you can go ahead an drop the formulex right now , that stuff is made for very small babies. (its just a weak diet for seedlings) So now that they are older an mature its just wasting the bottle.
the terra flores is a very good food in my opinion. keep using that at whatever strength you been using. (i think thats every watering right ?)
next time you water add the pk1314 at half to full strength and then do NOT use it again for at least 5 or 6 waterings. (2 weeks-ish)
i would use the pk1314 a total of 2-4 times per cycle. no more then that.... that shit is strong.
if you find that your species loves the extra pk , then you would just up your regular diet. instead of using more pk only.
all this is "dialing in" an could take years, but thats how you become the best. the part you have already accomplished is the hardest part of growing.
just remember that a plant always needs a balanced diet no matter what stage of growing your in. so just be careful with any foods that are not balanced. (pk only, bloom boosters, calmag, N boosters ect...)
soil