If you're looking for the perfect 50s flower dress you must take a look at Sohomade . This Etsy store located in New York City is run by Louise Hedley, creator of marvellous garments.
The Tea Dress is my favorite and it's actually the most popular style at the moment!
These dresses come in a great variety of printed fabrics and are often one of a kind, but for a limited time only you can order a custom made piece.
The price is 85 US$ and the chinch belt is included :-)