Help what is wrong with my plant?i noticed yesterday that just one of the four show this on the Fan leafes only no where else & i thouvht it was a rusting stain so i thought it was a Calmag Deficiency. yesterday i feed with 4mL of calmag & Ph of 6.6 any help on what i can do to make her bounce back? or should i wait a couple days to see if she bounces back? i cant tell if its getting better or worse. so i snapped these photos to see tomorrow if it improves.
Maybe its heat stress problem?? I messed up in the middle of the night i unplugged the whole set up for 5 min while i re Arranged my room & temp & humidity sky rocketed in just 5 min time.
5 min won’t do that. Looks physical damage from water or soil
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I used this white shark when i transplanted & i might have used too much & i have been spraying the leafes with plain Ph’d distilled water started doing that 3 days ago & yesterday i noticed the spots. maybe because i sprayed while lights were on?? using 600w viper spectrum LED at 19-20 inches away.
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@AAA maybe the spray??
If it’s just on the bottom leaves, I wouldn’t worry about it too much, especially if your runoff is testing within reasonable range. 6.6 pH should be good if that’s soil. If it’s coco, you should be closer to 6.0. It could be a slight deficiency. If I’m reading your meter right, the 91 high temperature is a problem, and could explain the canoeing/drying up leaves. If that’s 59 for a low, that’s too much difference between day and night temps. 52 - 92% is a pretty wide range for the humidity, too. Does your exhaust cycle on and off? I run mine 24/7, mainly to keep fresh air flowing. If it’s switched on and off, the humidity and temperature will fluctuate. I’d try to get the temp/humidity in the grow space more consistent. Also, be careful not to overwater. Try to let the medium dry out some before watering. Let them tell you what they want. Don’t feed on a scheduled time frame. Otherwise, the new growth looks good. 
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I would say.
Lighten up on them. @ 18 days they are just babies. They can take humidity at this age. How close to the plants are the lights? are these autos? Try to keep them just under 80% , don’t overwater/feed; let them get thirsty.
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thank you guys for the help! i will check up on gals as soon as lights turn on. growing in foxfarm ocean forest medium with added organic perlite. humidity only dops below 60% when i open the tent door. & the 91 degree is because of the 5 min the tent was off while i re arranged my room. other than that it never rises above 80% & never drops below 65%
fans are running 24/7 & these are Feminized seeds. i stop spraying & im keeping my hours solid & making sure if she grows taller i raise the light & always have it at 19-20 inches away from the top of Cannopy.
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