In the wild their location covers a large area from Europe to eastern Asia and also northern Africa. They are used in gardens in Europe, also colder States in the US. When speaking of coldness and hotness, they can cope temperatures down to -18° to 38° centigrade (c. -0.5° to 100° fahrenheit). As for the flowers, they are monocarpic, which means flowering once and then they die.
Graeme gave me Sempervivum arachnoideum for a birthday present and it is still clustering. As seen the plant has lots of white hair growing between the leaves and the petals are attractive. Its original habitat was around the Alps.
Adromischus ~ Astrophytum ~ Cephalocereus ~ Cereus ~ Cyanotis ~ Echinopsis ~ Epiphyllum ~ Espostoa ~ Ferocactus ~ Frithia ~ Gymnocalycium ~ Haworthia ~ Hildewintera ~ Lithops ~ Lophocereus ~ Mammillaria ~ Notocactus ~ Opuntia ~ Pilosocereus ~ Rebutia ~ Schlumbergera ~ Sedum ~ Stenocereus ~ Sulcorebutia ~ Tephrocactus ~ Turbinicarpus ~ Weberbauerocereus