Overwintering Geraniums Horticulture Overwintering Geraniums Geraniums are popular bedding plants, blooming freely from May to frost. However, the first hard frost doesn't have to be the end for your geraniums. They can be overwintered by potting up individual plants, by taking cuttings, or by hanging the plants upside down in a cool, dry place. After potting, water thoroughly and place the plants in a bright, sunny window.
Geraniums prefer cool indoor temperatures.
During their stay indoors, water the plants thoroughly when the soil is dry to the touch. Occasionally pinch or prune the geraniums to maintain stocky, well-branched plants. Pinch off the lower leaves, then dip the base of the cuttings in a rooting hormone. Stick the cuttings in a rooting medium of vermiculite, coarse sand, or a mixture of coarse sand and sphagnum moss. Clay or plastic pots with drainage holes in the bottom are suitable containers.