Question: outdoor fat plants
which are the succulent plants that I can put in a rock garden and which last outside even in winter without having to withdraw them.
Answer: outdoor fat plants
there are so many succulents that can survive outdoors, even with very cold temperatures, many degrees below zero; unfortunately in the countries of origin of many succulents, winter is a completely dry season, so the survival of these plants is guaranteed only by a completely dry soil, from October until March; in fact in many succulent gardens the flowerbeds are equipped with canopies, which do not keep the frost away, but prevent the rain water from reaching the ground around the plants.
So if you want to avoid covering your rock garden in winter, you will have to choose those species that are not afraid of frost mixed with water.
Much depends on where you live and how your rock garden is positioned, because if you live in Catania and you have a small garden facing south, you can also put a long series of cacti, echinocactus, echinocereus, coryphanta, strophytum outdoors. , opuntie (always avoiding that they receive in addition to the cold also of water); if you live in Como and your rock garden receives only a few hours of sunshine a day, chances are that even the most resistant to the cold can die.
The succulents that are generally placed in rock gardens are agave and aloe, the former being outdoors even with short periods of frost, the latter often being ruined in the case of very intense frosts; a long series of succulent plants does not fear the cold, which sometimes damages them, but letting it then germinate again when spring arrives, such as the sedum, which develop in the summer and dry up when the cold arrives, and then re-sprout every year; many opuntias are also found in northern Italy, as long as they are a bright and sunny place and a good, very draining soil; many creeping aizoaceas are also kept outdoors, such as delosperma, aptenia, or various types of mesembriantemi. Pi depends a lot from species to species and from how plants are cultivated; to give you an example the typical pillow of the mother-in-law (echinocactus grusonii) can withstand short frosts, but only if it is kept outdoors all year round, and therefore it can "get used" to the cold gradually, it must be placed in a sunny area, without large rains, or with very well drained soil, and away from the wind.