Please help, my plants are burning, and I cannot figure out what the issue is

[Drdanky]

I have noticed brown burns on some of the leaves, but I can’t figure out what the issue is

I am assuming either heat stress, light stress, or some type of deficiency, but I would like some professional input before I pumped them with extra nutrients and potentially damage them further

I am only using Athena grow an and grow be nutrients currently.

The soil is three kings.

I have attached the video below, please let me know what you all think

 

[Gmix]

Drop a pic in of the whole plant

Videos don’t work when trying to give a plant the once over as there to shaky & you can’t zoom in.

It’s easier when we get stills it allows us to zoom in when we need to etc

Btw from what I can see what are you feeding organic or synthetic nutrients & are you ph-ing

How hots it getting & what’s your humidity

How close is the light and what wattage is it?

 

[Drdanky]

First and foremost, thank you for getting back to me so quickly, I really appreciate any and all insight you may have.

This is my second grow and the first one was over 10 years ago, so I’m not super knowledgeable

-for nutrients, I am using Athena grow a and grow be, I have not supplemented with anything else so far nor have I used anything for pH.


-I have attached a picture of my VIVO son thermostat and humidifier checker to give you the temperature and humidity

-I also attached photos of the plant damage below

-grow light is I believe 600 W LED although I have it almost at the lowest possible setting currently as I was told, I don’t need to crank it up until flowering


-temperature is usually under 80°


-I have CO2 with a 8 inch in-line fan, but I don’t run it often because it sucks the entire tent in, I think it’s too powerful for my 4 x 4 tent, please give me any insight if I am wrong or if I need to get a smaller fan


-I attached a photo of the plant so you can gauge the distance from the light


I currently have one fan circulating outside of the one connected to the CO2
Do you think I need multiple or is one fine this early on?


Please let me know if there’s anything I missed or if you need any additional information

Thanks again for getting back to me, I really appreciate your help.

Last thing I want is for these plans to die and for me to start from scratch almost 4 weeks in

Drop a pic in of the whole plant

Videos don’t work when trying to give a plant the once over as there to shaky & you can’t zoom in.

It’s easier when we get stills it allows us to zoom in when we need to etc

Btw from what I can see what are you feeding organic or synthetic nutrients & are you ph-ing

How hots it getting & what’s your humidity

How close is the light and what wattage is it?

 

[Gmix]

No problem

The co2 throws me a bit as am not familiar with using it. I do have limited knowledge of it.

The nutes your using are hydroponic nutrients is your medium coir or soil.

With synthetic nutrients, pH is important.

If you’re not monitoring it, it would explain why your plant looks like it does.

It will effect witch nutrients are taken up and which ones are suppressed.

Your plant also looks stressed witch maybe from the ph & or the co2

Are you monitoring the co2 levels it’s important you do as you could well be in overdosing the co2

To run co2 effectively you need a sealed room
Are you using tanks of co2 or some other method

You say it’s blowing out the tent does that mean you’ve no extraction fan. I ask because of the need for a sealed room

Until your plant gets healthy stop introducing co2 as it speeds everything up

You need to get a ph pen & find out what your ph is and if you wish to continue using co2 you need to monitor the co2 levels

With the co2 being involved Ill ask some fellow growers to chime in @Eledin @HerbalEdu
@amneziaHaze

 

[Oldchucky]

No problem

The co2 throws me a bit as am not familiar with using it. I do have limited knowledge of it.

The nutes your using are hydroponic nutrients is your medium coir or soil.

With synthetic nutrients, pH is important.

If you’re not monitoring it, it would explain why your plant looks like it does.

It will effect witch nutrients are taken up and which ones are suppressed.

Your plant also looks stressed witch maybe from the ph & or the co2

Are you monitoring the co2 levels it’s important you do as you could well be in overdosing the co2

To run co2 effectively you need a sealed room
Are you using tanks of co2 or some other method

You say it’s blowing out the tent does that mean you’ve no extraction fan. I ask because of the need for a sealed room

Until your plant gets healthy stop introducing co2 as it speeds everything up

You need to get a ph pen & find out what your ph is and if you wish to continue using co2 you need to monitor the co2 levels

With the co2 being involved Ill ask some fellow growers to chime in @Eledin @HerbalEdu
@amneziaHaze

Looks like the soil is 30% cocoa and 70% moss! Looks like it’s supposed to be grown as soil! So regular dry backs. Almost looks like they are getting too much light! Pretty squat! Just kind of chirping here till somebody that knows what they’re talking about Shows up! Hang in there!

