Hardiness of hardy cactus and other succulents

How hardy are the Cactus and other hardy succulents?

For hardiness on Yucca please look here: "Benny's Yucca page; Yucca hardiness"

The hardiness-list is based on cultivation in Northern Denmark. In other climates the hardiness might be different. If you want to know how the climate is in Northern Denmark, you can look at my "climate page", or visit Netscape's weather page so you can see how the current weather situation is 50 KM south of here, the city Aalborg is near the largest Fjord in Denmark, so this place may be a little warmer and wetter than up here.

The list is not a complete list of hardy Cactus and other hardy succulents, but are based on what I have had success with in my area!

Hardiness:
This is for mature plants in good health and culture (it's very important that the soil is quite dry, before the plants are exposed to frost!!)

14 - No frost at all, fatal, keep above 5C.
15 - Occasional light frost, at night down to -2C, during the day above 5C.
16 - Frequent moderate frost, at night down to -7C, during the day above 5C.
17 - Very frost hardy, at night down to -12C, during the day above 0C.
18 - Often snow-covered, safe down to -20C, can withstand temperatures below freezing for a long period of time!
19 - Hardy in the garden here in Denmark
19-20 Hardy in the garden here in Denmark, if the plant is protected against winter moisture with a sheet of glass! will do very well in a frame that are covered during the winter.
20 - Hardy in the garden here in Denmark, if the bed is protected against winter moisture!
20-21 Not hardy in the here in Denmark, but if grown in pots that are outside from late April to mid September and stored dry inside an unheated greenhouse in the winter, or planted inside an unheated greenhouse.
21 - Hardy in an unheated greenhouse here in Denmark. (in pots or planted in a well drained bed).
22 - Not very hardy, but can be grown in large pots, that are outside in the summer, and are stored dry and frost free during the winter.

The links will take you to a picture of the plant in the photo gallery.

Genus: Species: cultivation type: hardiness Notes:

Agave lechuguilla 21 16 in a well drained bed

Agave havardiana 21 17 in a well drained bed

Agave parryi 21 17 in a well drained bed

Agave parryi var. neomexicana 21 17 in a well drained bed

Agave utahensis var. eborispina 21 17 in a well drained bed

Agave utahensis var. kaibabensis 20 18 in a well drained bed

Agave utahensis var. nevadensis 21 17 in a well drained bed

Agave utahensis var. utahensis 21 17 in a well drained bed

Aloinopsis spathulata 21 17 in a well drained bed

Austrocactrus gracilis 21 17 in a well drained bed

Chamaecereus silvestrii 21 17 in a well drained bed

Coryphantha echinus 21 16-17 in pots

Crassula milfordiae 19-20 18 in a well drained bed or pots in a frame

Cylindropuntia davisii 20 18 in pots

Cylindropuntia echinocarpa 21 17

Cylindropuntia imbricata var. arborescens 20 18

Cylindropuntia imbricata var. arborescens 'Cristata' 20 18

Cylindropuntia imbricata var. arborescens 'Red Tower' 20 18

Cylindropuntia imbricata var. arborescens 'White Tower' 20 18

Cylindropuntia imbricata var. arborescens forma albiflora 20 18

Cylindropuntia kleiniae 21 18

Cylindropuntia leptocaulis 21 18

Cylindropuntia spinosior 21 17

Cylindropuntia viridiflora 20 18

Cylindropuntia whipplei 21 18

Cylindropuntia whipplei forma minor 21 18

Cylindropuntia whipplei var. montana (name invalid) 21 18

Delosperma cooperi 19 18

Delosperma nubrigenum HORT 20 18

Delosperma nubrigenum 20 18

Delosperma sp. ' white flowers ' 21 18

Drosanthemum hispidum ? ?

Echinocactus xeranthemoides ? ?

