Dig the City has collaborated with Sarah Raven and the seeds will be a mixture of cornflowers, poppies, lace flowers and cosmos. With an average of 500 seeds in every packet, this means at least half a million seeds will be given to gardeners across Manchester.
The free seeds will be given away from Selfridges, Jigsaw, LK Bennett, Molton Brown and Barclays in the city centre over the May bank holiday. Gardeners can check for growing tips and send progress reports to @digthecitymcr #diggarden.
Gardeners can also bring their blooms back to the Dig the City Information Point in St Ann’s Square over the first weekend of the festival.
Nelson Beaumont Laurencia, Dig the City producer said: "Dig the City is all about celebrating summer in the city, so what better way to get started than to grow your own garden party?"
"Gardeners should bring their blooms back on the first weekend of the festival and help us grow a garden right in the heart of the city. You’ll be in with a chance to win good things from the city centre’s top shops. If keen gardeners would like to bring any other flowers or plants to join our Dig Garden they would be most welcome!"
The festival will take place from Friday 31 July to Thursday 6 August.