No matter what are the reasons why you have decided to grow marijuana outdoors, whether it is not enough space at home, the desire to have a bigger yield, or the special strain that requires fresh air and natural sunlight, you will face the problem of security. Unfortunately, it is a risky business even in the states where growing cannabis is legal (and we would not recommend you to do it illegally in any case).
If you want to sleep calmly and avoid checking your outdoor garden after the slightest noise you hear, it is better to install a well-constructed security system all around your precious garden. If you are a newbie, it is better to think about all the details before you start your project. It may save not only your head from exploding but also your plants from dying (and at some point, you may be in doubt about what is more important).