Is it overwatering?

[Deeznutzz]

Plz good ppl help me out! This is my 1st grow ever.
My NLs are nearly 7 weeks old grown in 4 gallon pots, 100% coco. Lately I been feeding them canna A&B 1.5 ml/lt Carboload 1 ml/lt and ph usually at 6.0 to 6.3 no calmag used so far cuz A&B apparently have extra calcium and magnesium. Temps are 18-25 rh is 60-65
The tallest plant is 1 meter tall and the leaves are drooping at the top and I wanted to know if you guys think I might overwatering or anything else you think I might be doing wrong to the plant.
I'm using a 600w hps bulb in an air cooled hood 20/4 cycle and another thing i wanted to ask is if its normal for an auto to get so tall like the light is sitting 1 foot above the plants and it cant be raised any higher like that's crazy I thought they would only grow to half of their size

 

[hashead]

Looks like heat stress imo, I had a similar issue with a leggy sativa. I run a 400w hps and use a 10" fan to blow cool air between the bulb and tops. Sorted it out no problem. Looking at the 3rd pic id say ya need another fan or 2, and maybe more air extraction near the top of your tent.

(The increased airflow from the fans will also stimulate bud growth, cannabis is air pollinated and so the plants can sense the airflow and will produce more pistils to catch more pollen, when these pistils age and die back they form calyx, these calyx make up the bud. Basically, more airflow, more pistils, more calyx, bigger buds)

 

[Deeznutzz]

I thought I got rid of the heat stress by lifting up the hood and the humidifier lol the top leaves of the tallest plant were curled up like trying to shade them selves. I got t 3x 6" fans but they don't spin and at the moment they are all facing upwards trying to push the heat back up. I went and got me a 16" wall fan but it was too big for my tent so I'm thinking of getting a tower fan today maybe it will help

 

[hashead]

I thought I got rid of the heat stress by lifting up the hood and the humidifier lol the top leaves of the tallest plant were curled up like trying to shade them selves. I got t 3x 6" fans but they don't spin and at the moment they are all facing upwards trying to push the heat back up. I went and got me a 16" wall fan but it was too big for my tent so I'm thinking of getting a tower fan today maybe it will help

Its a pain, im waitin on a lil extractor fan and some tubing so I can extract hot air up top and blow it back in the bottom. If ya can maybe dedicate 2 of your 6" fans to blowing cool air through the space between the bulb and tops? Use your other 2 + the tower fan to increase airflow amongst the plants

 

[Deeznutzz]

They looked straight in the morning but I never got to take a pic.
I got the tower fan and placed it in the corner on top of something to make it higher.
These new pics are from now but they were in their 4 hours sleep so I think they are meant to look a bit droopy.
Also I've noticed that a few hours after feeding the leaves will perk right up but I don't know if I should be feeding them everyday as I don't want to cause root rot.

 

[hashead]

They looked straight in the morning but I never got to take a pic.
I got the tower fan and placed it in the corner on top of something to make it higher.
These new pics are from now but they were in their 4 hours sleep so I think they are meant to look a bit droopy.
Also I've noticed that a few hours after feeding the leaves will perk right up but I don't know if I should be feeding them everyday as I don't want to cause root rot.

Looking at the second pic there it looks like the light is a good distance and its a cool tube. Heat might not be the issue, if your airflow is too strong that can cause clawing too. Ya want the plants to feel a light breeze rather than a stiff wind. If a leaf is flapping about its too windy, there should only be a little movemonet amongst the leaves. Maybe "bounce" the air from your fans off the tent wall? How often Nd how much do ya water?

 

[Justin Credible]

My first thought was they are too wet, maybe the first set of pics was taken right after watering?
Always try for a good wet-dry cycle and maybe water less frequently. The plants need a bit of a dry-period in between waterings, it allows for them to really suck the water up once watering time has come.
I myself usually try and wait as long as i can before I water, I want to see them a little dry and right before they get angry with me and start to wilt, I water them thoroughly and within 30-45 minutes they are thankful and happy!

Heat stress could be an issue with HPS but 600w in a cooltube at 1 foot from canopy should be no problem for a plant of that age.
And yes, auto's get big if you grow them right!

 

[Deeznutzz]

I

Looking-glass at the second pic there it looks like the light is a good distance and its a cool tube. Heat might not be the issue, if your airflow is too strong that can cause clawing too. Ya want the plants to feel a light breeze rather than a stiff wind. If a leaf is flapping about its too windy, there should only be a little movemonet amongst the leaves. Maybe "bounce" the air from your fans off the tent wall? How often Nd how much do ya water?

For the past 3 days I fed them everyday because I thought I was underwatering them and I tried getting at least 20% runoff.
Before these past 3 days I used to feel the weight of the pots and was watering them every other day. I only started watering them everyday cus the big one looked a bit droopy.
My exhaust fan is running at its max power as I don't have a way to turn it down. I don't have an intake fan running fresh air into the tent just left one of the top holes open. My tent doesn't have a bottom hole.

 

[Time]

I probably shouldn't chime in because I'm pretty new and and grow in soil. My understanding from the coco growers is that you can't over water in coco and you should not let coco get dry. But, like I said, I'm new and grow in soil.

 

[Deeznutzz]

Yeah that's what I thought from watching all these videos on YouTube everyone seems to have the same idea that u can't overwover with coco but I don't know. The other day I watched a video and the guy said he even watered his thirsty plants once every 12 hours.