Thanks Mike and Astonian
In the 1881 census the Farm is given as separate address. Living at the Farm House is William Young and his family, a gardener born in Small Heath. Its not possible to tell if he was 'market gardening' at the farm or working elsewhere. It may suggest that the farm house was the last remnant of a farm no longer in use.
The clues to the where are is that its in the reg. district of Kings Norton and the Parish of St Marys (Moseley), the next entry on the census is Alexandra House, Bell Walk (Occupied by a John Lowe, family and servants.) and the previous entry is Woodfield House, Woodfield Road occupied by Frank WCB Cane (or Cave), his family and servants, a Dental Surgeon. There is an interessting note in the column next to a household of his servants that says 'gadrener college'.
Have no more!