Greenclaws was a children's television series aired on the BBC in 1989.
Greenclaws was a big green monster who lived in a greenhouse. The man who played Greenclaws was Nick Mercer. Every week, Iris would visit Greenclaws. They would put one of Greenclaws' fabulous seeds 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. There would also be a story told featuring relatives of Greenclaws while the plant was growing, accompanied by illustrations.
Owlma is meant to be a female owl. The "Twit Twoo" call is actually two owls calling to each other. The female calls out the "twit" sound to which a male owl answers with a call of "twoo".
Greenclaws has been shown several times on BBC1 and BBC2 from 1989 - 1994 with a brief showing at Christmas 2000/New Year 2001. CBBC on Choice premiered Greenclaws on Day 1 on Monday 29th November 1999 at 8.30am, 11.30am and 2.30pm and continued until Friday 7th January 2000. It reappeared on Wednesday 15th March 2000 at the same times as before taking a break until Monday 12th February 2001 when it returned at 8.45am, 11.45am, 2.45pm and 5.45pm until Friday 16th March 2001. It has appeared on Choosy Bits in 2001/02 a few times. It resumed showing in the main schedule on Monday 3rd September 2001 at 7.20am, 10.20am, 1.20pm and 4.20pm until Friday 5th October 2001. The re-runs continued after CBBC on Choice ended on CBeebies twice beginning Monday 13th May 2002 - Friday 14th June 2002 and Monday 31st July 2002 - Friday 31st August 2002.