Geraniums (actually pelargoniums) are half hardy or tender perennials which means they will survive a mild winter such as those in San Diego where only a light frost lands in winter. In other climates you can move potted geraniums under the eaves of the house to keep them very dry so that they will go dormant and survive a few frosts. In very cold winters where snowfall sticks around you will need to move the plants to a cold but not freezing garage and keep dry until spring when the plants can be cut back, watered and brought into the sunshine as they sprout new leaves. Keep overwintered plants protected until all danger of frost is passed. Depending on where you live, another way to overwinter geraniums is to uproot the plants, tie string on the stem and suspend the uprooted plants from the rafters of a garage or shed. This keeps the roots dry and the tops cold so the plants go dormant. In spring cut off the dead tops but leave at leas six inches of stem and repot into fresh soil and bring into a sunny, but cool room as they put out new foliage.   Two more ideas for overwintering geraniums in a cold climate are to move them indoors as houseplants or take cuttings in the fall and baby the new cuttings all winter indoors for transplanting outside in the spring. Keep growing, Marianne Binetti