>>798828They're mostly cultivated as annual in temperate climates, but they're perennial in South America, and so are they if you get them back in when it's getting colder (I live in France, zone 8b)
I trim them a little, because there isn't enough light at home to enlighten all the leaves. Mines are two years old I think.
The great thing when you overwinter them is that they almost immediately flower once weather gets good. Also, they get quite woody which is aesthetically pleasing. Some even do bonsais with them (pic related).
