Each fall, I move the container geraniums (pelargoniums) into a dry sunny spot for a month, under the house eaves.  No water.  By drying them out, they go dormant.  Then I move them into the garage, which does not freeze but is cool.  In the Spring, I move them back outside, trim them a little, and start watering again.  I give them some growing plant food (more nitrogen), then when they are recovered, they get some blooming plant food.  These geraniums are about 4 or 5 years old, becoming large and bushy.  Nice plants.  Some of the containers also contain 4=Four O'clocks or Nerines.  I might remove the Four O'clocks this year if they are too rangy.  I have some of those in the flower border as well.

In the other containers, I stuck some nasturtium seeds -partly for flower and partly for salads; orchids, and carnivorous plants.  The cactus was a grocery store nopale that I planted in cactus soil a couple of years ago, and keep in the sunroom during the winter.