It took years in the same house before I found a window where the summer geraniums could survive through winter. There were many casualties along the way :(
Granted, they get leggy, and only the side facing the sun grows, so by spring they're rather assymetrical, but they live to see another summer, they get bigger and bigger, and best of all, they bloom continuously (albiet slowly)! I found this new flowerhead reaching for the winter sun this morning while on houseplant patrol. The pinks are wonderful. Thank you, Mother E!