There are my "spies and operatives" that tip me off to interesting posts so I ascend from my subterranean crevis beneath the forum (the Commercial and industrial Section) to offer my sage* (the spice used in turkey stuffing) advice
So...a fashion shot. The soft sky lighting is fine and the catch-lights in the eye is a good strategy. The garden and flowers are a nice environmental setting- you don't necessarily need a solid background to bring out the jacket.
There is- a lot of overlap between portraiture and fashion photography. Think of it this way; every photograph makes a statement- the simple the better. In a portrait, the statement might be " a lovely lady in a fashionable jacket". In a fashion shot, the statement should be "a fashionable jacket with a lovely lady in it. In the latter statement, the emphasis needs to be on the garment. The light is good, the model's expression is excellent BUT I don't really see the LINES and CUT of the jacket. The frontal view showing the style, the cut, the collar or the way the opening flares at the bottom- those are the "selling points"! In an ad online, etc, you can feature that basic frontal view, as if the model is walking toward the camera. and add the back and side views if you wish in a montage or slide show kinda presentation.
Background management: If you move the model somewhat further from the background, use a wider aperture and create a more shallow depth of field the will be more emphasis on the pattern if the fabric. the yell flow picks up nices in the golden color of the fabric. When photographing a print, striped, or boldly patterned fabric, it better to subdue sharp detail in the background but it does not have to be totally obliterated of so-called bokeh.
Tru many "poses" and get the model to SHOW-OFF the garment- try different hand positions- may be holding one of the flowers but don't obscure or cut into the lines of the jacket.
Your model's smile is wonderful. There is a trend in some circles of fashion photography where the modes don't smile, seem aloof, or even somewhat P/Od. My question always was "the person is wearing a beautiful and oftentimes expensive garment- why is he or she so unhappy"?
If you have an opportunity to re-shoot, try some of these suggestions. I did a rough edit yo illustrate how a softer and darker background would work. You can either shoot in an area where the background is in more shade or darken it in post-processing.
I am not a fashionista BUT I have been hanging around with fashion coordinators, art directors, couturiers, and most of all my lovely wife for a long time and I have become very well trained. In the wise words of my wife "you are gonna wear THAT....to work today...! We all learn from our mistakes!
I hope this helps!