I wouldn't and I wonder about those who receive them.
It seems controlling to me, like a DP is marking his territory. It also feels like a reminder (from him to her colleagues) that she's not allowed to have a professional life separate to him, or even a reminder to her colleagues that she's a mere woman, who's head is turned by flowers, rather than a serious professional.
Also, of the women I've worked with over the years who have received regular bouquets, I'd say the vast majority had horrible relationships and the flowers were usually an apology for awful behaviour that would soon be repeated.