Dirt, processing overall looks good on my monitor, just a bit dark, but I don't think that is a major issue for web as most monitors are too bright anyway and being a little darker suits the mood of the image well, as I suspect that mood perhaps shouldn't be too bright and cheerful here.
Asa, I like the contrast between hard concrete and the lovely Muscari. They really pop! It's a good portrait of how nature eventually conquers manmade constructions, little by little, step by step. The selective focus works well, but here is the only weak spot I found as in almost all situations you ideally would like to have the foremost flower(s) in sharp focus. You do have the grapewine? in excellent focus and had you shifted focus you wouldn't achieve that, so overall I'm not sure if shifting focus would be better or not. I can however say that I'd theoretically prefer to have both the front Muscari blooms as well as the grapewine in focus. But it's not a major issue and it doesn't break the image.
Otherwise it all looks very good to me. There is a simplicity(simple is good when it comes to photography) to the composition, with the strong use of a diagonal and the repetition of the muscari throughout the frame against the almost monochrome concrete canvas being particularly appealing to the eye. A very nice image indeed!!!
