First, welcome to the forum. You will find that you get very honest feedback here, some of it can be a little "edgy", but remember that folks are just trying to help you improve.
First impressions: First one) In this one, the flower looks just a bit oversaturated. Second one) The out of focus flowers on the left detract from the over all image. I would have tried to just isolate one flower as my main subject. Third one) Not too bad, but the flowers are just a bit blown out or overexposed.
In future postings, you will make it a lot easier for a reviewer to comment on your images if you number them.