Water. Thoroughly watering landscape plants before a freeze may reduce the change of freeze damage. Many times cold weather is accompanied by strong, dry winds. These winds may cause damage by drying plants out, and watering helps to prevent this. Wetting the foliage of plants before a freeze does not, however, provide any cold protection. A well-watered soil will also absorb more solar radiation than dry soil and will re-radiate the heat during the night.
Move inside. Move all tender plants in containers and hanging baskets into buildings where the temperature will stay above freezing. If this is not possible, group all container plants in a protected area (like the inside corner of a covered patio) and cover them with plastic. If plants are kept inside for extended periods, make sure they receive as much light as possible.
Mulch. For plants growing in the ground, mulches can help protect them. Use a loose, dry material such as pine straw or leaves. You should be aware that mulches will only protect what they cover. Mulch at the base of a bird-of-paradise will help the roots, but will provide no added protection to the leaves. Mulches, then, are best used to protect below-ground parts or crowns or may be used to completely cover low-growing plants to a depth of four inches. Leave complete cover on no more than three or four days.
Cover. If they are not too large, individual plants can be protected by covering them with various sized cardboard or Styrofoam boxes