Echinocereus albispinus 21 18

Echinocereus baileyi

Echinocereus caespitosus 20 18

Echinocereus caespitosus var. castaneus 21 18

Echinocereus chloranthus 21 18

Echinocereus chloranthus var. cylindricus 21 18

Echinocereus chloranthus var. cylindricus forma correllii 21 18

Echinocereus chloranthus var. russanthus 21 18

Echinocereus coccineus 20 18

Echinocereus coccineus var. gurneyi 20 18

Echinocereus coccineus var. paucispinus 21 18

Echinocereus dasyacanthus 21 18

Echinocereus davisii 21 18

Echinocereus fendleri 21 18

Echinocereus fendleri var. kuenzleri 21-22 16

Echinocereus fendleri var. rectispinus 21 18

Echinocereus ledingii 21 17

Echinocereus reichenbachii 'Oklahomensis' = caespitosus 21 18

Echinocereus reichenbachii var. albispinus = Echinocereus albispinus 21 18

Echinocereus reichenbachii var. baileyi = Echinocereus baileyi 20 18

Echinocereus reichenbachii var. perbellus 21 18

Echinocereus roemeri 21 18

Echinocereus rosei 21 18

Echinocereus triglochidiatus 19-20 18

Echinocereus triglochidiatus 'Sub Nudus' 21 18

Echinocereus triglochidiatus f. inermis 19-20 18

Echinocereus triglochidiatus var. arizonicus 21 18

Echinocereus triglochidiatus var. gonacanthus 20 18

Echinocereus triglochidiatus var. gurneyi 20 18

Echinocereus triglochidiatus var. melanacanthus 20 18

Echinocereus triglochidiatus var. mojavensis 19-20 18

Echinocereus triglochidiatus var. mojavensis forma inermis 19-20 18

Echinocereus viridiflorus 19-20 18

Echinocereus viridiflorus ' Spinosior ' 20 18

Echinocereus X caespitosus X triglochidiatus 'Sub Nudus' F:1 hybrid ?

Echinocereus X coccineus X viridiflorus F:1 hybrid ?

Echinocereus X fendleri X triglochidiatus 'Sub Nudus' F:1 hybrid ?

Echinocereus X roetteri ?

Echinocereus X triglochidiatus var. mojavensis X rosei F:1 hybrid ?

Echinocereus X triglochidiatus var. mojavensis X reichenbachii var. albispinus F:1 hybrid ?

Echinocereus X viridiflorus X coccineus F:1 hybrid ?

Echinocereus X viridiflorus X triglochidiatus var. mojavensis F:1 hybrid ?

Echinomastus dasyacanthus 21 17

Escobaria minima 21 (20) 17-18

Escobaria missouriensis 21 18

Escobaria missouriensis ssp. navajoensis 21 17

Escobaria missouriensis var. caespitosa 21 18

Escobaria sneedii 20 18

Escobaria vivipara 20 18

Escobaria vivipara var. arizonica 20 18

Escobaria vivipara var. bisbeana 21 18

Escobaria vivipara var. kaibabensis 21 18

Escobaria vivipara var. neomexicana 20 18

Escobaria X vivipara var. neomexicana X missouriensis F:1 hybrid ? ?

Escobaria X vivipara var. arizonica X missouriensis F:1 hybrid ? ?

Escobaria X vivipara var. arizonica X missouriensis F:1 hybrid ? ?

Ferocactus hamatacanthus 22 16

Ferocactus wislizenii 22 16

Grusonia clavata 21 18

Grusonia pulchella 21 18

Gymnocalysium bruchii 21 17

Gymnocalysium

Gymnocalysium gibosum var., nigrum 21 17

Hesperaloe parviflora 21 ?

Jovibarba arenaria 19 18

Jovibarba hirta ssp. glabrescens 19 18

Lewisia brachycalyx 19 18

Lewisia columbiana 19 18

Lewisia columbiana ssp. rupicola 19 18

Lewisia columbiana ssp. rupicola ' Rosea ' 19 18

Lewisia congdonii 19 18

Lewisia cotyledon 19 18

Lewisia cotyledon forma alba 19 18

Lewisia cotyledon ssp. heckneri 19 18

Lewisia longipetala 19 18

Lewisia nevadensis 19 18

Lewisia oppositifolia ' Dwarf form ' 19 18

Lewisia pygmaea 19 18

Lewisia rediviva 19 18

Lewisia sierrae 19 18

Lewisia tweedyi 19-20 18

Maihuenia patagonica 21 18

Maihuenia poeppegii 20 18

Maihuenia tehuelches = patagonica 21 18

Maihuenopsis darwinii 21 18

Mammillaria heyderi var. applanata 21 17

Mammillaria meiacantha 21 17-18 mine died after a wet winter with high humidity

Mammillaria wrightii 21 17-18

Mammillaria wrightii var. wilcoxii 21 17

Manfreda virginica ? ?

