Proper plant spacing will reduce botrytis on leaves that can sometimes build up during wet seasons. Occasionally, geranium plants or single leaves will wilt for no apparent reason. This should alert the homeowner to a serious problem known as bacterial blight. No sprays are available and removal of the plant from the site should be done immediately. Plants purchased from greenhouses have been started from clean stock plants or seeds thus eliminating many potential disease problems.
Gardeners often like to experiment and keep over their geraniums from year to year.
This is possible by taking cuttings in late August and rooting them as discussed earlier. Plants can also be dug, trimmed back to one half their original height, repotted and placed in a sunny window for the winter months. Some people also save geraniums by digging them, removing soil and hanging from the rafters in the basement on hooks. Because there is no sure way of knowing if this method will work in your home, try it and if successful you will have plants next spring. There are many types of geraniums.