Keep it casual for the daytime by accessorizing with neutral accessories.
if you can make it through the night, there's a brighter day by Bethiesue08 featuring 3.1 Phillip Lim cardigans
Marc by Marc Jacobs Primrose Garden cotton sundress by injuly featuring Marc by Marc Jacobs day dresses
Wear this dress alone on warmer days and let the sun hit your shoulders.
For cooler days, a scarf, tights and closed-toe shoes will still compliment this dress.
You can also toughen up your look by pairing it with a black leather motorcycle jacket.
Always remember that fashion is about experimentation. The floral pattern shouldn't limit you, from mixing in different patterns.
On a budget? Check out some great sundresses for under $25 at Forever21.com like this Heritage 1981 Geralyn Floral Sundress.