Clematis is a light loving plant, its growth is inseparable from light. In winter, you can put it in the sunny place. At this time, the sun is soft and won't burn the plant. The time of daily illumination should not be less than 6 hours, otherwise it will grow badly.
Most Clematis have strong cold resistance and can grow in the environment of - 20 ℃. However, the evergreen and F-Line are not cold resistant, and they are generally only cultivated in the south. If you want to keep it in the north, you need to put it in the greenhouse, or put a plastic bag to keep it warm.
Clematis will enter the dormancy period in winter, at this time, its water demand is not high. Watering must be less to ensure that the substrate is slightly moist. If the room is warm, you can also water it normally to keep it growing. Fertilization needs to be carried out in combination with basin change, adding organic fertilizer and bone meal as the base fertilizer, which is conducive to flowering in the next year.
Clematis need to be pruned in late winter and early spring to help new branches grow. But early flowers should not be pruned to avoid nutrient loss and affect flowering. Large flowers need to be cut lightly, keeping the plant type unchanged, only cutting off some of the long branches, leaving about 7-10 knots for each branch. Late flowers should be properly cut, cut most of the branches, and keep 3 - 7 sections.