The frequency of your winter fertilization largely depends upon the type of potting medium you are using and how freely you are able to water.

For example, if you employ a mineral based gritty type of mix, and drench the plants thoroughly every time you water, then you should continue to fertilize frequently.....but at a much lower rate.

Fertilization also depends on the temperature and light (quality and duration) conditions that your plants will be facing when you bring them in.

Thank yum. Great info.