Temperature: In temperatures below 35°F or above 95°F for more than any hour can kill many plants.   Be careful when deciding how to transport them so they have the least exposure to these kinds of extremes.

Water: Most house plants can survive for a seven to ten days without water with little harm. It's best to plan your watering schedule so that your plants are at their driest (without being too dry) before your move.  You will want the soil to be slightly moist to protect the roots. By keeping your plants only slightly moist, you also limit the weight of the plant, making larger plants easier to transport.  Be sure to water them as soon as possible. (Don't forget to treat for shock.)

Darkness/light: House plants can tolerate darkness for up to a week (but it's not suggested), if conditions are favorable. Be careful when first exposing plants to light after prolonged darkness.   Gradually introduce them to the light to avoid wilting.

Cuttings: For convenience, space saving and that chance to take some of your prized outdoor plants with you, you can take cuttings of your favorite plants (if possible). Most cuttings can survive for several days if kept in a plastic bag containing damp vermiculite, peat moss, or perlite. Be sure to transplant them out of the plastic bags as soon as possible to allow them a better chance of survival.

State Lines: Some states' agricultural divisions have lists of plants that can not be brought across state lines for pest control issues.  Please contact the state agricultural department to receive their list of contraband plants.