Donations from the sale of each rose will go towards the Duke of Edinburgh's Award Living Legacy Fund.
Camilla visited one of the battalions of The Rifles, which she took over as Colonel-in-Chief from Prince Philip last year.
The Queen's grandson-in-law said they were not able to mingle afterwards to have any support from other family members.
Prince Andrew's positive ratings in a poll increased after his father's funeral.
Mike and Zara Tindall were able to attend the funeral of her grandfather Philip at the weekend.
Harry has returned to the US after a few days in Britain for his grandfather's funeral.
Prince Charles, Prince William and Princess Anne have all carried out some kind of engagement since Philip's death.
The rival broadcasters shared similar sentiments about a photo of the Queen mourning by herself.
The brothers walked behind their mother's coffin in 1997, at their grandfather's behest.