Burnt, twisted leaf

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Greengrowgirl1

Member
Would like to know what wrong with my plant please. Leaf has spot that turn from light to darker. Some leave twisted. Ppm around 400 to 800 ph 6.2 DWC
 

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calvin.m16

calvin.m16

Well-Known Member
Greengrowgirl1 said:
I had it at 800 then drop at 400 then back to 800 but nothing improved. Temp 16 night 23 day. RH 37-40 day 40-60 night.
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I have similar looking leaves on a cola that was really close to the LED grow light. Looks almost like Calcium Deficiency but it's not.

I'd start with keeping your feed at 1.5-2.0 EC (750-1000 PPM range)
Keep temps between 20-25 C (68-77 °F (night-day) and humidity in the 45-50% range (night-day).

Your temps are on the low end and your humidity is very low. That can add a lot of stress on the plant.

You want it where temps go up, humidity goes up and vise versa. The way you describe your environment your humidity goes up as your temperature goes down, that is the opposite of what the plant needs.
 
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Greengrowgirl1

Member
The strain is Durban poison from Cropking seed though I doubt its authenticity as it is so short while the real DP is suppose to be 6 feet tall.
The humid is 35-40 day and 40-60 night and I can't change it. The reason is this is DWC, so in the day the water can't be too warm so I vent it out more to keep water cool. In the night I can vent less the keep plant warm so humid build up in the night.
I just chat with Oldmember , did not know why it did not show up here but h said should be toxic built up and I think that is the most reasonable explanation so far .
 
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