I keep having leaves brown up and die
off this happened my last run I started to wonder if they were going to make it, surprisingly they did and buds were freakin’ delicious I’m on my last 5 days I would just like some suggestions so I don’t do it next run it Al started about 2-3 weeks into flowering and just progressed! "Buds look great tho?IMG_20200325_113212871|666x500
A support ticket will help us diagnose. It looks like nute burn, but I’d like to see support ticket info before I commit to that. Also, are you still feeding nitrogen?
• What strain, Seed bank, or bag seed
• Method: Soil w/salt, Organic soil, Hydroponics, Aquaponics, KNF
• Vessels: Pots, Grow beds, Buckets, Troths
• PH of Water, Solution, runoff (if Applicable)
• PPM/TDS or EC of nutrient solution if applicable
• Indoor or Outdoor
• Light system
• Temps; Day, Night
• Humidity; Day, Night
• Ventilation system; Yes, No, Size
• AC, Humidifier, De-humidifier,
• Co2; Yes, No
Do you know your runoff PPM? Are you still feeding nitrogen?
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Have you been taking runoff readings. You’re using OF soil which is pretty hot but nutrients will be depleted this late in Flower. I don’t see that you are using any nutrients. It’s important to know what your ppm’s are coming out at. Same thing with ph. It’s 6.5 going in but may be lower coming out.
Sorry yes using foxfarm grow big, big bloom in veg and big bloom, grow big, cal mag in flower I add the tiger bloom along with foxfarm trio sesame, seed, Cha ching, beastie bloom and molasses"replacing cal mag
And yes run off was about 1700 and oh came out 5.5 -6
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From my limited experience 5.5 to 6 is a little low. But may not be what is causing current issues. I’m thinking along the lines of what @MidwestGuy said the severe browning of leaves looks like nutrient burn. You also have some yellowing of leaves which could indicate lockout caused by low ph. Something else I could be wrong about but I believe molasses is for root microbes not cal mag. So if that’s the case you could be also experiencing low cal mag.
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Molasses has both calcium and magensium, but I don’t know that it is in sufficient quantities to get the job done. You should really be using a cal/mag product. That said, I doubt it is a cal/mag deficiency. If it is then the deficiency has to be a profound one, and I doubt that is the case.
You should really stop feeding the Grow Big at this point. It has too much nitrogen for the maturity of your plant. The darkened leaves, curling, and browning edges lead me to believe it is nitrogen toxicity. Your PPM is a little high, but not too far out of line.
Let’s ask @Myfriendis410 to help here. He has a lot more experience than I do.
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I was just getting ready to do that and saw you replying. 
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You’ve got nute burn. What water are you using, what is the TDS in that you are currently feeding and the exact numbers. (I always adjust to a target TDS).
PH out is a bit low but not out of range. I would guess the plant was over fed at some point 3 weeks or so ago and now seeing the result. Water only, PH’d to 6.5 for a week or so then resume with about 1/2 strength. FYI when I’m growing in coco (which demands higher nutrient load than soil) my peak TDS in veg is 750 ppm and in floer 1,050 ppm. You also have to add in any TDS present in water supply so if you have 300 ppm water and feeding a flowering plant you can only add up around 700 ppm of nutes to reach 1,000 ppm. Gotta count the water TDS which is why a lot of folks use R/O.
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I wanted to ask you about molasses. Is it a suitable replacement for cal mag. Or is it for root microbes or both.
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I could be wrong but don’t believe molasses offers any appreciable amount of calcium or magnesium and is primarily (as you said) for microbial health.
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