| pbaby, what exactly do you have in mind about "bringing them in"...and keeping them? Geraniums can indeed be brought in and treated like a houseplant...kept going in bloom for a while, then kept alive until the sun's value resumes in about mid February. Then there is the other way.....brought in and placed in a part of the house where the temperatures are a constant 40 to 50 degrees. This is the place where moisture is kept out of, where light is not allowed, where heat is denied and where the plant is left alone until we wish to re-invigorate them when the sun is better in mid February. My own plants, 5 of them...are now in their 8th year. So, you pick the way you wish to keep them going....for ever, and ever and ever. You might wish tho to not let your plant continue to bloom as it takes a lot of energy from the plant. Instead, pinch back the bloom and send that energy to the leaves and roots.
In any case, if you keep the plant going, cut it back about half...or more....repot in fresh new potting soil (mix with coarse sand and peat moss), keep the soil up away from the drainage holes, water ...always....til drainage, allow full drainge, then dump the excess. Allow the plant to dry down between waterings, and water ...always....til drainage. Dont feed a plant that is not growing. When growth is evident, begin feeding it at half rate 20/20/20...and each day, turn your plant 1/4 turn so that all parts of the plant receives equal amount of light. As the day's dwindle to a precious few...November....December..21st, you may wish to use artificial light for a time until the sun's value returns in February. The other method, you don't do a thing until February. | 
