Going beyond Sempervivums (hens'n'chicks,) Opuntia (prickly pear,) Sedums (stonecrops)... which already have a widely recognized reputation for hardiness and don't need to be discussed...
I've had these in mini gardens outside for a few yrs, protected from rain but not dew:
Sedeveria
Euphorbia tirucalli (root hardy only)
Graptosedum
Haworthia cooperi
Lithops
Graptopetalum paraguayense
Kleinia petrea (root hardy only)
Crassula tetragona
Crassula muscosa
Kalanchoe eriophylla
What other plants can survive outside permanently in Z8 (or lower?)
Hoping to put as many succulent plants as possible in GH because they are the ones that have the most difficulty getting enough sun inside during winter. A GH will keep them protected from rain and prolific dew, but won't be heated unless it's supposed to go below low 20's, temps that only last for a few hours during the coldest nights here.
Hoping those from more dry Z8 (or lower) climates would tell us what succulents they are able to have in outdoor gardens or left in pots outside all year.
