It starred Nick Mercer and Stella Goodier, was written by Ursula Jones, directed by Adrian Mills, and produced by Christine Hewitt.

They would put one of Greenclaws' fabulous seeds (that were once found and left by Greenclaws' Great Uncle Vasco d'Itchyclaws) in a plant pot, put the plant pot inside a secret growing place in the Riddle Tree, wait for Owlma (a mechanical owl) to alert them that the plant was ready, answer three riddles/questions correctly from Owlma (which were always along the lines of "Twit twoo, twoo, twit twit twoo?"

and then translated into English by Iris for her and Greenclaws to solve), then open the tree to find the plant had grown into something bearing unusual fruit.

Each episode featured a song filmed (lip-synched) on location, most of which were written by Hilary James and Simon Mayor.

Despite this, the series was repeated several times, including in a later-afternoon Children's BBC slot, where a slightly older demographic audience less likely to be intimidated by Greenclaws's appearance, would be watching.