Fun with Photoshop

This photo is really two photos combined. The original of the couple didn't have the best backdrop, so I threw them into a photo taken about 20 min later. The background is actually a close up of potted lavender, so my question is....does it look believable?! I wanted it to look like they were standing in a field.  I feel like it looks sort of "Gone with the Windish". Have I just been staring at this for too long?! I think it might be time to step away from the computer.....