buds not forming

I apologize if I make any mistakes, but it's my first post. Hello! I have a problem with flowering, I have set the 12/12 cycle for about 2 weeks, in a short time the first pistils came out, but it is now a week that they have not grown and have remained millimetric, and some would even seem to...

I’m on to my third grow this year and so far all of the strains I have grown apart from 2 have shown the exactly same problems. The best way to describe the problem is the plants produce lots of leaves and look very healthy both in veg and flowering, no deficiencies showing at all. Once in...