Interesting shot here Robbo and I can't really add much to what MB has already said.
Do you not have a Depth of Field preview button on the E500 (assuming that is the one you were using here). If you do, this is a useful button to press when setting up the shot. Basically it stops the lens down to the aperture selected so that you can see through the viewfinder how much is sharply focused. I only mention it because it's surprising how many people forget about that particular button
If you can get another shot in a similar style to this 2nd one but in good sharp focus across the seed head then you'll have a very good shot for your files
Cheers,
Rob