 

[Gmix]

Looks like the soil is 30% cocoa and 70% moss! Looks like it’s supposed to be grown as soil! So regular dry backs. Almost looks like they are getting too much light! Pretty squat! Just kind of chirping here till somebody that knows what they’re talking about. Shows up! Hang in there!

Haha I actually meant to ask you to chime in
The hydro nutes in that medium totally throws me.

Yeah same thing hopefully someone who knows more chimes in @Grownsince95 is another that might know more

Edit

Yeah I noticed the light he said he turned it down do you think it maybe old light damage & the ph not being monitored

Btw do have a fan blowing directly on the plant

 

[Grownsince95]

Looks like they're under a lot of pressure from the light in less than ideal environmental/feeding conditions. I put the / because those two things are directly related.

Also looks like you reset your high/low on the thermometer/rh right before you took that pic. That tells me there's more to the story than we are seeing. Unless you are running your lights 24/7 there's no way to keep that kind of consistency.

More accurate info is needed to correctly diagnose what's going on.

 

[Thatoneguyyouknow_]

Looks like they're under a lot of pressure from the light in less than ideal environmental/feeding conditions. I put the / because those two things are directly related.

Also looks like you reset your high/low on the thermometer/rh right before you took that pic. That tells me there's more to the story than we are seeing. Unless you are running your lights 24/7 there's no way to keep that kind of consistency.

More accurate info is needed to correctly diagnose what's going on.

^This guy right here^ Listen to this guy.

im way too long winded and talk in circles way too much to actually get the light intensity/nutrient requirements stuff across to most.

Tis a nuanced thing to cleanly explain why someone needs to back a light up, even though thats not what actually the root of a problem. And that it isn't a solution to a problem even though the issue may appear to resolve itself from the action.

You have in experienced growers trying to flower plants with nutrient requirement issues under the kind of par my 6 week old seedlings are under to avoid light stress, wondering why their flowers aren't as dense as the dispo down the road.


The best i can do is ramble in circles for 5 paragraphs, then say there's a reason my banjo and haymeadow are praying into like 1500-1800 ppfd every day and it's definitely not magic (disclaimer: bit of an extreme example, they can take more then most, but most healthy plants can easily take 5-600 in veg, 800-1000 flower no problem at all. And i consider a little bit of light burn center-tent, upper colas, an indicator the bulk of the canopy is in the goldilocks zone.)

Sorry for thread hijack , I just haven't ever seen anyone else point that relationship out here.

 

[Gmix]

Looks like they're under a lot of pressure from the light in less than ideal environmental/feeding conditions. I put the / because those two things are directly related.

Also looks like you reset your high/low on the thermometer/rh right before you took that pic. That tells me there's more to the story than we are seeing. Unless you are running your lights 24/7 there's no way to keep that kind of consistency.

More accurate info is needed to correctly diagnose what's going on.

I never noticed the high low
I run 24/7 & my humidity/temps fluctuation isn’t consistent. Good eye you got there bud. I still think there’s a ph issue ( as well as a light issue, food & the other things you mentioned ) would you disagree or agree.

I would have thought so with the nutrients not being organic & synthetic nutrients needed to be ph-ed

Reason for asking is I advised him to buy a ph pen

 

[Grownsince95]

I never noticed the high low
I run 24/7 & my humidity/temps fluctuation isn’t consistent. Good eye you got there bud. I still think there’s a ph issue ( as well as a light issue, food & the other things you mentioned ) would you disagree or agree.

I would have thought so with the nutrients not being organic & synthetic nutrients needed to be ph-ed

Reason for asking is I advised him to buy a ph pen

Yeah I agree! I think having the ability to measure pH and EC will benefit every grower, even if you only bust it out once in a blue moon to make sure everything is in check.

