It's a lovely drawing. You could try drawing a less solid blue background, leaving some of the whiteness of the paper visible for the petals of the flower.
Alternatively, a darker background could make the white of the flower appear brighter. It really depends on the effect you're looking for. Layers of colour, then Chinese white, then colour helps to intensify the underlying colour.
You've made a lovely delicate drawing and have captured the shine on the leaves very well.

Bernadette

Wow that is a lovely drawing, amazing detail and reality . Very good job keep it up.

YOU HAVE GOT THE EYE OF AN ARTIST!!! IT IS SOMETHING TO ENJOY YOUR WHOLE LIFE.YOU WILL ALWAYS GET BETTER AT WHAT PAINTS TO USE,OR PAPER CHOICES AND TECHNIQUES.BUT YOU EITHER HAVE THE INSPIRIATION,AND THE EYE,OR YOU DON'T.YOU DEFINITELY DO. YOUR PICTURE IS VERY GOOD!! BEST WISHES TO YOU. JOAN