you want more phosphorous that N and K. 4-16-4 or somewhere around there would be a better fit for flowering.
Last yr I used 2-7-7 for cactus and it worked fine, this yr I've got 0-10-10 and molasses, just starting to flower now, read the stickies for help,good luck
i wouldnt relly go 0 N ur Plant still needs sum N. but a 4:4:12 isnt good ballance try a 1,2,3 like a 10,20,30 for ur flowering that should work great with ur plants but really it all on jst trying diff stuff and seeing what dse better thats how iv got my Nute System dwn