Sometimes, taking your wife to the roses is better than taking the roses to your wife. Remember that.
I employed the "Rule of Thirds" for this composition (in a not-too-strict fashion). I allowed the green color to run through the frame about 1/3 of the way down from the top and centered the rose bush at about 1/3 of the way from the right. A clean top and bottom edge of the frame are often welcomed.