Although floral dresses are definitely more prominent in the spring and summer months, you can still wear a floral pattern in winter - if the color scheme is right. I love this green and blue floral belted dress from Karen Millen for just that reason. It also has the perfect fit and flare silhouette, complete with a sexy v-neck and belted waist.
Dress: Karen Millen Belted Floral Jacquard Dress
Karen Millen is a British brand, and it runs very small. You may have to go up 1-2 sizes depending on the dress. Definitely try on a Karen Millen dress beforehand, or to be safe, order up. I recommend one size up for a fit and flare dress and two sizes larger than normal for a more fitted dress. You can always get the dress altered if it's too big (or just return it).
I am new to this brand, and first heard about it on one of my favorite websites, WornonTV.net, which covers fashion from your favorite TV shows. Karen Millen dresses, tops, and other apparel often turn up on shows like Bones, Pretty Little Liars and many others. I definitely recommend checking out the site. It may serve as great inspiration for your own "ootd" (outfit of the day, in hashtag speak).
Shoes: Stuart Weitzman Peep Toe Nude Pumps