Please don't tell me you're putting that as a background for a "logo".
If so, she must be hoping it's a pot field.
Why not just use the image in the original post? It's sufficient to allow enlargement, especially with a spline fit algorithm such as PhotoZoom and a host of others. I take images of approximately that size to billboard dimensions using the proper software.
do you use the 110 percent method on photoshop? or what software do you use?