Northern Lights Auto

S

somec

Member
Hello, this is my NL auto around 8.5weeks from seed. Been having these strange dots for a while and it seems to be getting worse. Medium is coco coir with a little bit of perlite. Light schedule is 24/0 , if I do 18/6, moisture goes too high in the dark period. Also feeding Flora Trio series at 1/2 strength, last feeding was full strength(6-700ppm). Used to feed daily but out of fear of root rot I feed them Every other day now. 5 gallon textile pots. Using RO water with a little bit of tap water to raise my ph to 6-6.2. Water before nutes is around 70-80ppm. Tried adding cal-mag doesn’t seem to do anything. I did a flush when dots started to appear a week ago. Also the leaves that are not exposed directly to the lights are darker and in good shape overall.
 
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Nutty sKunK

Nutty sKunK

Well-Known Member
somec said:
Hello, this is my NL auto around 8.5weeks from seed. Been having these strange dots for a while and it seems to be getting worse. Medium is coco coir with a little bit of perlite. Light schedule is 24/0 , if I do 18/6, moisture goes too high in the dark period. Also feeding Flora Trio series at 1/2 strength, last feeding was full strength(6-700ppm). Used to feed daily but out of fear of root rot I feed them Every other day now. 5 gallon textile pots. Using RO water with a little bit of tap water to raise my ph to 6-6.2. Water before nutes is around 70-80ppm. Tried adding cal-mag doesn’t seem to do anything. I did a flush when dots started to appear a week ago. Also the leaves that are not exposed directly to the lights are darker and in good shape overall(see last pic).View attachment 5017524View attachment 5017525View attachment 5017526View attachment 5017527
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Light stress. You said it yourself, bottom leaves ok.

You are giving them 2x more light than a photoperiod. Raise your light or add a night cycle
 
S

somec

Member
LeastExpectedGrower

LeastExpectedGrower

Well-Known Member
Also, Check your Flora Trio schedule (use the PDF online not the one on the bottle). I've been using it for a couple Northern Lights autos I'm growing and they don't like to go above about 550-600ppm for feed. I've been using the 'light' schedule at half strength to be in that range. Any more than that 550-600 range and I get burning.

No comment on the frequency since I don't do Coco.
 
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