Love your fabric choices. I would square them up first. You may also want to verify that you are sewing a 1/4" seam.
here are a couple of links on that topic:
http://www.quiltingboard.com/t-89997-1.htm
http://www.quiltingboard.com/t-150279-1.htm
Your leaves should have 1/4" of the white background past the points before you join your blocks. like the 2 smaller points on the right block. If you square the pictured blocks up, you will loose some of your points, but hey, have you seen what leaves look like in nature? Rarely perfect!!!