The point some people seem to be missing is that it's easier to mask the scent with something that smells like your plants rather than trying to mask it with nice smelling odors. I don't know about you, but if I spray rose scented air freshener after taking a dump, it smells like I shit on a rose bush. I've never ever thought "Gee doesn't that smell good now."
Don't get me wrong, I love the idea of planting tons of good smelling herbs and flowers and I'm not criticizing that approach to the problem. But cannabis has such a potent skunky aroma, you're not going to hide it that way. For example, there's a winery nearby that grows acres of lavender and it smells amazing. But I guarantee that if were to take anybody's full grown, odiferous pot plant and put it in those acres of lavender, it would smell like lavender scented pot... or skunk.