By the way, if you need to mail a tall plant and the USPS Priority tube is too skinny, you can combine two of them together to make a nice rectangular box. I just need to slit the ends somewhat to make your own flaps. It costs a bit more if you exceed 1 cubic foot, though. I modify these boxes a bit further for shipping chestnut roasters to keep it below a cubic foot. I'm a firm believer that the easiest dollar made is the one you save (don't spend)! I shipped over 600 boxes last year and only two of them (FedEx shipments to Hawaii) were boxes I paid for.
