I agree with the above, Underexposed, and would have like to see the stems isolated a little but I make the same mistake.
What I do like though is that you used the rule of thirds well, and the rule of diagonal lines. Also why is the horizon on the water not 100% level, that would be my #1 thing to fix and then just bump up the exposure a little. maybe 2/3 - 1 stop.
Did you possibly have the exposure set for it to be sunny and then the clouds rolled in to leave you less light?