I have been shipping small plants in general for over 20 years and there are a few tricks you pickup. Certainly, water the plants well, maybe a day before you ship. You want them to have water, but you don't want it seaping out of the containers and ruin the cardboard box you would ship them in. Lets say your shipping them in 4 inch pots. Take some packing tape and tape around the stem, but cover the entire top of the pot so no dirt will move or fall out. Even if the pot isn't totally full, fill it up with a little more so it is even with the top of the pot. It never hurts to cover the plant material, and professionals use "sleeves" but you can wrap some paper around the plant and tape that to the pot. Then, you tape the pot to the box towards thew middle, that way, no matter how much peanuts, or anything else you might use to stuff the box, it really doesn't matter, becasue if the pots are taped down real good, those things aren't going anywhere. If you send priority mail, the plants will normally be fine. Of course, you would stay away from sending the plants to Arizona in July, but apart from that kind of thing, most hydrated plants should be fine over that 2 to 3 days period.
