Houseplant Check-Up
There is a rule of thumb with houseplants: if they are going to get stressed they often start to show it around mid-January. A couple of factors contribute to this.
First, houseplants typically head into winter with a lot of vitality after the long days of summer; by January short days have started to catch up with the plants. This effect is compounded as plants start to want to grow more, in the now obviously longer days, if there is inadequate soil nutrition for them to cycle-up. Second, by January heating systems have been running regularly for weeks on end, which dries out the air. Many plants respond negatively to the more arid conditions.