Alright I did it. found all Four plants, But of course I was'nt keeeping track..
I just kept crossing and Mutating plants and seeds,.
I bought all the high end seeds $500x15 all different plants, use instant grow on those 15 plants then Mutate all those then cross polinate those and mutate twice more

Game Statistics

Real Hours this game 335
Seeds Planted 848
Plants sold 807
Money Earned $164,367
Average price per plant $203
New Breeds found 186
Magic plants found 4
Next time I'm gonna use handbase to keep track of the seeds and plants see what happens.