Cacti and care for them The minimum temperature fordifferent species varies somewhat, mainly cacti contain in winter at a temperature of 5-15 ° C. For the transfer of cacti to the rest period, from the autumn they begin to gradually reduce watering. The temperature also gradually decreases. If the watering is reduced and the temperature remains high, the plant will continue to evaporate the moisture, but not to receive liquid in return, so the watering reduction and the temperature decrease should occur simultaneously. Reducing the illumination in winter will be natural for a plant if the watering and temperature are simultaneously reduced.To provide cacti with a cool winterit is enough to arrange a barrier from a sheet of glass on the edge of the window sill, so that the heat from the radiators does not touch them. A thermometer is simply necessary to ensure favorable wintering. It is necessary to monitor the temperature during the winter. Even if you insulate and seal the frames for the winter, if it gets cold outside to -30 ° C and below, the temperature on the window sill can also drop too low. If it is 6 ° C on the window sill, and the winter minimum for your cacti is 5 ° C, then it is better not to risk it, but to take action. With the onset of severe frosts, you can additionally insulate the frames by placing a woolen blanket along the window sill or placing pots with cacti on a sheet of polystyrene or thick foam rubber, but you cannot remove the protective glass from the window sill until the heating is turned off. To control the temperature, you need a thermometer, and to control watering, it is better to start a calendar, since in winter watering is rare, it is easy to forget what date you watered the plant. It is easier to hang a calendar somewhere in a visible place and mark the watering days on it. You can mark the watering days on the calendar for the whole year. Below you will find several simple ways