I think your border is to bold. There is a lot of yellow and green in this picture already and you just added more to it with the border. Too much and it's very distracting when I look at the flower.
I like your image very much - the closeup, lighting, colors, detail. For me though, your border detracts and all I can think of when I look at the border are John Deere tractors - same colors. Maybe if they were thinner, it would work better for me. 6