Heyday magazine, which will form the main communication element of the scheme, will be published bi-monthly from July, with an initial print-run of 250,000. As awareness of the Heyday programme grows, the title's circulation will be boosted.
It will compete with Saga Magazine produced by Saga Group, which is the UK's sixth-biggest title, with a circulation of 1.2m.
Redwood chief executive Keith Grainger said Heyday, which uses the coverline "Having the time of your life", would reflect the programme's values of active participation.
"Its content will be geared toward 55- to 65-year-old members, combining information on issues that affect them with broader entertainment and an element of campaigning," he added.
Each issue of the magazine will contain at least 100 pages and carry third-party advertising.
Last week Age Concern appointed Clemmow Hornby Inge to handle the £8m launch of the Heyday programme.
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