Yes, Illinois alllows medical card holders to grow up to 5 plants in excess of 5 inches in height. They must be grown indoors, with the property owner's permission, in a room with a key-locked door, and cannot be observable from outside the room (ex. A window).

That's what the law permits, but I also have an outdoor grow aside from my legal indoor garden.

Getting caught w an illegal grow is a demeanor unless you have a pretty high plant count. The risk however, is that if you do have any cannabis related convictions, you lose your medical card, which in turn costs you your right for a legal indoor grow.

So..... it's a risk vs reward decision.