Hey Kostas,
I think this is an interesting abstract. I like where you placed the curve although I am debating if I want a part of it a touch sharper. I do think you need to work on the dark green area in the LLC......and smooth out some of the URC. A pretty pleasing abstract in my book!
Kostas, this is a very nice attempt at an abstract. If this were mine, I'd slice a tiny bit off the left side. If you look in the lower left corner you'll see where the whiter area of green comes down to the bottom of the frame - I'd slice it so that is the corner of the frame - maybe 1/4" in from your current edge.
Now take a photo of the whole plant so we can see it...I'd love to know what it is! ;)