I'd like to know the total advertising revenue, in UK pounds, that was
spent in 2003 or 2004 within the market sector 'Gardening' -
encompassing all aspects relevant to that market area.  To include all
advertising mediums i.e. press, consumer magazine, radio, television,
poster etc.  If possible I'd like to know the individual figure for
online spend.  Please supply also the source of any information.

I suggest you try Mintel reports who provide market intelligence
including predicting consumer trends. Their web address is
www.mintel.com. There may be cost in downloading the reports.
Otherplaces you might try are the National Gardening Association
(http://garden.org.) who also undertake market research.

For help in finding your answers, you might want to think about
employing a business coach. Try www.ukclc.net or www.upcoaching.co.uk