[nwtv2003]

That's my recollection. I'm sure it featured on Breakfast on occasions as well.

Last I checked it was very much accessible from the tram stop. Although if it wasn’t for the small plaque in place you wouldn’t know you were walking in the Blue Peter garden. I haven’t been to MediaCity for about 18 months, but very little has changed there since its inception.  (If anything the ITV/Coronation Street complex has had the most changes in the last few years.) 

There is a possibility Blue Peter may have something at RHS Bridgewater, which is just up the road from MediaCity at the other end of Salford.