It looks earlier than that, try trimming some of the fan leaves to direct the energy to the buds. Also have you switched to Bloom nutrients. might try a bud ignitor with Potassium And Phosphorus To Maximize Flower Production.
Hi Jimbojetset , Sorry for the question but are you sure you are in the fifth week of flowering? From the images you look more around the second week. The flowers should be much more developed, instead they seem right at the beginning.