I had found a spoiler that gave a list of all the [magic] plants and now I cant seem to find it. If someone knows it...
All the magic plants are marked on the Virtual Seed Tray Chart, as well as instructions for breeding every plant you can breed with your seeds. You can download Virtual Seed Tray
HERE.
(note: That link takes you to a thread that has information in it that you might want to find out for yourself, aka "spoilers". To download the program without reading the spoilers, read the non-spoiler information at the top, and keep reading until you reach a point that warns you of spoilers. then scroll down quickly to the bottom of the note while averting your eyes. At the bottom of that page is where you will find the link to download the program.)