You can refrigerate it until you are ready to serve however I would recommend that if you were making it for dessert, that you slice up the watermelon and have it on the cake plate. You can cover it until you are ready to serve dessert. At that time, you can add the piping of whipped crea, along with the berries and flag. It was a big challenging to photograph since I had the candles lit and it was melting the whipped cream.
Next, I added blue placemats and star candleholders. I liked the silver candles to bring a little glitz to the table for the "festivities".
I used my white Spode Mansard china along with small Arcopal salad plates. I purchsed the plates on eBay. They photograph well and I like the look of blue toile.
I finished the tablescape with some blue goblets and some blue and white candleholders.
All in all, a simple tablescape for the fourth of July! If you would like to see more tablescapes, please visit Susan at her blog, "Between Naps on the Porch".