leaves curling up

rotannator

Well-Known Member
My plants are critical kush an pineapple express day 38 in bud i use coco perlite mix duth mast gold nutes cal mag add 2.7 flower ph 5.8 to 6 ec 1.8 to 2 temp 28 deg cel and so everything looks great n green but the leaves r curling up any ideas
 

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Buzz Buzzilla

Well-Known Member
Do you know what your humidity is at? what is your water source? How close are the lights to the tops, and lastly what are you using for an exhaust fan?
 

Mad_Prophessor

Well-Known Member
Id still like to know as these things help w heat and the plants ability to take high heat....got a few guys on RIU running temps that reach as high as 120f!
Ganja pretty much shuts down at 85 unless you are giving them a shit ton of CO2. It doesn't matter what other people have grown, it matters what you are currently growing. Every plant is different. Some get pissed easily if the temp goes over 82, some like it hot. Your girl, does not like it hot. When you read stuff online, read the same result from three different sources before you consider it to be anywhere close to accurate. Growing ganja at 120 is gonna produce some shitty looking, stressed out plants. Don't look for a three legged ballerina when it comes to your info, look for the $2 mexican whore. You know what to expect. ;)
 

Buzz Buzzilla

Well-Known Member
Ganja pretty much shuts down at 85 unless you are giving them a shit ton of CO2. It doesn't matter what other people have grown, it matters what you are currently growing. Every plant is different. Some get pissed easily if the temp goes over 82, some like it hot. Your girl, does not like it hot. When you read stuff online, read the same result from three different sources before you consider it to be anywhere close to accurate. Growing ganja at 120 is gonna produce some shitty looking, stressed out plants. Don't look for a three legged ballerina when it comes to your info, look for the $2 mexican whore. You know what to expect. ;)
I agree with the co2 although the member I spoke with didn't use it...he was in a green house so id assume that was natural co2...I'm from south florida where it's in the mid 90's everyday so everything better like it hot or die...there are somethings that most defiantly help with heat such as kelp extract or even a carbon spray...but obviously trying to bring heat down would be easiest quick fix!
 

Mad_Prophessor

Well-Known Member
One guy, one time does not equate to common or good. It is garbage advice on a unique situation that should never have been typed. It is not common, normal, or a good example in any way, shape, or form. They shut down at 85. Running your lights at night is probably the easiest way to lower your temps. ;)
 

EvlMunkee

Well-Known Member
82 is a bit warm but it is not the problem. Your problem is low humidity. Use a humidifier during lights on to raise it and the curling will disappear or at least get better. Here is a chart showing the ideal VPD range. It's a relationship between humidity and temp.
VPD chart.jpeg VPD chart.jpeg
 

Mad_Prophessor

Well-Known Member
82 is a bit warm but it is not the problem. Your problem is low humidity. Use a humidifier during lights on to raise it and the curling will disappear or at least get better. Here is a chart showing the ideal VPD range. It's a relationship between humidity and temp.
View attachment 3447448 View attachment 3447448
Low RH will not cause the leaves to curl. Some of my grows have been in the 20s to 30s for the entire cycle without ever curling. Curling like this is from heat stress A low RH isn't going to hurt your plants, it will just cause them to drink more and faster. Plants evaporate water based on two variables. How warm it is and how much moisture is in the air. A low RH will cause the plants to evap their water and food much faster than a high RH area. This can be a good thing as you can give them nutes and water frequently allowing them to get big, fat and nasty. You have to be more diligent tho. High Rh causes them to evap slowly. This can cause root rot, PM, or bud rot (depending on the stage of the grow).

However, none of this is supportive of the claim that the adverse condition the plant is exhibiting has anything to do with the RH and everything to do with the fact that it is too hot. But hey, what do I know...
 

Desr

Well-Known Member
Ganja pretty much shuts down at 85 unless you are giving them a shit ton of CO2. It doesn't matter what other people have grown, it matters what you are currently growing. Every plant is different. Some get pissed easily if the temp goes over 82, some like it hot. Your girl, does not like it hot. When you read stuff online, read the same result from three different sources before you consider it to be anywhere close to accurate. Growing ganja at 120 is gonna produce some shitty looking, stressed out plants. Don't look for a three legged ballerina when it comes to your info, look for the $2 mexican whore. You know what to expect. ;)
What about outdoors in socal? What about arizona? Landraces in Africa, Jamaica, hawaii. 85+ is a pretty normal occurence in alot of areas. With that being said, some pretty dankalank comes out of those places.

EDIT: But as stated, it is strain dependent. Over generations strains hardy themselves and adapt to their climate. And with taking advice, it is always best to gather as many reviews or opinions and see what the mass consensus is, with science in mind.
 

Mad_Prophessor

Well-Known Member
What about outdoors in socal? What about arizona? Landraces in Africa, Jamaica, hawaii. 85+ is a pretty normal occurence in alot of areas. With that being said, some pretty dankalank comes out of those places.
Ganja will grow anywhere, but it wont grow well anywhere. Landraces take 14+ weeks to finish and you will be lucky to get an ounce off of one plant. Care to make my point further for me?
 

Desr

Well-Known Member
Wow lets not be dickheads. Lol its the internet. Chill out. And if you can only get an oz in hot temps thats your business.
 

Mad_Prophessor

Well-Known Member
Wow lets not be dickheads. Lol its the internet. Chill out. And if you can only get an oz in hot temps thats your business.
You tried to argue a well known attribute of the plant and wonder why I put you in your place. Wake up dawg. Clearly, you are just posting something you have read and not experienced. It doesn't matter what temp you give a Landrace, they are not producers (especially in their natural habitat). I have been growing for 20+ years. You might want to listen to what I have to say instead of posting an idea that you read somewhere. I have grown Dr. Grinspoon with success and dozens of other strains. Have you even see a Landrace in person? I doubt it. I can appreciate your thoughts, but you need the experience before you try giving advice. What you reiterated reminds me of my daughter arguing just for the sake of it and contained not information or experience. It was just an argument without substance.
 

Desr

Well-Known Member
Ok. You destroyed this guys thread with your nonsense. On the internet. You sure put me in my place. I hope you feel accomplished. Have a good day!
 

Mad_Prophessor

Well-Known Member
Ok. You destroyed this guys thread with your nonsense. On the internet. You sure put me in my place. I hope you feel accomplished. Have a good day!
Yep, it was me posting nonsense. I just wish people like you, that don't know what you are talking about, would refrain from commenting so people like me don't have to correct you and give out accurate info. If that were the case, I wouldn't need to feel accomplished as you happen to believe. I only have great days. ;)
 

Desr

Well-Known Member
Plants over 85 do just fine. Airflow>temperature.
In conclusion. You are nobody to me. Stop quoting me please.
 
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