Navajoa maia 21 18

Navajoa peeblesianus 'Maja' 21 18

Navajoa peeblesianus ssp. fickeisenii 21 18

Navajoa peeblesianus var. menzelii 21 18

Neolloidia johnsonii var. lutescens 21 17

Opuntia 'Apache' 19-20 18

Opuntia 'Budapest' 19 18

Opuntia 'Claude Arno' 19-20 18

Opuntia 'Flora Rosea' 19-20 18

Opuntia 'Georg Sydow' 19-20 18

Opuntia 'Haestrup ' 19 18

Opuntia 'Rutilans' 19 18

Opuntia 'Smithwick' 19 18

Opuntia 'Super Rutila' 19-20 18

Opuntia arenaria 21 18

Opuntia aurea 20 18

Opuntia aurea forma nicholii 21 18

Opuntia basilaris 21 18

Opuntia basilaris var. brachyclada 21 18

Opuntia basilaris var. heilii ? 21 18

Opuntia basilaris var. longiareolata 21 18

Opuntia basilaris var. ramosa 21 18

Opuntia basilaris var. woodburyi = O. aurea 21 18

Opuntia cymochila 20 18

Opuntia cymochila ' Malpais Glory ' 20 18

Opuntia decumbens 21 18

Opuntia drumondii 21 18

Opuntia engelmanii var. cyclodes 20 18

Opuntia fragilis ' brooksii' 19 18

Opuntia fragilis 'Bronze Beauty ' 19-20 18

Opuntia fragilis 'Devil Thumb' 19-20 18

Opuntia fragilis 'Little Grey Mound' 19-20 18

Opuntia fragilis 'Smørblomst' 19 18

Opuntia fragilis "Wenatchee" 19-20 18

Opuntia fragilis forma brachycantha 19-20 18

Opuntia fragilis forma caespitosa 19-20 18

Opuntia fragilis forma denudata 19-20 18

Opuntia fragilis forma denudata PINK 19-20 18

Opuntia fragilis var. fragilis 19 18

Opuntia fragilis var. fragilis ' b' 19-20 18

Opuntia fragilis X polyacantha 19-20 18

Opuntia gilvescens 19-20 18

Opuntia grandiflora 21 18

Opuntia humifusa 19 18

Opuntia humifusa 'NKS 130' 19 18

Opuntia humifusa mini form ? 18

Opuntia humifusa var. pollardii 19-20 18

Opuntia littoralis var. martiniana 19-20 18

Opuntia loomisii 20 18

Opuntia mackensenii 20 18

Opuntia macrocentra var. castatteri 21 17

Opuntia macrorhiza 19 18

Opuntia macrorhiza var. spaerocarpa 19-20 18

Opuntia macrorhiza var. stenochila 19-20 18

Opuntia phaeacantha 19-20 18

Opuntia phaeacantha 'Plum' 19-20 18

Opuntia phaeacantha 'Rubrispina' 19-20 18

Opuntia phaeacantha var. ' Arenacea ' 19-20 18

Opuntia phaeacantha var. ' Major ' 19-20 18

Opuntia phaeacantha var. ' Sylvatica ' 19-20 18

Opuntia phaeacantha var. camanchica 19-20 18

Opuntia phaeacantha var. camanchica f. albispina ? 19-20 18

Opuntia phaeacantha var. gigantea 19-20 18

Opuntia phaeacantha var. longispina 19-20 18

Opuntia phaeacantha var. major 19-20 18

Opuntia phaeacantha var. nigricans 19-20 18

Opuntia phaeacantha var. paucispina 19-20 18

Opuntia phaeacantha var. pierci 19-20 18

Opuntia phaeacantha var. rubra 19-20 18

Opuntia phaeacantha var. tenuispina 19-20 18

Opuntia polyacantha ' Carmin ' 19 18

Opuntia polyacantha ' Chartreuse' 19-20 18

Opuntia polyacantha ' X200 Baby ' 19-20 18

Opuntia polyacantha 'Colorado Red' 19-20 18

Opuntia polyacantha 'Crystal Tide' 19-20 18

Opuntia polyacantha 'Orange Glory' 20 18

Opuntia polyacantha 'Orange Nebraska' 19-20 18

Opuntia polyacantha 'Red Glory' 20 18

Opuntia polyacantha 'Utah Sunset' 20 18

Opuntia polyacantha var. erinacea 19-20 18

Opuntia polyacantha var. erinacea 'Red spine Grizzly Bear' 19-20 18

Opuntia polyacantha var. erinacea forma ursina 21 18

Opuntia polyacantha var. hystricina 19-20 18

Opuntia polyacantha var. hystricina ' Roseiflora ' 19-20 18

Opuntia polyacantha var. hystricina ' Rubrispina ' 19-20 18

Opuntia polyacantha var. hystricina ' Porcupine ' 19-20 18

Opuntia polyacantha var. juniperina 19-20 18

Opuntia polyacntha var. polyacantha

Opuntia polyacantha var. rhodantha 19-20 18

Opuntia polyacantha var. rhodantha 'Greenhorn' 19-20 18

Opuntia polyacantha var. rhodantha 'Purple Knight ' 19-20 18

Opuntia polyacantha var. rhodantha 'xanthostemma elegans' 19-20 18

Opuntia polyacantha var. rhodantha 'xanthostemma Jena' 19-20 18

Opuntia polyacantha var. rhodantha cv. pisciformis 19-20 18

Opuntia polyacantha var. rhodantha cv. shumaniana 19-20 18

Opuntia polyacantha var. rhodantha cv. rosea 19-20 18

Opuntia polyacantha var. rhodantha cv. xanthostemma rosea 19-20 18

Opuntia polyacantha var. rufispina = var. polyacantha 19 18

Opuntia polyacantha var. schweriana 19-20 18

Opuntia polyacantha var. utahensis 19-20 18

Opuntia polyacantha X fragilis 19-20 18

Opuntia pottsii 19-20 18

Opuntia pottsii var. montana 19-20 18

Opuntia pottsii X phaeacantha 19-20 18

Opuntia pusilla 21 18

Opuntia rutila 19-20 18

Opuntia sandiana 21 18

Opuntia sanguinicula 21 17

Opuntia santa rita 21 17

Opuntia sp. nov. (from CO, SD & NB) (O. ogallalae, name not published yet!) 19-20 18 HUGE flowers!

