Leinster rugby star Cian Healy is backing the Peter McVerry Trust's Valentine's Day campaign.
The trust is selling a range of roses to raise money for homeless and housing services in Dublin.
Supporters can choose to buy single roses, half bouquets, full bouquets and luxury bouquets.
The trust, which has been operating since 1983, provides drug treatment and housing services to homeless people among other supports.
Chief executive Pat Doyle hopes the new appeal will raise awareness of the difficulties couples face due to homelessness.
"The number of couples who have found themselves in need of homeless services has grown," he said.
"For couples who experience homelessness it can place a huge strain on relationships and homeless services can be a very difficult place to maintain a relationship.
"As part of our response to the growing numbers of people experiencing homelessness in Dublin, the Peter McVerry Trust increased its capacity to support homeless couples with the opening of a new service just before Christmas.
"As part of this new appeal we will be making sure couples we work with receive a bouquet of roses on Valentine's Day."