First time grower browning curling leaves

[Jsimp342]

can’t figure out what’s going on here any suggestions? Water till very wet and let dry out before more water, Temp 65 or so, humidity 35 or so, One Vivison 100watt light over each plant on 18 off 6, ph of water used around 6ph. In a tent with air moving 18 hrs per day

 

[Og_punkgenetics]

A couple things, what are you feeding it? And your humidity is way low . you want your temps around 70to 80 and rh around 60-65 %. It looks like it’s calcium deficient, but it also looks like there might be root issues because of the way the leaves are curling up.

 

[Jsimp342]

A couple things, what are you feeding it? And your humidity is way low . you want your temps around 70to 80 and rh around 60-65 %. It looks like it’s calcium deficient, but it also looks like there might be root issues because of the way the leaves are curling up.

It’s in fox farm soil I added very little fox farm big bloom first time a week ago half of what reccomended for first feeding. I can bring temp and humidity up for sure. There is what looks like calcium or fungus on bottom of pot from what I read this was ok

 

[2Bad]

How close is your light? Have you spilled any nutrients on the leaves? And you def need a humidifier.

 

[Jsimp342]

How close is your light? Have you spilled any nutrients on the leaves? And you def need a humidifier.

Lights are probably 16 inches above, might have got some very low leaves under plant it was liquid nutes mixed with distilled, i water with distilled seems to be spot on ph 6

 

[Moe.Red]

Your VPD is out to lunch. You will fix this with your environmental changes but those leaves are toast go ahead and pull them once you get your temp and rh up and stable.

 

[2Bad]

Hmm. @Moe.Red why would the environment cause burned leaves? It's sounding like nutrients. What nutes? what type of light? you need to raise humidity for sure it causes issues that most of us don't deal with because we have correct environment. 65 temp is fine it will just grow much-much slower.

Edit: Whats your ec/ppm

 

[Jsimp342]

Hmm. @Moe.Red why would the environment cause burned leaves? It's sounding like nutrients. What nutes? what type of light? you need to raise humidity for sure it causes issues that most of us don't deal with because we have correct environment. 65 temp is fine it will just grow much-much slower.

Edit: Whats your ec/ppm

I mixed 2 tablespoons of this in a gallon of distilled water and probably used 1/2 gallon between two plants both 5 gallon pots only one watering so far with it. Been a month since transplanted into the 5 gallon with fox farm soil

 

[Jsimp342]

Hmm. @Moe.Red why would the environment cause burned leaves? It's sounding like nutrients. What nutes? what type of light? you need to raise humidity for sure it causes issues that most of us don't deal with because we have correct environment. 65 temp is fine it will just grow much-much slower.

Edit: Whats your ec/ppm

I have two vs1000 lights one over each plant running at 100 watts each

 

[Moe.Red]

Hmm. @Moe.Red why would the environment cause burned leaves?

Because VPD sets respiration. Respiration sets speed mutes get taken into the plant.

 

[Jsimp342]

Because VPD sets respiration. Respiration sets speed mutes get taken into the plant.

Faster intake in lower humidity? Or not taking in enough

 

[Moe.Red]

Ok so I didn't do a good job of explaining, but there are tons of posts and info on VPD, so you can study up with a little searching. Rather than restate everything already stated, I'll give you an analogy.

Lets say you have a bucket of salt water and a hose / pump that moves the water to another bucket. You are trying to get some exact amount of salt from the source bucket to the 2nd bucket.

If the pump is very slow, you have to add salt to the source bucket to get the proper amount of salt to the collection bucket. If the pump is too fast, you get too much salt.

What if you could put a speed control on the motor? Could you not then adjust the speed of the motor to end up with the exact amount of salt desired in the collection bucket?

This is how it works with plants. VPD is (partially) what controls the opening of stomata, the exchange of gasses under the leaf, and therefore the amount of water and salt delivered to the plant. If you don't have proper control over that motor and it runs continuously or not at all, adding or removing nutes from the mix is a band aid.

My suggestion is to get the plant respiring optimally as step one. Then remove the damaged leaves. Then look at how the plants respond, and adjust nutes at that point knowing that you have the speed of uptake problem in hand, so your nute adjustments mean something and you are not chasing your tail.

