DNF is an odd charted line. Using only the base formula's is interesting.....
The ratio's on Massive don't look like they should be making the yellow happen but, formulations between the 2 maybe doing some locking and blocking of available nutrient.....That would create that problem...I don't really like the "Terminator" product for use on cannabis.....
You're in regular soil..correct?
What one?
Lets start with talking about a line change....
Skip the overpriced and watered down AN line...PLEASE!
For working with GH and soil.....I always liked what I could do with the Flora Nova 2 part! Thick and goopy, so you have to shake very well every time you use it.....But the nutrient sources are great, with real nice ratio's. Very nice price too!
Right now, I am seeing simply killer results from the Botanicare "KIND" line from many friends and more are changing over to it from seeing others results from it! From looking at the ratios' and feeding charts, it's simple to see why,,,,they have balanced the ratio's and charting specifically for cannabis! You will have to do some minor "when to change to bloom nutes" with some strains BUT, that's called dialing in for strain needs! I can not say enough how impressed I am with this lines results!
The folks using it are only adding Dyna PRO TEKT Silica and use my home made formula "Sweet Raw" at about 1/2 to 3/4's my feeding suggestions for it.....search the site here for "home made sweet raw" and use my screen name as the filter to find that. This formula will save you 64.00 on a gallon of it!
The KIND line is another less expensive choice.
My go to synthetic for years was a Dutch oldie! HESI nutrients! I would drop the ROOTS and the SUPER VIT and substitute a good organic kelp extract (Maxicrop seaweed) and had fantastic results....This stuff is not cheap!
As far as blasting or boosting near finish.....I liked a mid P, High K around 0-9-18 or a 1:2 ratio.....I would add this at 1 feeding at the start of week 6 - only once! and again at week 7 - only once! This worked about the best I've tried as a booster. High feeders can take a shot at the beginning of week 5 and do as above......It's something to try and use as you zero in on how well it works for that strain. How ever the first suggested use is safe and true. (I say week 7 because the plant always go 1 or 2 weeks longer for me. So yeah, the plant is able to "use" it.)
Atami makes a 0-9-19 supplement called Blossom Builder.....Not cheap but you might try emailing the company for a sample....to start.
There's a start....
Good luck!