I've been using FF nutes (G-M-B) for years now. No ongoing problems here. I do a minor flush a couple of times in flower, tho. (4-5 gallons of plain, ph'd water, per 5 gallon pot) One major flush the week before harvest. I do follow a modified version of their schedule for soil plants, but every grow/grower/growroom is different. Were I inflexible with my nute schedule, my results would vary greatly. For instance: a sativa and an indica will likely have different reactions to the same quantity and ratio of nute mix.
Perhaps it's not the FF or the nute ratio that's giving problems. Perhaps it's the quantity of properly mixed nutes, that is added per pot. Or the frequency. Or perhaps overwatering.
With the Tiger Bloom, instructions say to use 2 tsp:gallon, per week. I add 1 tsp:gal twice a week. (Mondays and Thursdays)
For every gallon that I mix, I can fertilize two to three - 5 gallon pots. If I see run-off while adding the nutes, I know I've given too much. (nutes are too expensive to waste) Plain water only between feedings, slight run-off ok.
Even though I use well water, (8.1 ph from tap...adjusted down to 6.7 or so using phosphoric acid) I still add 1 tsp:gallon CalMag Plus, twice a month. Holds the darker-green colors better. Also, I only foliar if it is to correct a deficiency. Never do I spray, just for a humidity adjustment.
I also have taken to transplanting from a 3 gallon pot, to a five gallon pot, on the day of switching to 12/12. Being rootbound late in flower is a bitch, and up-potting has worked well for me. Slows transition into bloom cycle by adding the fresh soil, (a local mix...very hot:
Filthy Rich Potting Soil) but after a couple of weeks under 12/12, is bigger-n-better than ever, and right on track. (can/will cause some extra stretch, so cab growers shouldn't really do this, lol)
FF has never given me an excuse to switch, so am likely to continue it's use. Equally as important...I've found a nute series that works very well with the soil mix I use. FF is a quality product, and I've learned how incorporate it into my plants' busy schedule.
Am curious to see other's comments, tho.