Opuntia stanleyi 21 17

Opuntia tardospina 19-20 18

Opuntia tortispina 19 18

Opuntia tortispina ' Dwarf form ' 19-20 18

Opuntia trichophora 19-20 18

Opuntia trichophora nova 19-20 18

Opuntia woodsii 20 18

Opuntia xcolumbiana 19-20 18

Opuntia xanthostemma 'Rosea' = polyacantha var. rhodantha cv. xanthostemma rosea 19-20 18

Opuntia zuniensis 19-20 18

Orostachys furysii 20 18

Orostachys iwargenge 19-20 18

Orostachys spinosa 19-20 18

Pediocactus bradyi 21 18

Pediocactus bradyi ssp. despainii 21 18

Pediocactus bradyi ssp. winkleri 21 18

Pediocactus nigrispinus ssp nigrispinus 21 18

Pediocactus paradinei 21 18

Pediocactus sileri 21 18

Pediocactus simpsonii 21 18

Pediocactus simpsonii f. campestris 21 18

Pediocactus simpsonii f. dinosauriensis 21 18

Pediocactus simpsonii f. flaminggorgensis 21 18

Pediocactus simpsonii f. kuenzleri 21 18

Pediocactus simpsonii f. montanus 21 18

Pediocactus simpsonii ssp. bensonii 21 18

Pediocactus simpsonii ssp. campestris 21 18

Pediocactus simpsonii ssp. idahoensis 21 18

Pediocactus simpsonii ssp. indraianus 21 18

Pediocactus simpsonii ssp. robustior 21 18

Pediocactus simpsonii ssp. simpsonii 21 18

Phemeranthus confertiflorus 20 18

Phemeranthus sediforme 19 18

Phemeranthus spirescens 19-20 18

Phemeranthus validulus 21 17

Polianthes virginica ? ?

Rhodiola algida 19 18

Rhodiola arctica 19 18

Rhodiola semenowii 19 18

Sclerocactus parviflorus 21 18

Sclerocactus pubispinus 21 18

Sclerocactus wetlandicus ssp. ilseae 21 18

Sclerocactus whipplei 21 18

Sclerocactus wrightiae 21 18

Sedum acre 19 18

Sedum album 19 18

Sedum anacamperos 19 18

Sedum bupleuroides 19 18

Sedum cauticolum 19 18

Sedum dasyphyllum 19 18

Sedum dasyphyllum var. microphyllum 19 18

Sedum divergens 19 18

Sedum kamtschaticum f. variegata 19 18

Sedum lanseolatum 19 18

Sedum minimum 19 18

Sedum oreganum var. procumbens 19 18

Sedum pachyclados 19 18

Sedum reflexum 19 18

Sedum reflexum f. cristata 19 18

Sedum reflexum variegata cristata 19 18

Sedum spathulifolium 19 18

Sedum spurium 19 18

Sedum tartarinowii 19 18

Sedum telephium 19 18

Sempervivum ' Alpha ' 19 18

Sempervivum ' Beta ' 19 18

Sempervivum ' Cleveland ' 19 18

Sempervivum ' Director Jacobs ' 19 18

Sempervivum ' Gamma ' 19 18

Sempervivum ' Grey Ladies ' 19 18

Sempervivum ' Majlands Hybrid ' 19 18

Sempervivum ' Red & Green ' f. cristata 19 18

Sempervivum ' Red & Green ' 19 18

Sempervivum ' Rose Agnes ' 19 18

Sempervivum ' Thomayeri ' 19 18

Sempervivum ' Westelin ' 19 18

Sempervivum 'Limelight' 19 18

Sempervivum 'Rosie' 19 18

Sempervivum allionii 19 18

Sempervivum arachnoideum 19 18

Sempervivum arachnoideum v. tomentosum 19 18

Sempervivum ballsii 19 18

Sempervivum calcareum 19 18

Sempervivum dzhavachischvilii 19 18

Sempervivum kosanii 19 18

Sempervivum mamoreum var. dinaricum 19 18

Sempervivum montanum var. stiriacum 19 18

Sempervivum pseudoornatum 19 18

Sempervivum reginae-amaliae 19 18

Sempervivum rubrifolium 19 18

Sempervivum schnittspahnii 19 18

Sempervivum settilum rubrifolium 19 18

Sempervivum vicentei 19 18

Sempervivum violaceum 19 18

Sempervivum x barbululatum cv. hookeri 19 18

Tephrocactus articulatus 21 17

Tephrocactus haematacantha 21 17

Tephrocactus verschaffeldtii 21 17

Toumeya papyracantha 21 18

Yucca look at "Benny's Yucca page; Yucca hardiness"

