COLD HARDY PLANTS
 Growers and Breeders of Unusual Cold Hardy Plants

Plant Hardiness Testing

We photograph the plants we test and provide a brief description of what we observed during the test by clicking on the name of the plant.  A list of the plants we tested are detailed below.  This page is always being updated so please visit often.
Botanical Name
Agave goldmaniana
Agave havardiana
Agave lechuguilla
Agave lophantha
Agave mckelveyana
Agave neomexicana
Agave parryi
Agave parryi var. harvardiana
Agave scabiosa
Agave "unknown no. 1"
Agave "unknown no. 2"
Agave utahensis var. eborispina
Agave utahensis var. nevadensis
Agave victoriae reginae
Albizia julibrissin
Aloe striatula
Aloinopsis hilmarii
Aloinopsis schooneesii
Anthocephalus cadamba
Aridaria noctiflora
Aucuba japonica
Chasmatophyllum musculinum
Cunninghamia lanceolata
Cylindropuntia kleiniae
Cylindropuntia leptocaulis
Dasylirion wheeleri
Delosperma "alba"
Delosperma lydenburgense
Delosperma nubigenum
Delosperma sp. "mat forming"
Delosperma sp. "prostrate form"
Echinocereus sp.
Escobaria sneedii
Eucalyptus cinerea
Eucalyptus deanii
Eucalyptus debeuzevillei
Eucalyptus fastigata
Eucalyptus gregsoniana
Eucalyptus gunnii "blue ice"
Eucalyptus macarthurii
Eucalyptus microcorys
Eucalyptus neglecta
Eucalyptus punctata
Euryops tysonii
Hereroa teretifolia
Itea yunnanensis
Musa "basjoo"
Musa sikkimensis
Musa sp. "Yunnan"
Nananthus sp. "nice"
Nananthus vittatus
Opuntia engelmannii
Opuntia engelmannii x tortispina
Opuntia humifusa
Opuntia macrorhiza
Opuntia phaecantha var. arenacea
Opuntia phaecantha var. camanchica
Opuntia "Santa Rita"
Opuntia sp. 'erect'
Opuntia tortispina
Orostachys fimbriatus
Orostachys iwarenge
Orostachys malacophyllus
Pachyphytum bracteosum
Rhapidophyllum histrix
Ruschia rupicola
Sabal louisiana
Sansevieria aethiopica
Sequoiadendron giganteum
Stomatium niveum
Trachycarpus fortunei
Trachycarpus fortunei "Bulgaria"
Trichocerus tercheckii
Vanheerdea divergens
Washingtonia filifera
Xysmalobium undulatum
Yucca angustissima var. avia
Yucca angustissima var. toftiae
Yucca arkansana
Yucca arkansana var. freemanii
Yucca baccata
Yucca baccata var. thornberi
Yucca baileyi
Yucca baileyi var. intermedia
Yucca carnerosana
Yucca elata (south east of Sonoita, AZ  4,800ft)
Yucca faxoniana
Yucca filamentosa var. concava
Yucca filamentosa x elata "form 1"
Yucca filamentosa x elata "form 2"
Yucca filifera
Yucca flaccida
Yucca glauca var. albertiana
Yucca glauca var. stricta
Yucca glauca x arkansana
Yucca gloriosa "form 1"
Yucca gloriosa "form 2"
Yucca gloriosa "form 3"
Yucca gloriosa "form 4"
Yucca gloriosa "form 5"
Yucca gloriosa "form 6"
Yucca gloriosa "form 7"
Yucca gloriosa "form 8"
Yucca pallida
Yucca rostrata
Yucca schidigera
Yucca schottii
Yucca torreyi
Yucca valida
Yucca whipplei
Yucca testing 2000-2001 (general conditions, locations)

Coming Soon
Butia capitata (jelly palm)
Eucalyptus risdonii
Ginkgo biloba (maidenhair tree)
Hibiscus moscheutos "southern belle-red" (Hibiscus)
Hibiscus moscheutos "southern belle-pink" (Hibiscus)
Kniphofia sp.
Magnolia grandflora (Southern magnolia)
Nolina macrocarpa (bear grass)
Nolina texana
Phyllostachys aureosulcata (yellow groove bamboo)
Washingtonia robusta
Yucca aloifolia
Yucca brevifolia (joshua tree)
Yucca filamentosa (adam's needle)
Yucca glauca (plains yucca)
Yucca glauca v radiosa, Cliff, NM (elata)
Yucca glauca v radiosa, Pinalino Mts., NM (elata)
Zantedeschia albomaculata "Rhode Island" (spotted calla lily)

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