Good attempt! Just a few notes:
1) Take care to straighten your shots. I noticed it's slanted slightly (look at the black bar at the bottom against the wood). I find this wood distracting and feel the photo would be stronger with the wood removed.
2) I find the plant a bit soft and has motion blur. Have you considered going up to ISO 200 or opening the aperture a little bit so your shutter speed is a tad faster? I understand this defeats the purpose of a long exposure but the plant would look better to me if it had less blur to it.