only if u have illegal plant numbers and get busted. or if ur landlord gets a grudge against u, and calls the cops on u. i believe he CAN kick u out if he doesnt like it, since its his property.
maybe try having him sign something that says hes ok with it, as long as it is 100% legal, and for personal use. then he cannot say he didnt know about it, and kick u out. he may not sign it though haha.
or maybe invite him in to see the setup, then secretly take a pic of him looking at the plants. if he ever pulls that "i didnt know" thing, break out the pics. its ur apartment, so its legal to take a pic of em inside