The brief will include forthcoming campaigns for peanut butter brand Sun-Pat, Hartley’s Jelly Pots and dairy-free milk brand Dream.
Several of those brands were bought by Hain Daniels from Premier Foods in 2012 in a deal worth a reported £200m.
Although Cambridge-based agency Kiss has worked on PR for Sun-Pat in recent years, this is the first time a PR agency has been hired for all the brands in the grocery division since the acquisition.
Aduro’s first campaign will be for Sun-Pat. Launching in October with the tagline "Spread the Energy: Fuel Your Dreams" and targeting secondary school children and mothers, it will feature Olympic ambassadors and involve photography and video.
A campaign for Hartley’s 10-Cal Jelly Pots in January will involve a celebrity ambassador and social influencer campaign, while a campaign with a "strong influencer element" is also promised for Dream.
That division includes New Covent Garden Soup and Linda McCartney brands.
Yorkshire-based Hain Daniels, which is part of US food-and-drink giant Hain Celestial, generates annual revenue of around £400m.