | S | ||
| Eremophila laanii 'Pink Beauty' | Emu Bush | 25 | 9 | X | S | ||
| Eremophila maculata | Valentine™ | 20 | 8 | X | X | S | |
| Eremophila maculata | Winter Gold™ | 25 | 9 | X | S | ||
| Eremophila racemosa ‘Bicolor’ | Easter Egg Plant | 25 | 9 | X | S | ||
| Ericameria laricifolia | Aguirre™ | -10 | 6 | X | X | X | S |
| Ericameria laricifolia 'Desert Mountain' | Turpentine Bush | 15 | 8 | X | X | S | |
| Ericameria nauseosua v. speciosus (Chrysothamnus) | Whitestem Chamisa | -40 | 3 | X | X | S | |
| Ericameria nauseosus v. nauseosus (Chrysothamnus) | Dwarf Chamisa | -30 | 4 | X | X | S | |
| Erigeron divergens | Native Fleabane | -10 | 6 | ||||