Molassas, is wonderfull for any grow. During bloom if you are useing sea kelp or guano. Make a little batch or tea useing only un-sulfered molassas, This will clearly be labeled as such. Guano really makes your flavors pop. molassas does as well. Another big benifit to molassas, is it helps break down those nutes that create big flavorfull buds! Also, your flowering plants look AWSOME in day 31. Dont worry about the fattening up process so much, they will get there! meanwhile de-clorinate some water and brew yourself up a batch of tea useing gauno. kelp if you want to. P-k in quantity at about this point will help tighten and harden your buds.
Do it now, and so you can perform a flush two weeks before your target date, (if useing a chem nute regiment) flushing organics, is not as important unless you plan to re- use that soil for the next batch of clones. cudos on your grow! peace.