hello andrea! i really liked this photo, but i thought there wasn't enough contrast in it (for my liking anyway), so i hope you don't mind, but i had a go at it in PS... (just adjusted levels a bit, and used the brightness/contrast tool too)
Really good shot here Andrea - I love the natural light... I only take natural light shots, never ever use a flash - because the lights and colours are so much prettier! The different sized transparent vases are a good idea to give that more dimensional feel to you pic.