2, cactus does not require high temperature, generally indoor temperature is enough, but don't give too much water. Water every half month to 1 month in summer. It can be watered once a week in the hottest time and once every two months in winter.
3. It can be placed outdoors in summer and indoors in winter, as far away from windows as possible to avoid air leakage between windows. Besides, it's best to let it see the light. If you can't see the light indoors, get at least one day of sunshine every week, and there is no need to gain weight deliberately.