The incidence of vertigo has been reported to be as high as 1.5% in the general population and some reports suggest that more than 5% of adults experience some kind of vertigo each year. In 80% of affected individuals, this symptom resulted in a medical consultation, interruption of daily activities, or sick leave.
Temperature Thresholds. According to Protabase, geraniums grow well in the temperature range of 65 to 95 degrees F during the growing season, and in the winter low temperatures between 40 to 50 degrees F, according to the A-Z Encyclopedia of Garden Plants..
Martha Washington geraniums require six hours of sun each day. If they receive less, than that, the plants tend to get leggy and may not bloom profusely. Although the plants prefer full sun, it's best to keep them out of intense midday sun in the summer to prevent the leaves from burning.