The things holding up the plants are trellises that fit right into the Earthboxes. I got them at my local nursery here: http://www.summerwindsca.com/ca/locationsdetail.asp?storeid=71

I actually posted about the Earthboxes before here: http://forums.equipped.org/ubbthreads.php?ubb=showflat&Number=173411

... Before planting anything, and especially to help you with selecting the proper planting mix, please check out the earthbox forum and read some of the stickies they have there.

http://forum.earthbox.com/index.php?board=4.0