Yellowing, rust spots are continuing. +rep for assistance.

anon1122

anon1122

Well-Known Member
The strain is dutch passion white widow. Day 33 of 12/12. The ppm is at 850-900 and the ph is 5.75-6.00. I am using the entire fox farm line of nutrients. And 1 tsp. per gallon of calmag. Lighting is a 600w hps approx. 9-12 inches from the tops. There is a fan beside them that is on 24/7 on low. They move all day long. I flushed them for 24 hours the other day with plain RO water with some florakleen in it and a touch of cal mag. Then refilled the res and started off with 700ppm nutes and worked my way back up. I am really getting nervous now because it is not showing any signs of stopping. The very tips of the leaves are curled straight up. Rust colored/black-ish spots are everywhere. No bugs are in the room, I have went over it with a microscope, and I can't find a thing. What do you guys think?
 

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PANGcake

PANGcake

Active Member
anon1122 said:
The strain is dutch passion white widow. Day 33 of 12/12. The ppm is at 850-900 and the ph is 5.75-6.00. I am using the entire fox farm line of nutrients. And 1 tsp. per gallon of calmag. Lighting is a 600w hps approx. 9-12 inches from the tops. There is a fan beside them that is on 24/7 on low. They move all day long. I flushed them for 24 hours the other day with plain RO water with some florakleen in it and a touch of cal mag. Then refilled the res and started off with 700ppm nutes and worked my way back up. I am really getting nervous now because it is not showing any signs of stopping. The very tips of the leaves are curled straight up. Rust colored/black-ish spots are everywhere. No bugs are in the room, I have went over it with a microscope, and I can't find a thing. What do you guys think?
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i had some of that on my last grow in bloom...i think its Phosphorus deficiency...but i grew in soil?!

edit: i just looked at pics...didt see them earlier....ditn really look like that...sry
 
Woomeister

Woomeister

Well-Known Member
it is not a deficiency. I would personally advise you quit the cal mag and flush. Magnesium overdose is my guess, causes iron to become immobile which shows as severe spotting.
 
OpTikPhiber

OpTikPhiber

Well-Known Member
Woomeister said:
it is not a deficiency. I would personally advise you quit the cal mag and flush. Magnesium overdose is my guess, causes iron to become immobile which shows as severe spotting.
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Interesting diagnosis! I say that because in soil I had a VERY similar spotting problem this last grow. It started almost over night on like day 28 of budding. I watered with plain water and had lush green plants. Thought it could have only been something to do with the tap water. iron huh? hmmm.
 
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