If you have fallen in love with the geraniums in your garden and want to overwinter them for use the following growing season, here are several methods.
Method 1: Cut the plant between 1/2 to 2/3 back, being sure to remove all blooms and buds. Shake all the dirt from the roots and hang it upside down in a root cellar, garage, or crawlspace where the temperature will not drop below 52 degrees F. In the spring you can repot the plant.
Method 2: Pot up the geranium and cut the plant between 1/2 to 2/3 back, being sure to remove all blooms and buds. Store the plant in a dark, cool place such as a crawlspace where the temperature will not drop below 52 degrees F. Do not water. Bring the plant out in the spring and begin watering.
Method 3: Pot up the geranium and bring the pot indoors to a room with bright light that will not get below 55 degrees F. Water sparingly and pick off any diseased leaves.
Method 4: Take stem cuttings in August and overwinter small, vigorous plants in a room with bright light that will not get below 55 degrees F. Water sparingly.
