Many Yuccas are frost hardy to some sense, and the text on this page
is how I rate the hardiness in the area where I live.
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".
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 a 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.
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.
hardiness | Notes, etc. | ||
Yucca | 'Karlsruhensis' | 18, 19-20 | |
Yucca | aloifolia | 14, 22 | |
Yucca | aloifolia forma marginata | 14, 22 | |
Yucca | aloifolia ' Tricolor ' | 14, 22 | |
Yucca | angustissima | 17, 21 | I haven't tried this one out side, and it might be even more hardy! |
Yucca | angustissima ssp. avia | 17, 21 | I haven't tried this one out side, and it might be even more hardy! |
Yucca | angustissima ssp. kanabensis | 18, 19-20 | |
Yucca | angustissima ssp. toftiae | 17, 21 | I haven't tried this one out side, and it might be even more hardy! |
Yucca | arkansana | 18, 19-20 | I have only tried forms from Oklahoma, and more northern forms may be more hardy! |
Yucca | arkansana ssp. freemanii | 17, 20-21 | I haven't tried this one yet, so this is an estimated rate |
Yucca | arkansana ssp. louisianensis | 17, 20-21 | |
Yucca | arizonica | 15, 22 | I haven't tried this one yet, so this is an estimated rate |
Yucca | baccata | 18, 20, 20-21 | |
Yucca | baccata ssp. thornberi | 17, 21 | I haven't tried this one out side, and it might be even more hardy! |
Yucca | baccata ssp. vespertina | 17, 21 | |
Yucca | baileyi | 18, 19 | I have only tried the northern forms, and forms from a location further south may not be as hardy! |
Yucca | baileyi ssp. intermedia | 18, 20, 20-21 | |
Yucca | brevifolia | 15, 22 | My plant is still young, so this is an estimated rate, and it might be even more hardy! |
Yucca | brevifolia ssp. herbertii | ? | |
Yucca | brevifolia ssp. jaegeriana | 17, 21 | My plant is still young, but so far it has been OK down to -15C to -18C |
Yucca | campestris | 17, 21 | My plant is still young, so this is an estimated rate, and it might be even more hardy! |
Yucca | carnerosana | ? | |
Yucca | constricta | 18, 20 | |
Yucca | elata | 17, 21 | I haven't tried this one outside, and it might be even more hardy! |
Yucca | elata ssp. utahensis | 17, 21 | |
Yucca | elata ssp. verdiensis | 17, 21 | My plant is still young, but so far it has been OK down to -15C to -18C, I haven't tried this one outside, and it might be even more hardy! |
Yucca | faxoniana | 16, 21-22 | My plant is still young, so this is an estimated rate, but it might be even more hardy! |
Yucca | elephantipes | 14, 22 | |
Yucca | faxoniana x glauca | 17, 21-22 | My plant is still young, but so far it has been OK down to -15C to -18C, I haven't tried this one outside, and it might be even more hardy! |
Yucca | filamentosa | 18, 19 | |
Yucca | filamentosa
ssp. concava
forma albovariegata |
17, 20 | My plant is still young, but so far it has been OK down to -15C to -18C, I haven't tried this one outside, and it might be even more hardy! White stripes on the leafs |
Yucca | filifera | ? | probably not frost hardy since it's a Mexican species |
Yucca | flaccida | 18, 19 | This one is the most hardy species, and the most common in cultivation. |
Yucca | flaccida 'Bright Edge' | 17, 20 | My plant is still young, but so far it has been OK down to -15C to -18C, I haven't tried this one outside, and it might be even more hardy! yellow stripes on the leafs |
Yucca | flaccida ssp. smalliana | 17, 19-20 | My plant is still young, so this is an estimated rate, but it might be even more hardy! |
Yucca | flaccida 'Golden Sword' | 17, 20 | My plant is still young, but so far it has been OK down to -15C to -18C, I haven't tried this one outside, and it might be even more hardy! yellow stripe in the center of the leafs |
Yucca | glauca ssp. albertana | 18, 19 | My plants is still young, so this is an estimated rate, but it might be even more hardy! |
Yucca | glauca ssp. glauca | 18, 19 | The hardiest Yucca! |
Yucca | glauca ssp. stricta | 18, 19 | |
Yucca | gloriosa | 17, 20-21 | I haven't tried this one inside the greenhouse, but it might prove to be very good in there! Outside it does not survive a Danish ice-winter! |
Yucca | harrimaniae | 18, 20-21 | |
Yucca | harrimaniae ssp. neomexicana | 18, 20-21 | My plant is still young, so this is an estimated rate, but it might be even more hardy! |
Yucca | harrimaniae ssp. sterilis | ? | Never tried! If you grow this one and you can spare a cutting, please send one to me!? |
Yucca | nana | 18, 20-21 | My plant is still young, so this is an estimated rate, but it might be even more hardy! |
Yucca | pallida | 18, 21 | Can survive in a protected bed, but only barely! |
Yucca | recurvifolia | 18, 21 | My plant is still young, so this is an estimated rate, but it might be even more hardy! |
Yucca | recurvifolia x glauca? | 18, 19 | |
Yucca | reverchoni x thompsoniana | ? | |
Yucca | reverchoni | 18, 20-21 | |
Yucca | rigida | 16, 22 | My plant is still young, so this is an estimated rate, but it might may probably be hardy in an unheated greenhouse, if planted in a well drained bed. It handle -7C in Birmingham, England. |
Yucca | rostrata | 17, 21 | My plant is still young, so this is an estimated rate, but it might be even more hardy! |
Yucca | rupicola | 18, 21 | I have tried this one in a protected bed, and it where killed in a hard winter (1995-95) |
Yucca | schidigera | ? | I don't know how hardy this plant will be in Denmark, but it may probably be hardy in an unheated greenhouse, if planted in a well drained bed. |
Yucca | schottii | 16, 22 | My plant is still young, so this is an estimated rate, and it might be even more hardy! |
Yucca | thompsoniana | ? | |
Yucca | torreyi | ? | |
Yucca | torreyi forma parviflora | ? | |
Yucca | treculeana | ? | |
Yucca | whipplei | 15, 22 | |
Yucca | whipplei ssp. caespitosa | 15, 22 | |
Yucca | whipplei ssp. intermedia | 15, 22 | |
Yucca | whipplei ssp. newberryi | 15, 22 | |
Yucca | whipplei ssp. percursa | 15, 22 | |
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