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Genus:	Species:	cultivation type:	hardiness	Notes:
Agave	lechuguilla	21	16	in a well drained bed
Agave	havardiana	21	17	in a well drained bed
Agave	parryi	21	17	in a well drained bed
Agave	parryi var. neomexicana	21	17	in a well drained bed
Agave	utahensis var. eborispina	21	17	in a well drained bed
Agave	utahensis var. kaibabensis	20	18	in a well drained bed
Agave	utahensis var. nevadensis	21	17	in a well drained bed
Agave	utahensis var. utahensis	21	17	in a well drained bed
Aloinopsis	spathulata	21	17	in a well drained bed
Austrocactrus	gracilis	21	17	in a well drained bed
Chamaecereus	silvestrii	21	17	in a well drained bed
Coryphantha	echinus	21	16-17	in pots
Crassula	milfordiae	19-20	18	in a well drained bed or pots in a frame
Cylindropuntia	davisii	20	18	in pots
Cylindropuntia	echinocarpa	21	17
Cylindropuntia	imbricata var. arborescens	20	18
Cylindropuntia	imbricata var. arborescens 'Cristata'	20	18
Cylindropuntia	imbricata var. arborescens 'Red Tower'	20	18
Cylindropuntia	imbricata var. arborescens 'White Tower'	20	18
Cylindropuntia	imbricata var. arborescens forma albiflora	20	18
Cylindropuntia	kleiniae	21	18
Cylindropuntia	leptocaulis	21	18
Cylindropuntia	spinosior	21	17
Cylindropuntia	viridiflora	20	18
Cylindropuntia	whipplei	21	18
Cylindropuntia	whipplei forma minor	21	18
Cylindropuntia	whipplei var. montana (name invalid)	21	18
Delosperma	cooperi	19	18
Delosperma	nubrigenum HORT	20	18
Delosperma	nubrigenum	20	18
Delosperma	sp. ' white flowers '	21	18
Drosanthemum	hispidum	?	?
Echinocactus	xeranthemoides	?	?
Echinocereus	albispinus	21	18
Echinocereus	baileyi
Echinocereus	caespitosus	20	18
Echinocereus	caespitosus var. castaneus	21	18
Echinocereus	chloranthus	21	18
Echinocereus	chloranthus var. cylindricus	21	18
Echinocereus	chloranthus var. cylindricus forma correllii	21	18
Echinocereus	chloranthus var. russanthus	21	18
Echinocereus	coccineus	20	18
Echinocereus	coccineus var. gurneyi	20	18
Echinocereus	coccineus var. paucispinus	21	18
Echinocereus	dasyacanthus	21	18
Echinocereus	davisii	21	18
Echinocereus	fendleri	21	18
Echinocereus	fendleri var. kuenzleri	21-22	16
Echinocereus	fendleri var. rectispinus	21	18
Echinocereus	ledingii	21	17
Echinocereus	reichenbachii 'Oklahomensis' = caespitosus	21	18
Echinocereus	reichenbachii var. albispinus = Echinocereus albispinus	21	18
Echinocereus	reichenbachii var. baileyi = Echinocereus baileyi	20	18
Echinocereus	reichenbachii var. perbellus	21	18
Echinocereus	roemeri	21	18
Echinocereus	rosei	21	18
Echinocereus	triglochidiatus	19-20	18
Echinocereus	triglochidiatus 'Sub Nudus'	21	18
Echinocereus	triglochidiatus f. inermis	19-20	18
Echinocereus	triglochidiatus var. arizonicus	21	18
Echinocereus	triglochidiatus var. gonacanthus	20	18
Echinocereus	triglochidiatus var. gurneyi	20	18
Echinocereus	triglochidiatus var. melanacanthus	20	18
Echinocereus	triglochidiatus var. mojavensis	19-20	18
Echinocereus	triglochidiatus var. mojavensis forma inermis	19-20	18
Echinocereus	viridiflorus	19-20	18
Echinocereus	viridiflorus ' Spinosior '	20	18
Echinocereus	X caespitosus X triglochidiatus 'Sub Nudus' F:1 hybrid	?
Echinocereus	X coccineus X viridiflorus F:1 hybrid	?
