One thing that I love to do during a portrait shoot is to take fresh flowers from the garden and use them during the session if the client is up for it.
Red just happens to be my favourite colour, so I often gravitate in that direction and contrasted against a black background can create drama.
Simple petunias and a stunning profile equals dramatic portrait.
For more portraits with or without flowers, check out the portrait page on my website here . . . http://www.helenokey.com/portraits.html