Here is your problem. If your neighbor sees it A) will he/she want to steal it? B) friend/visitor of neighbor's want to steal it? C) will they call the cops who will then see it from their property - and then have enough probable cause to make your life hell...and risk loosing your license? I grow outdoors every summer but I also have a 10 foot fence. My neighbor could see my plants from the far corner of their roof top but I don't think that's in "plain view of". I would say if your neighbor can see your plants from common areas of their property, or out their window, I wouldn't risk it.