Echinocereus	X fendleri X triglochidiatus 'Sub Nudus' F:1 hybrid	?
Echinocereus	X roetteri	?
Echinocereus	X triglochidiatus var. mojavensis X rosei F:1 hybrid	?
Echinocereus	X triglochidiatus var. mojavensis X reichenbachii var. albispinus F:1 hybrid	?
Echinocereus	X viridiflorus X coccineus F:1 hybrid	?
Echinocereus	X viridiflorus X triglochidiatus var. mojavensis F:1 hybrid	?
Echinomastus	dasyacanthus	21	17
Escobaria	minima	21 (20)	17-18
Escobaria	missouriensis	21	18
Escobaria	missouriensis ssp. navajoensis	21	17
Escobaria	missouriensis var. caespitosa	21	18
Escobaria	sneedii	20	18
Escobaria	vivipara	20	18
Escobaria	vivipara var. arizonica	20	18
Escobaria	vivipara var. bisbeana	21	18
Escobaria	vivipara var. kaibabensis	21	18
Escobaria	vivipara var. neomexicana	20	18
Escobaria	X vivipara var. neomexicana X missouriensis F:1 hybrid	?	?
Escobaria	X vivipara var. arizonica X missouriensis F:1 hybrid	?	?
Escobaria	X vivipara var. arizonica X missouriensis F:1 hybrid	?	?
Ferocactus	hamatacanthus	22	16
Ferocactus	wislizenii	22	16
Grusonia	clavata	21	18
Grusonia	pulchella	21	18
Gymnocalysium	bruchii	21	17
Gymnocalysium
Gymnocalysium	gibosum var., nigrum	21	17
Hesperaloe	parviflora	21	?
Jovibarba	arenaria	19	18
Jovibarba	hirta ssp. glabrescens	19	18
Lewisia	brachycalyx	19	18
Lewisia	columbiana	19	18
Lewisia	columbiana ssp. rupicola	19	18
Lewisia	columbiana ssp. rupicola ' Rosea '	19	18
Lewisia	congdonii	19	18
Lewisia	cotyledon	19	18
Lewisia	cotyledon forma alba	19	18
Lewisia	cotyledon ssp. heckneri	19	18
Lewisia	longipetala	19	18
Lewisia	nevadensis	19	18
Lewisia	oppositifolia ' Dwarf form '	19	18
Lewisia	pygmaea	19	18
Lewisia	rediviva	19	18
Lewisia	sierrae	19	18
Lewisia	tweedyi	19-20	18
Maihuenia	patagonica	21	18
Maihuenia	poeppegii	20	18
Maihuenia	tehuelches = patagonica	21	18
Maihuenopsis	darwinii	21	18
Mammillaria	heyderi var. applanata	21	17
Mammillaria	meiacantha	21	17-18	mine died after a wet winter with high humidity
Mammillaria	wrightii	21	17-18
Mammillaria	wrightii var. wilcoxii	21	17
Manfreda	virginica	?	?
Navajoa	maia	21	18
Navajoa	peeblesianus 'Maja'	21	18
Navajoa	peeblesianus ssp. fickeisenii	21	18
Navajoa	peeblesianus var. menzelii	21	18
Neolloidia	johnsonii var. lutescens	21	17
Opuntia	'Apache'	19-20	18
Opuntia	'Budapest'	19	18
Opuntia	'Claude Arno'	19-20	18
Opuntia	'Flora Rosea'	19-20	18
Opuntia	'Georg Sydow'	19-20	18
Opuntia	'Haestrup '	19	18
Opuntia	'Rutilans'	19	18
Opuntia	'Smithwick'	19	18
Opuntia	'Super Rutila'	19-20	18
Opuntia	arenaria	21	18
Opuntia	aurea	20	18
Opuntia	aurea forma nicholii	21	18
Opuntia	basilaris	21	18
Opuntia	basilaris var. brachyclada	21	18
Opuntia	basilaris var. heilii ?	21	18
Opuntia	basilaris var. longiareolata	21	18
Opuntia	basilaris var. ramosa	21	18
Opuntia	basilaris var. woodburyi = O. aurea	21	18
Opuntia	cymochila	20	18
Opuntia	cymochila ' Malpais Glory '	20	18
Opuntia	decumbens	21	18
Opuntia	drumondii	21	18
Opuntia	engelmanii var. cyclodes	20	18
Opuntia	fragilis ' brooksii'	19	18
Opuntia	fragilis 'Bronze Beauty '	19-20	18
Opuntia	fragilis 'Devil Thumb'	19-20	18
Opuntia	fragilis 'Little Grey Mound'	19-20	18
Opuntia	fragilis 'Smørblomst'	19	18
Opuntia	fragilis "Wenatchee"	19-20	18
Opuntia	fragilis forma brachycantha	19-20	18
Opuntia	fragilis forma caespitosa	19-20	18
