The supermarket chain is following up its award-winning 2008 Valentine's campaign with a print and online promotion, including press ads and "a glossy cover wrap" on the Metro newspaper on 13 February.
Waitrose's heart-themed campaign, created by Miles Calcraft of Briginshaw Duffy, uses the slogan 'Everything you need for a romantic Valentine's weekend'.
Meanwhile, the charity Dogs Trust has hired Oglivy Group's advertising agency Mather to produce a direct mailing campaign that takes the form of a red envelope marked 'special delovery'.
It contains a Valentine's card with a picture of a dog asking recipients to 'Be my Valentine'.
Phil White, Mather's business director, said: "The objective of the mailing is to elicit a response from our predominantly female audience.
"By using a Valentine's Day-themed mailing, the reader can emotionally connect with the plight of dogs whose love has been lost."
Waitrose makes print the heart of its Valentine's campaign
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Retailer Waitrose and welfare charity Dogs Trust have both chosen print to be at the heart of their newly unveiled marketing campaigns for Valentine's Day.