Garden design software

I need to plan a garden for my newly built house. Does anyone know of any good software that I can do the job on the computer?

 

I believe the good old BEEB do something similar if you want to have a play around with it and see if its any good....main thing is...its free

see here
http://www.bbc.co.uk/gardening/design/virtualgarden_index.shtml

 

Thank you! I'm off to try that now.

 

Foxtrot I tried the BBC virtual garden and found it cumbersome and basically not that good. If you look at the new Shoot garden site http://www.shootgardening.co.uk which is excellent - Although there isnt one on there at present I understand from Nicola (site owner) that a garden design add-on will be up and running fairly soon. Keep your eyes open for it because if its the same standard as the rest of the site you can rest assured that it will be very good.