Opuntia	fragilis forma denudata	19-20	18
Opuntia	fragilis forma denudata PINK	19-20	18
Opuntia	fragilis var. fragilis	19	18
Opuntia	fragilis var. fragilis ' b'	19-20	18
Opuntia	fragilis X polyacantha	19-20	18
Opuntia	gilvescens	19-20	18
Opuntia	grandiflora	21	18
Opuntia	humifusa	19	18
Opuntia	humifusa 'NKS 130'	19	18
Opuntia	humifusa mini form	?	18
Opuntia	humifusa var. pollardii	19-20	18
Opuntia	littoralis var. martiniana	19-20	18
Opuntia	loomisii	20	18
Opuntia	mackensenii	20	18
Opuntia	macrocentra var. castatteri	21	17
Opuntia	macrorhiza	19	18
Opuntia	macrorhiza var. spaerocarpa	19-20	18
Opuntia	macrorhiza var. stenochila	19-20	18
Opuntia	phaeacantha	19-20	18
Opuntia	phaeacantha 'Plum'	19-20	18
Opuntia	phaeacantha 'Rubrispina'	19-20	18
Opuntia	phaeacantha var. ' Arenacea '	19-20	18
Opuntia	phaeacantha var. ' Major '	19-20	18
Opuntia	phaeacantha var. ' Sylvatica '	19-20	18
Opuntia	phaeacantha var. camanchica	19-20	18
Opuntia	phaeacantha var. camanchica f. albispina ?	19-20	18
Opuntia	phaeacantha var. gigantea	19-20	18
Opuntia	phaeacantha var. longispina	19-20	18
Opuntia	phaeacantha var. major	19-20	18
Opuntia	phaeacantha var. nigricans	19-20	18
Opuntia	phaeacantha var. paucispina	19-20	18
Opuntia	phaeacantha var. pierci	19-20	18
Opuntia	phaeacantha var. rubra	19-20	18
Opuntia	phaeacantha var. tenuispina	19-20	18
Opuntia	polyacantha ' Carmin '	19	18
Opuntia	polyacantha ' Chartreuse'	19-20	18
Opuntia	polyacantha ' X200 Baby '	19-20	18
Opuntia	polyacantha 'Colorado Red'	19-20	18
Opuntia	polyacantha 'Crystal Tide'	19-20	18
Opuntia	polyacantha 'Orange Glory'	20	18
Opuntia	polyacantha 'Orange Nebraska'	19-20	18
Opuntia	polyacantha 'Red Glory'	20	18
Opuntia	polyacantha 'Utah Sunset'	20	18
Opuntia	polyacantha var. erinacea	19-20	18
Opuntia	polyacantha var. erinacea 'Red spine Grizzly Bear'	19-20	18
Opuntia	polyacantha var. erinacea forma ursina	21	18
Opuntia	polyacantha var. hystricina	19-20	18
Opuntia	polyacantha var. hystricina ' Roseiflora '	19-20	18
Opuntia	polyacantha var. hystricina ' Rubrispina '	19-20	18
Opuntia	polyacantha var. hystricina ' Porcupine '	19-20	18
Opuntia	polyacantha var. juniperina	19-20	18
Opuntia	polyacntha var. polyacantha
Opuntia	polyacantha var. rhodantha	19-20	18
Opuntia	polyacantha var. rhodantha 'Greenhorn'	19-20	18
Opuntia	polyacantha var. rhodantha 'Purple Knight '	19-20	18
Opuntia	polyacantha var. rhodantha 'xanthostemma elegans'	19-20	18
Opuntia	polyacantha var. rhodantha 'xanthostemma Jena'	19-20	18
Opuntia	polyacantha var. rhodantha cv. pisciformis	19-20	18
Opuntia	polyacantha var. rhodantha cv. shumaniana	19-20	18
Opuntia	polyacantha var. rhodantha cv. rosea	19-20	18
Opuntia	polyacantha var. rhodantha cv. xanthostemma rosea	19-20	18
Opuntia	polyacantha var. rufispina = var. polyacantha	19	18
Opuntia	polyacantha var. schweriana	19-20	18
Opuntia	polyacantha var. utahensis	19-20	18
Opuntia	polyacantha X fragilis	19-20	18
Opuntia	pottsii	19-20	18
Opuntia	pottsii var. montana	19-20	18
Opuntia	pottsii X phaeacantha	19-20	18
Opuntia	pusilla	21	18
Opuntia	rutila	19-20	18
Opuntia	sandiana	21	18
Opuntia	sanguinicula	21	17
Opuntia	santa rita	21	17
Opuntia	sp. nov. (from CO, SD & NB) (O. ogallalae, name not published yet!)	19-20	18	HUGE flowers!
Opuntia	stanleyi	21	17
