Members of the above palms and other genera are sometimes grown in areas where they are not truly hardy, overwintering with the aid of various kinds of artificial protection.
that are commonly referred to as "palms", but are not palms, i.e. not members of the Arecaceae family, include: Aloidendron barberae, Beaucarnea recurvata, Berberis eurybracteata, Cordyline australis, Cordyline indivisa, Cycas revoluta, Dasylirion, Cyathea australis, Cyathea capensis, Cyathea cooperi, Cyathea dealbata, Cyathea medullaris, Dicksonia antarctica, Dicksonia squarrosa, Dioon angustifolium, Dioon edule, Encephalartos, Macrozamia communis, Macrozamia johnsonii, Macrozamia riedlei, Mahonia oiwakensis, Musa basjoo, Musa sikkimensis, Pseudopanax ferox, Rhus typhina, Xanthorrhoea, Yucca aloifolia, Yucca gigantea, Yucca rostrata and Zamia integrifolia.
Some hardy palms can be cultivated in areas with low temperatures slightly below this range when given wind sheltering (planted on the south side of a building).
In the US, hardy palm cultivation is generally attempted from USDA zones 6b/7a southward.
As such, there are occasional reports of hardy palms be cultivated in areas with severe winters with low temperatures below −18 °C (0 °F).