Most flowering plants do best in temperatures from 65 to 70 degrees. Keep plants slightly moist, but remember that it is best for soil to be on the dry side rather than the wet side. Avoid standing water in saucers underneath plants. Foliage Plant Protection Be sure to protect foliage plants during the winter months. Moving the plants to a protected area is one option.
Some people cover tender plants with blankets or plastic on cold nights.
This will protect plants to a slight degree, but is not sufficient on freezing nights. The recommended pH for most of these plants is 5.5-6.0. Bedding plants established in October and November should be putting on a good flower show by December. Do not overwater, but irrigate well a couple days prior to cold fronts passing through the state. This will hydrate the plant and minimize damage caused by drying winds.