There is a Hawaiian tradition that the placenta should be planted with a tree, which would then grow alongside the child - and parents have been angered when hospitals have obstructed them from taking the placenta.

BBC: NEWS | UK | Magazine | Why eat a placenta?

Vanilla is a vine that requires a tutor, another plant or tree on which to grow, and some work better than others.

FORBES: Haiti Doesn't Need Our Help

Caijing is a woodpecker, she says, forever hammering at a tree, trying not to knock it down but to make it grow straighter.

NEWYORKER: The Forbidden Zone

And me, I am especially worried about how to make sure the limes on my newly planted lime-tree grow, because I sure won't be buying them in a supermarket any time soon.

BBC: Australia: Where the good life comes at a price

The council bid for a grant from the Big Tree Plant Fund and worked with Trees for Life nursery to grow the trees.

BBC: Man picking apple

The Matsigenka hunt for monkeys and parrots, grow yucca and bananas, and build houses that they roof with the leaves of a particular kind of palm tree, known as a kapashi.

NEWYORKER: Spoiled Rotten