Flowering issues

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-Problem: bottom leaves have been yellowing also getting some brown spotting.
-Medium/grow method: soil FFOF in a 3 gallon pot. tested runoff and ph was at 6.3, ec 1.4
-Feed and supplements used: FF Trio following https://www.autoflower.org/threads/the-way-of-the-fox.52860/ had burn on them so last feed was cut to 2ml per gallon of tiger bloom and 3ml of Big Bloom. also using recharge microbes
Water source: tap water run through filter.
-Strain and age zkittles and blue dream autos day 47 almost fourth week of flower
-Climate: daytime 78-80 night 74-77f and RH sits between 42-50

- Light used: 260w Dimmable QB w/RSPEC
-Additional info:
plants both started this maybe a week ago and i fed higher dose of grow big thinking it would take care of N def but all i got was nute burn. cut the grow out this time but things are only progressing. Thanks guys
 

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I dont grow in soil,
but heard the FFOF soil mix is too strong.

The yellowing you see is normal for that stage, that being said you could supplement it with more Nitrogen - I would be careful with that kind of rich medium and wait for an expert advice.

I wouldnt bother about the brown spotting if it's just one or two leaves.. looks fine to me
 
I dont grow in soil,
but heard the FFOF soil mix is too strong.

The yellowing you see is normal for that stage, that being said you could supplement it with more Nitrogen - I would be careful with that kind of rich medium and wait for an expert advice.

I wouldnt bother about the brown spotting if it's just one or two leaves.. looks fine to me
]
you have heard correctly with the FFOF it has been a journey bringing my ppms down and my ph up. this is my first grow so its been a lot of learning for me but having a bag of soil at 5.3 ph and nearly the same EC was not a fun start. thanks for the advice! next grow im going with BioBizz light mix.
 
1 ml of cal mag is my suspect. LED lighting can increase cal/mag requirements, and some cannabis strains can be real hogs. Cal/mg is ALWAYS in whatever goes in my pots, feeds, between feed waterings...
 
This one you need to do a little research, I don't run a salt based nute line, and can't use standard cal/mag, but I just took a peak at the old bottle of botanicare on the shelf, it shows in flower 3 to 5 ml per gallon.
 
With the line I use I'm at 100 % of the replacement product as acseedling, and up around 150 to 200% in late flower.
 
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