This is a very good and comprehensive companion planting guide from Permaculture Australia. To see/print the thing in a readable format, the PDF address is below. http://www.permaculture.org.au/resources_files/Poster_GDN_Com_Plant.pdf —
Visual Companion Planting Chart (Guide) - Companion Planting -- just not for helping your plants make friends, but to help your plants grow to the best of their ability by having great neighbors to help them along! Give your garden plants new best friends!