It's a good way to make affordable weed!

It's a good way to get unwanted attention...
-Utility companies including phone, cable, power, or gas may come onto your property unannounced and discover your plants.

It's a good way to get robbed...

Even if everyone that comes over is "cool", you don't know your utility workers!

Just be careful and think security first. If your space really lends itself well to hiding the plant visually as well as the smell, then you could.

I had one friend who did it in Cupertino, Ca, and he got his crop robbed.

I have some other friends who grow a couple of outdoor plants in a city not too far away and they are smart about it and have no problems.