Only a few types of trees have spherical, prickly seed pods, so here's how to identify each specific tree with spiky balls.

Trees and shrubs keep growing for years ... with the BBC One series The Green Planet to give away up to 1 million seed balls to schools across the UK! The seed balls - called Green Planets ...

To help teach the next generation about the importance of biodiversity, The Regenerators are teaming up with The Green Planet to give away up to 1 million seed balls to schools across the UK!