^+1
Also, watch your background. The dark tree and whatever that structure is to the right of it make a less-than-pleasing background. Sometimes you just have to work with what you've got, but it looks like if you had moved a bit to the right to shoot this, you could have the hyacinth in between the two trees and get it with the sky behind it, plus you'd lose that man-made structure entirely.
I also think this might be improved by including the entire plant, stem, leaves and all. Hyacinths aren't that tall, so you've essentially cropped its "feet" off. I tend to look at many of the things I shoot--flowers, birds, etc--the same way as doing a people portrait. If you're going to crop something out, do it intentionally. Here, to me at least, it looks unintentional, like it just didn't quite all fit in the frame. Either get the whole plant in the frame, or concentrate on just a few blooms. For instance, you could maybe focus on the three blooms on that stem to the right and JUST get them in focus in the frame.
That said, hyacinths are pretty hard to shoot well, imo. They are gorgeous flowers but it's hard to find a really good composition for them.