Possible Potassium deficiency? PLEASE HELP!!

Plants exhibiting extreme nutrient burn. 4 weeks into flower. Setup is as follows:

Soiless medium (Promix/Sunshine mix) 5 gal grow bags
pH: 6.3
Temp: 78°F
Humidity: ~50%
CO2: ~1200 ppm
Strains: God bud, Green crack, Dutch Treat, Hempstar
Nutrients: GH flora series (44 mL/100L Grow, 88 mL/100L Micro, 132 mL/100L Bloom) + Florolicious + (25 mL/100L) , Monster Bloom (30g/100L) , Cal Max (125 mL/100L)

Any help is greatly appreciated. Will send you gold/hookers for any helpful advice!

Sloewdiggz said:

Nutrients: GH flora series (44 mL/100L Grow, 88 mL/100L Micro, 132 mL/100L Bloom)

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I don't think you're feeding them enough. The GH label says 132, 264 and 396 respectively. The label's strength is too strong. Reduce those numbers by 30% (I've grown at 30% strength, it's good. But, many go to 50%). That would be 88, 174 and 261. Twice what you're feeding.

It's way to early to feed Monster Bloom, a 0-50-30 "booster." Those are used once or twice near the end. If you're not experienced growing, I wouldn't use it at all. Just get through a grow with as few variables and complications as possible.

What kind of lighting do you use? The buds don't look very developed for 4 weeks flower. If you've been using the "booster" for awhile that could be why.

Agreed, the ppm of the nutrient solution is coming out quite a bit lower than normal (900-1050 compared to ~1350 using the GH label schedule). I used the GH label schedule last time and had similiar problems, but they didn't show up until week 5. Decided to use a schedule which is being used by other growers I know quite successfully (see below).

Using 600W hps, and lots of them. They are underdeveloped because of the shock. Also the strain in this photo is a 9 week flower and starts to build a bit later than others.

Sloewdiggz said:

Decided to use a schedule which is being used by other growers I know quite successfully (see below).

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You must've misunderstood something about that schedule, or I'm misunderstanding your use of it. If you're using bloom booster with half-strength nutes at this stage of growth and especially doing it continuously (not just once or twice at the end), it's not going to be successful.

Also, the GH label PPMs are too strong. People usually cut it in half. But, I followed the useless schedule" when I used GH 3-part. 800-1100 was where I was at. That schedule does about 2/3 the GH label.

You might compare your schedule to the "useless" schedule.

Yeah it didn't make much sense to me either, but like I said I know at least 3 other growers who are using this exact schedule in almost identical growing conditions and having great success. Back to the drawing board I guess.

Comparing the ratios, I definitely see where you are coming from. Thanks for the info.