good shot Ted. but you know there will be buts
Firstly try using a wider angle lens like sigma 10-20mm or for full frame the 17-40mm lens and put the aperture to f22 this will ensure sharpness front to back as long as you focus on your horizon or a little before, if you did not already manual focus then do so as this is more accurate for this type of shot.
In this shot i would get the horizon in in the middle by chopping off the out of focus poppy's in the foreground, the only reason you have soft foreground poppy's is because you need to use a wider angle lens.
This is only my observation but i think the tree needs to be put further to the right for a better composition.
Also maybe you could bring out the detail in the clouds a little with burn tool.
I have uploaded a mod for you.
I hope this helps.