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Question on leaf curling
Fiz_Gigstarted grow question 3 years ago
My plant was flushed last week and has now used all the water from that. She showed some curling tips this morning. Any ideas what's going on? Light set for 40 DLI. If she needs something, I want to add it today while she's thirsty. Thank you for your help!
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m0useanswered grow question 3 years ago
Cannabis can take 60DIL and above in most test settings.
curling leaves is heat stress though. however 26c is not that hot. and humidity is proper.
It does seem to only be the upper leaves of the plant vs the bottom.
It could be that the highest tips of the plants are experiencing higher temps then the rest of the tent.
where is your sensor located to monitor temps? do you have an extra one for fault checking?
week 5 was 18" distance from lamp and this 8th week its 12" this could be the main cause of this extra stress.
at what height was the 40DIL calculated with your setup? maybe need to return it back to its older settings.
Best of luck
Fiz_Giganswered grow question 3 years ago
Thank you to all who looked at this question. I use a non-contact thermometer to monitor the temperature of the plant at the leaf level. I test top, and lower levels. Highest leaf temp I've seen is 75.5 F. The light itself at the driver is 80. I have a large exhaust/filter running plus an intake fan, both on at 24 hours a day. Nothing seems to have changed with Lucy since I posted this question, except she's gotten fatter. She's played some interesting tricks throughout her grow, so I tend to react really quickly the moment I notice something. (First grow jitters.) I'm currently giving her 35 DLI, I'm going to up that next week as I believe she is getting near the end.
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BraveheartGeneticsanswered grow question 3 years ago
Heat stress...Raise your light a little or reduce intensity to lower heat produced but at the cost of reduced spectrum. Bring in colder air from outdoors or air conditioning.
Although, looking at your diary you are not that far away from finishing. I would increase you humidity slightly so the leaves get a reprieve of moisture. I wish you luck
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Hashyanswered grow question 3 years ago
The curled leaves are from heat. I would use a nute with P and K in for the remainder of the flower.
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