If you want petunias to bloom in winter, there are two main points, one is pruning, the other is temperature.
Generally, the flowering time of Petunia is also adjusted along with the sowing time. If you want Petunia to bloom in winter, you can sow it in early autumn, because it takes about 2 or 3 months from sowing to flowering. If you can guarantee the temperature, it is possible for Petunia to bloom in winter. Sow petunia in early autumn, then ensure proper light and temperature, as well as application of water and fertilizer.
Another way is to prune. In winter, petunias can't stand the cold outside. They need to enter the room, which is usually around October. Before entering the house, the petunia should be pruned. Generally, heavy pruning is the best way. The whole plant should be pruned by a large margin, and 2-3 bud holes should be reserved on each branch. When the preserved bud eye germinates, it can turn over the basin, remove about one third of the old soil, trim the lower root, and then it can be put into the basin again. Pay attention to the heavy cutting, but not too heavy.
Since you want petunias to bloom in winter, the maintenance work in winter is also very important.
Petunia is not resistant to low temperature. In winter, keep the temperature above 4 ℃, or it may freeze the plants to death. In addition, we should ensure that Petunia can be exposed to sufficient light in winter, and it's better to place it on the windowsill, and pay attention to ventilation, and it's better to open the window frequently for ventilation.
Good winter care, Petunia will grow healthily, and bloom.
