Kinda funny but I think this is a hoax.

The plant is too well-formed to have grown this way. It's too pristine. Sure a seed might sprout in his navel if it got enough moisture but would it ever develop this far without falling out? It's not like he stayed perfectly still for six days. He was out canoeing and camping. And what about those green leaves? Plants need light to synthesize chlorophyll. I doubt that there would be enough light passing through his sweater.

Disgusting! :/