I kept ivy geraniums over for years. I keep them dry in my cold garage in their pots. If they start to grow I put them under a shoplight. They store almost as well as zonals.
The only pelargoniums I can keep indoors are scenteds, I don't know why! :) Taking cuttings and keeping the cuttings in your brightest light might work indoors.
Debbie

I was searching to find more info on keeping Geraniums over the winter as well. Can either of you back up a bit and be more specific about how to accomplish this? (ie temps, watering, lighting, types of geraniums that have good luck over wintering?)
A huge thank you in advance!
Stacey

They can take alot of cold. I'm no expert but I've managed to carry them over keeping them in a unheated sun room. I stuck the pots in old coolers filled with stryo peanuts and if the temps went into the teens I'd cover them with a blanket. They looked awful in Spring, but recovered and were huge. It's work, but sometimes it's worth it.
Jane