So I snapped it up and planted it that afternoon in my garden. That night I had some friends come over with their kids. And I got very excited to take them all out to the garden to have a sniff. Littlest Monkey has a strong sense of smell and is rather particular about what he likes. So I was really hoping to surprise him. I led them out to the plant and commanded that they all get down on their knees, sniff and tell me what they smelt. There were a few moments of quiet apart from the sniffing. The adults looked a little quizzically at each other. But there was no holding back with the kids:
"It smells like poo"
At first I thought they were just being kids making the usual oh-so-funny poo jokes. But then the adults agreed that it did indeed smell like poo.
And then I remembered that I had lovingly prepared that flower bed beforehand with a pile of pelletised chook poo. And I can confirm that the unpleasant smell of chook poop is quite a bit stronger than the faint chocolatey aroma from a cosmos mocha.