Protect them from the elements
Plants, like all forms of life, are susceptible to the elements. Especially if they are going a long distance, keep them in a temperature-controlled space (such as the backseat of your car) and out of direct sunlight. If it’s winter, wrap the plants in newspaper before transporting them, otherwise, they could be damaged by the extreme cold.
Wrap and pack them properly
When wrapping your plants, never use plastic. Instead, use paper such as packing paper or newspaper. It’s also important to keep them snug. If they are shifting around during transport, they could be injured, so place them in a box, for example, with paper or towels around them to keep them from moving around if there’s a sudden jolt or a sharp turn.
Transport them in your own vehicle if possible
Houseplants are safer in your own vehicle and some movers won’t even agree to move them. However, if you don’t have the room in your own car and your movers allow it, load them on the moving truck last and be sure to put great care in securing them so won’t shift around or get damaged during transit.
Don’t let them sit in a vehicle overnight
Leaving houseplants in a vehicle overnight is never a good idea. Not having access to fresh air can kill them, as can uncomfortable temperatures. Unload your houseplants right away when you get to the new home.
Water them the day before the move
Instead of watering them the day of the move, water them the day before and then as soon as you get them to the new home. This will make them easier to transport so they aren’t full of water when you try to move them.
Check out-of-state laws
In many cases, there are laws against moving houseplants across state lines and definitely out of the country. Always check the laws before attempting to move them out of state.