Matt Baker and Alex Jones are joined by Gardener's World's Monty Don. Justin Rowlatt finds out why sunflowers hold the answer to a puzzling maths problem. Show more
Discover 11,128,835 listings and 278,128 playable programmes from the BBC
Matt Baker and Alex Jones are joined by Gardener's World's Monty Don. Justin Rowlatt finds out why sunflowers hold the answer to a puzzling maths problem. Show more
BBC One
