Every time I get to week 6-7 of veg or later I sta...

Plant captures light, collects energy, mixes nutrients with captured light energy it catches from the air to make "carbohydrates" Carbo"Sugar" - Hydrates"water". Plant makes "Sugar water", called glucose glucose is then mixed with nutrients and carbon to form amino acids, enzymes and more complex proteins. Vast portion of a plant's daily energy consumption goes Into creating these complex aminos and enzymes. I'm not sure of % but I've read it's very labor intensive for a plant to create its own aminos. By supplying aminos, enzymes, lots of yummy glucose in various forms should alleviate a huge workload on plants when provided with correct aminos/enzymes the plant can focus its energies on bud production instead.

Possible your overwatering. Also check the ph level of the run off water

Hey mate, you could use micro-nutrients such as Fox Farm Bush Doctor Microbe Brew, Botanicare Vitamino, or a product that contains chelated iron, zinc, and manganese. And you could try another fertilizer for that phase with higher N in it, or add stuff like blood meal which is basically pure N.

Consider what you change heading into bloom and add that to the list of possible causes. Ramping up P/K too high can have negative impects. Locking things out or too much buildup of P/K which leads to chlorosis in new growth with thinner blades among other symptoms. based on ratios, probably too much P even if that is not a cause of the visible symptoms. FF trio is just a shitty ratio, that's all. It'll take more trial and error to figure out a formula that works and almost awlays need to add a source for caclium with their products if the soil can't provide it by itself. the plant may have both buildup and deficiency from the diet, which makes diagnosing strictly from visible symptoms difficult at best. This stuff doesn't happen overnight, so consider the changes you made 2-3-4 weeks ago or even longer. Maybe it's your bloom formula over long-haul that simply is not balanced properly for a wide variety of plants. just becasue it works for "1" plant doesn't mean it is a good formula or that the problem lies in the plants it doesn't work well with - that's called hubris. the fault almost always lies with our actions and not the plants. i'd find some people that successfully use FF trio and mimic what they do and adjust relative to your local variables -- the plant will dictate what to do. Or, better option... buy fertilizer that doesn't have a cartoon graphic like it's trying to market sugary cereal to children, lol. "Marijuana" branded stuff is usually poorly thought out, esoteric formulas that don't work as well as existing general knowledge of fertiization needs/methods and over-priced. Fertilizer is made from cheap ingredients athat are commodities. that means that unless you are working with some oddball products, there is no such thing as quality differences.. paying more doesn't get you better fertilizer. Just buys some fancy clothes for the emperor that nobody else can see.