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I'm a medical marijuana card holder in Colorado and when I first started growing under the states law I found the three vegging plants and three flowering (state law) was not enough to help with my problems let alone enough to get me from one grow to the next. So I went way over the limit by oh, let's say by over hundred or so plants. Now days however I stick to the limit since prison terms start at 4 years. I like freedom better than pot!
So in all states where they have medical marijuana laws they all pretty much are the same when getting busted.
1. If you hold a medical marijuana card or a like and get busted for growing, and you have the legal limit or less they will throw the case out.
2. State laws do protect you, your grow, and all of your equipment, if of course you were growing according to the state laws in your area. State laws in all medical marijuana states (from what I have learned), states that the feds and or the police must becareful with all your stuff, including your plants if you stated upfront, and right away that you are a medical marijuana user and that you hold (and show) a state certified card or a like. State laws also state that you have a legal right to get all your stuff back in undamaged condition. They can not kill your plants or bust up your equipment or your house or your grow room.
And on one last note:
Fly overs and the use of infared sensor done by flyovers or on the ground are a violation of your 4th admendment rights. Google search for Kelly vs State of Oregon for more information on this matter. You'll be amazed at what legal rights you do have.