Good work, here is my opinion of what I noticed.
The one titled "the last flowers of summer" is not very well positioned. I have never had proper photography lessons, but when you look at that picture, you see several stems with slightly weird effects going on, and then a lone yellow flower at the very edge of the picture, and a few others scattered, facing outwards. When you take photos of flowers, try to frame the actual subject. Lighting, on the other hand, seems good.
The "longboard lifestyle" is a pretty good choice of subject, but the way you have edited it doesn't give a positive effect. I would like to see the person's figure and the board in sharp focus, especially as the focal range is so narrow. The tone is right - it conveys that late summer feeling, but it feels overdone.
Make sure your editing is not as important as the actual photos, only use it to enhance them.
Again, these are only my opinions and I may be completely wrong! :-)