 

[growsince79]

can’t figure out what’s going on here any suggestions? Water till very wet and let dry out before more water, Temp 65 or so, humidity 35 or so, One Vivison 100watt light over each plant on 18 off 6, ph of water used around 6ph. In a tent with air moving 18 hrs per day

Back off the light and get the temp to 80f

 

[2Bad]

Back off the light and get the temp to 80f

agreed

 

[Jsimp342]

Back off the light and get the temp to 80f

Heater is up now it fluctuates between 70-80 that’s the best I can do unless I get a more even heater. Humidifier on full board but not bringing rh up any yet with the heater running more. I backed lights off to 75 watts each and raised them up close to 20 inches probably. Pictures of plants trimmed I left a few leaves that were questionable. Also pics of set up let me know if you see anything you would do differently. Exhaust is on lowest speed but still pulls heat out fast, tent is in 65 degree unfinished basement

 

[Moe.Red]

So what you need to do is get a fan controller that only turns the exhaust on when temp or RH numbers dictate. Inkbird sells them pretty cheap, but there are lots to choose from on Amazon.

Having the fan on full time in your conditions is not gonna be what you want.

Plants will recover fine.

Amazon.com

Edit - I know you were told to lower light power - I personally would not. You need the heat, and I don't see light stress, but to each his own I guess.

Edit Edit - once you get these plants respiring properly and don't constantly pull out the humidity, you probably will not even need the humidifier. These plants will put a lot of humidity in the air once things are dialed in.

 

[Jsimp342]

So what you need to do is get a fan controller that only turns the exhaust on when temp or RH numbers dictate. Inkbird sells them pretty cheap, but there are lots to choose from on Amazon.

Having the fan on full time in your conditions is not gonna be what you want.

Plants will recover fine.

Amazon.com

Edit - I know you were told to lower light power - I personally would not. You need the heat, and I don't see light stress, but to each his own I guess.

Edit Edit - once you get these plants respiring properly and don't constantly pull out the humidity, you probably will not even need the humidifier. These plants will put a lot of humidity in the air once things are dialed in.

That makes sense. You would run just the fan through the temp controller for the control and have heater set on say 75 and humidifier just run 24/7?

Right now I have fan running with light cycle timer 18 on 6 off, I thought I needed exhaust most the time to keep airflow

I will turn lights back up to 100 watts but keep them up around 20 inches

 

[Moe.Red]

Ok so there are 2 outputs on the one I linked. I is for temp one for hum. You can set them to control up or down and set a deadband. I would set the heater for 80 and plug the fan into work 1 and set it to control down (cool mode) at a set point of 78f with a dead band of 5 or so.
Then plug the hum into work 2 and set that to the desired rh which will change as the plants age

once the plants overpower the humidifier you would then set it up where the fan comes on when it is too hot or too wet.

once these plants get into flower you will want the fan sucking out at night too which will all be controlled at the inkbird.

sounds harder than it is.

 

[Moe.Red]

I’m really good at spending other peoples money but a way to monitor temp things and co2 remotely would be a nice addition.

I just saw on another thread inkbitd is doing a giveaway. Snagging a co2 controller like that will allow you to track co2 even if you don’t supplement with it. Co2 going too low is your only real concern with a cold dry lung room like you have but I doubt it will be an issue with your conditions.

for remote monitoring I use SensorPush and it works great.

if you want to really get your rh in check (your house occupants would enjoy this too with your low rh) you can diy a humidifier with parts here

Ultrasonic Mist Makers & DIY Humidifier Kits | House of Hydro

Ultrasonic mist makers, foggers & DIY humidifier kits — 1 to 12+ disc systems for mushrooms, greenhouses, reptiles, cigars & more. Since 2007.

thehouseofhydro.com

That will raise rh 20 points in 10 minutes and keep going until you shut it off.

 

[Jsimp342]

Ok so there are 2 outputs on the one I linked. I is for temp one for hum. You can set them to control up or down and set a deadband. I would set the heater for 80 and plug the fan into work 1 and set it to control down (cool mode) at a set point of 78f with a dead band of 5 or so.
Then plug the hum into work 2 and set that to the desired rh which will change as the plants age

once the plants overpower the humidifier you would then set it up where the fan comes on when it is too hot or too wet.

once these plants get into flower you will want the fan sucking out at night too which will all be controlled at the inkbird.

sounds harder than it is.

Ok so there are 2 outputs on the one I linked. I is for temp one for hum. You can set them to control up or down and set a deadband. I would set the heater for 80 and plug the fan into work 1 and set it to control down (cool mode) at a set point of 78f with a dead band of 5 or so.
Then plug the hum into work 2 and set that to the desired rh which will change as the plants age

once the plants overpower the humidifier you would then set it up where the fan comes on when it is too hot or too wet.

once these plants get into flower you will want the fan sucking out at night too which will all be controlled at the inkbird.

sounds harder than it is.

That makes a lot of sense. I’ll let you know how I make out when stuff comes in a couple days. Going for better humidifier and ordered the link you sent for temp humidity controller.

Yeah I figured when flowering I’ll need to keep smell out with exhaust full time but temps and humidity can be lower from what I read