Dobbies and its local competitor James Cocker and Sons are working together to create the 5,000sqm centre, which is due to open in October 2009.
The proposal is to trade under the Dobbies name on a 4ha site at Lang Stracht. The garden centre would employ about 120 people.
A planning application will be made in the next few days to Aberdeen City Council, with the target being an October 2009 opening.
Cocker’s will provide staff and build a rose garden at the new centre.
Cockers will continue their rose business, concentrating on mail order and the rose breeding side of their operation and will close their garden centre.
The existing Dobbies in Aberdeen will also close when the new Dobbies/Cockers centre opens.
Architect Pleydell Smithyman is also working on a garden centre for Forbes Homes near Aberdeen to open in spring 2009.