A party or barbecue is also a perfect time to give flowers to a man. Firstly, because they add a splash of living color to the get-together. And secondly—and this applies especially to "macho men"—he can always say, as looks lovingly upon the flowers you gave him, "Oh, those flowers aren't really for me. They’re for the party!"
In the final analysis, flowers for men are the same kind of gift they are for women: a gift of love. So, if your man knows you love him—or if you want him to know!—send him flowers. Just as women love receiving flowers for no reason at all, a surprise gift of flowers for him will work wonders, too.
View all Gifts for Men
Other sources:
http://www.aboutflowers.com/men.html
http://www.flowers.org.uk/Flowers/trivia/men-flowers.htm