In addition to fruit trees, I was told that finding lilacs growing in an unusual spot might mean there used to be an outhouse or waste pile nearby: they planted lilacs to mask the smell. No idea if it's true or useful.
Even using different varieties to spread the season to six weeks you would still have 11 months to enjoy the smell of manure. if is the unique candidate, is a poor choice.
So, nope. Definitely not useful. We have much better options