The terms "tender succulents" or "soft succulents" cover a broad range of succulents that are less tolerant of cold temperatures than hardy succulents. We typically consider plants rated USDA Plant Hardiness Zone 9, 20 to 30 °F (-6.7 to −1.1 °C) and above to be tender succulents, but some plants in the category go as low as Zone 7, 0 to 10 °F (-17.8 to −12.2 °C). All tender succulents can be grown outside in frost-free areas (USDA Plant Hardiness Zone 10+). In colder zones, they can be grown in containers and moved inside for the winter.
Hardiness varies considerably among the different types. Most tender succulents with rosettes of thick fleshy leaves, such as many Echeverias, are partially hardy to at least 25 °F (-3.9 °C). Tender succulents with thinner individual leaves, like most Kalanchoes, can briefly tolerate temperatures just below freezing point but are killed back to the roots when the temperature reaches 25 °F (-3.9 °C.
This modest hardiness means they do well outdoors in regions that receive only light frost (such as many coastal locations) and in protected spots in colder regions.
Common tender succulents include Echeveria, Crassula, Kalanchoe, Aloe, tender Sedums, and Senecio.
Source: mountaincrestgardens.com
Links
- Succupedia: Browse succulents by Scientific Name, Common Name, Genus, Family, USDA Hardiness Zone, Origin, or cacti by Genus