They prefer morning sun over late-day sun. The soil they are in should be kept moist. Each plant can live for several years. To keep the plant in the garden, root some cuttings every couple of years to use as replacements for expired, old plants. Prune scented geraniums as they become leggy.
Scented geraniums are native to South Africa and so a hard freeze can harm the plant.
It, like other tropical plants, can be cut back if frost-damaged, once temperatures warm. These plants have few pest problems. Insects do not seem very interested in scented geraniums. Here, root disease seems to be their main pest. Watering correctly can go a long way in preventing root problems.