Id like to grow 4 to 6 plants in a closet grow system but my girlfriend is concerned that the neighbors could potentially smell the plants. I live in a two bedroom apartment in a multi-story apartment building. I have neighbors on either side of my apartment, across the hall, and down below. Is there any chance that four to six plants would smell enough for the neighbors to smell it? The room has two windows but I'd be concerned that the neighbors below me might potentially smell it (they have a window directly below mine).