Yucca

Spanish Bayonet, Yucca aloifolia 0°F 

Yucca angustissima RED SEPAL FORM, Narrow-leafed Yucca zone 5

Yucca angustissima ssp. Kaibabensis, Kaibab Yucca zone 5

Yucca baccata, Banana Yucca -20°F

Yucca baccata 'Pink Marshmallow' zone 4 (possibly a hybrid) 

Yucca baccata v. vespertine zone 4

Yucca elata, Soaptree Yucca -10°F 

Yucca elata (Elfin Form) zone 5

Yucca elata var. radiosa Zone 5/6

Yucca elata var. utahensis zone 5

Yucca faxoniana x rostrata zone 5

Yucca faxoniana, Spanish Dagger 0°F 

Yucca filamentosa 4-11

Yucca flaccida 'Color Guard' zone 4-10

Yucca glauca (Sky Blue Form) zone 3

Yucca glauca x baccata zone 5

Yucca glauca, Plains Soapweed zone 3-4

Yucca glauca, Soapweed Yucca -35°F 

Yucca gloriosa, Spanish Dagger 7

Yucca gloriosa var. tristis 7a

Yucca gloriosa 'Variegata', Variegated Spanish Dagger 7a

Yucca harrimaniae zone 4

Yucca nana, Dollhouse Yucca zone 4

Yucca neomexicana Mini New Mexico Yucca zone 4

Yucca pallida, Texas Blue Yucca 0°F 

Yucca recurvifolia, Soft Leaf Yucca 0°F 

Yucca reverchonii 'Seep Yucca' zone 5

Yucca rigida 5°F 

Yucca rostrata, Beaked Yucca 5°F 

Yucca rupicola, Twistleaf Yucca 0°F 

Yucca 'Silver Anniversary' 5b-10b  cross between Yucca filamentosa and Yucca pallida.

Yucca thompsoniana, Thompson’s Yucca 5°F (or zone 5)

Yucca toftiae zone 5

Yucca torreyi 'Chaves' 5b is a hardier strain of Yucca torreyi

Yucca torreyi, (Torrey's Tree Yucca) -10 or -15 degrees

Yucca treculeana CROCKET CO, TX FORM zone 6

Yucca treculeana, Spanish Dagger 10°F