FedEx has suggestions here:
I'm not sure how big the plant is, but it's important that she wrap the root ball, and that she find a way to fasten it to the side of the box so that it doesn't shift around during transit. You should definitely use a priority service. And it's generally not recommended to ship plants when temperatures are over 90.
Make sure the root ball stays moist,.
We used to ship out live tomato plants so I am with Douglas on the importance of stabilizing the plant within the box. We used a combination of peanuts and styrofoam (recycled). Heat can kill a plant if left in a box for over 48 hours. Don't ship it wet, just moist. If you ship wet it can end up with nasty fungus infections by the end of the trip.
Thank you! And it's some babies or cuttings from that pretty chandelier plant we discussed a few days ago...