Opuntia	tardospina	19-20	18
Opuntia	tortispina	19	18
Opuntia	tortispina ' Dwarf form '	19-20	18
Opuntia	trichophora	19-20	18
Opuntia	trichophora nova	19-20	18
Opuntia	woodsii	20	18
Opuntia	xcolumbiana	19-20	18
Opuntia	xanthostemma 'Rosea' = polyacantha var. rhodantha cv. xanthostemma rosea	19-20	18
Opuntia	zuniensis	19-20	18
Orostachys	furysii	20	18
Orostachys	iwargenge	19-20	18
Orostachys	spinosa	19-20	18
Pediocactus	bradyi	21	18
Pediocactus	bradyi ssp. despainii	21	18
Pediocactus	bradyi ssp. winkleri	21	18
Pediocactus	nigrispinus ssp nigrispinus	21	18
Pediocactus	paradinei	21	18
Pediocactus	sileri	21	18
Pediocactus	simpsonii	21	18
Pediocactus	simpsonii f. campestris	21	18
Pediocactus	simpsonii f. dinosauriensis	21	18
Pediocactus	simpsonii f. flaminggorgensis	21	18
Pediocactus	simpsonii f. kuenzleri	21	18
Pediocactus	simpsonii f. montanus	21	18
Pediocactus	simpsonii ssp. bensonii	21	18
Pediocactus	simpsonii ssp. campestris	21	18
Pediocactus	simpsonii ssp. idahoensis	21	18
Pediocactus	simpsonii ssp. indraianus	21	18
Pediocactus	simpsonii ssp. robustior	21	18
Pediocactus	simpsonii ssp. simpsonii	21	18
Phemeranthus	confertiflorus	20	18
Phemeranthus	sediforme	19	18
Phemeranthus	spirescens	19-20	18
Phemeranthus	validulus	21	17
Polianthes	virginica	?	?
Rhodiola	algida	19	18
Rhodiola	arctica	19	18
Rhodiola	semenowii	19	18
Sclerocactus	parviflorus	21	18
Sclerocactus	pubispinus	21	18
Sclerocactus	wetlandicus ssp. ilseae	21	18
Sclerocactus	whipplei	21	18
Sclerocactus	wrightiae	21	18
Sedum	acre	19	18
Sedum	album	19	18
Sedum	anacamperos	19	18
Sedum	bupleuroides	19	18
Sedum	cauticolum	19	18
Sedum	dasyphyllum	19	18
Sedum	dasyphyllum var. microphyllum	19	18
Sedum	divergens	19	18
Sedum	kamtschaticum f. variegata	19	18
Sedum	lanseolatum	19	18
Sedum	minimum	19	18
Sedum	oreganum var. procumbens	19	18
Sedum	pachyclados	19	18
Sedum	reflexum	19	18
Sedum	reflexum f. cristata	19	18
Sedum	reflexum variegata cristata	19	18
Sedum	spathulifolium	19	18
Sedum	spurium	19	18
Sedum	tartarinowii	19	18
Sedum	telephium	19	18
Sempervivum	' Alpha '	19	18
Sempervivum	' Beta '	19	18
Sempervivum	' Cleveland '	19	18
Sempervivum	' Director Jacobs '	19	18
Sempervivum	' Gamma '	19	18
Sempervivum	' Grey Ladies '	19	18
Sempervivum	' Majlands Hybrid '	19	18
Sempervivum	' Red & Green ' f. cristata	19	18
Sempervivum	' Red & Green '	19	18
Sempervivum	' Rose Agnes '	19	18
Sempervivum	' Thomayeri '	19	18
Sempervivum	' Westelin '	19	18
Sempervivum	'Limelight'	19	18
Sempervivum	'Rosie'	19	18
Sempervivum	allionii	19	18
Sempervivum	arachnoideum	19	18
Sempervivum	arachnoideum v. tomentosum	19	18
Sempervivum	ballsii	19	18
Sempervivum	calcareum	19	18
Sempervivum	dzhavachischvilii	19	18
Sempervivum	kosanii	19	18
Sempervivum	mamoreum var. dinaricum	19	18
Sempervivum	montanum var. stiriacum	19	18
Sempervivum	pseudoornatum	19	18
Sempervivum	reginae-amaliae	19	18
Sempervivum	rubrifolium	19	18
Sempervivum	schnittspahnii	19	18
Sempervivum	settilum rubrifolium	19	18
Sempervivum	vicentei	19	18
Sempervivum	violaceum	19	18
Sempervivum	x barbululatum cv. hookeri	19	18
Tephrocactus	articulatus	21	17
Tephrocactus	haematacantha	21	17
Tephrocactus	verschaffeldtii	21	17
Toumeya	papyracantha	21	18
Yucca	look at "Benny's Yucca page; Yucca hardiness"