What's wrong with my plants? Dark spots and yellow leaves

mouhmad

New Member
these dark spots started showing up and the leaves are turning yellow and dying. Any idea what it might be either cal mag, salt lockout, magnesium, manganese im just all over the place
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I think no one is responding because you gave no info.
Ph
Temps
Nutes used?
Medium?
Any additives?
How old are plants.
 
Temps 76-78 lights on 65-68 lights off
Nutes are tiger bloom 2 tsp big bloom 1 tbsp
Growing medium- promix
12/12
3 ft from light and finishing week 4 of flower with really nice buds it's just the lower/mid fan leaves atm
19 plants in 5 gal pots
Haven't checked ph yet which I think might be the problem but would I need to make up for it with a supplement or just flush and check ph from now on?
I feed every other watering (once a week)
About to finish week 4 of flower
 
That and overall pics of the affected plants would help. I'm thinking they look root bound which is causing uneven distribution of nutes
 
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