And 100% necessary when using synthetic nutes in my book.

 

[Gmix]

Thanks bud I’d loathe to have thought I advised someone to buy something they didn’t need.

 

[Drdanky]

Yeah I agree! I think having the ability to measure pH and EC will benefit every grower, even if you only bust it out once in a blue moon to make sure everything is in check.

And 100% necessary when using synthetic nutes in my book.

Thanks again for taking the time to chime in and offer your insight, I really appreciate it.

I have a PH tester but every time I test I’m getting different numbers even when I am testing the same plans 10 minutes apart, is there a particular one you recommend for soil/Coco?

I think it might be pH as well, but I don’t feel comfortable enough to go off of the pH tester that I am using to up or down the pH because I am worried it might be wrong and I may end up making things worse.


I have the lights running for 18 hours on and six hours off as the plants are still in vegetative phase.

Also, there is a book that Athena has for its feeding schedule and looks like you can use it in Coco as well as hydroponic so I don’t think there’s an issue there although I’m not 1,000,000% sure.

I raised the light this morning, I am hoping that will help in the meantime

 

[Oldchucky]

Your medium is 70% sphagum peat and 30% Coco! And it does contain some lime! Don’t know if it’s enough to buffer the pH! But might be!

 

[Grownsince95]

Yeah those nutes are good and I read a little about the medium you're using and it seems well made too. It's a bit of a hybrid between soil and straight coco blends used for hydro. The biggest difference I see is that it may hold on to a bunch more water than a standard 70/30 coco blend.

So, couple of things... First is, what is your source water? Municipal tap, well or RO? This is a huge first step in understanding what's going on as it's the foundation of your whole grow.

Second thing, when you mentioned you supplement CO2, how exactly is this being done? With tanks and a regulator or something else?

And the last question I have is about your watering practices. Can you describe exactly how you go about feeding and watering them?

 

[Grownsince95]

Thanks again for taking the time to chime in and offer your insight, I really appreciate it.

I have a PH tester but every time I test I’m getting different numbers even when I am testing the same plans 10 minutes apart, is there a particular one you recommend for soil/Coco?

I think it might be pH as well, but I don’t feel comfortable enough to go off of the pH tester that I am using to up or down the pH because I am worried it might be wrong and I may end up making things worse.


I have the lights running for 18 hours on and six hours off as the plants are still in vegetative phase.

Also, there is a book that Athena has for its feeding schedule and looks like you can use it in Coco as well as hydroponic so I don’t think there’s an issue there although I’m not 1,000,000% sure.

I raised the light this morning, I am hoping that will help in the meantime

Your feeding instructions specifically say to use one of their products as a pH up, are you doing that? It makes me think their blend mixes up pretty acidic. Also, you want to follow the instructions for peat based mediums not coco.

 

[captainkong]

Hey so just an update. I don't know if you guys can tell a difference from the pic I uploaded the other day. But I think they are looking slightly better.... Maybe I'm just being too optimistic.

Anyways, I just got the cal mag in the mail today. Will wait until the pot is light to add it to the water.

 

[Drdanky]

Yeah those nutes are good and I read a little about the medium you're using and it seems well made too. It's a bit of a hybrid between soil and straight coco blends used for hydro. The biggest difference I see is that it may hold on to a bunch more water than a standard 70/30 coco blend.

So, couple of things... First is, what is your source water? Municipal tap, well or RO? This is a huge first step in understanding what's going on as it's the foundation of your whole grow.

Second thing, when you mentioned you supplement CO2, how exactly is this being done? With tanks and a regulator or something else?

And the last question I have is about your watering practices. Can you describe exactly how you go about feeding and watering them?

Again, I really appreciate you reaching out and offering your insight to help!

I am currently using tapwater.

Every time the plants are dry, and the pots are very light. I am watering with grow A and grow B.

I am not using balance currently nor am I using CaMg.

Going to get CaMg tomorrow.


I have a CO2 tank connected to a fan and ducts above the light, I am attaching a photo below

 

[Gmix]

The only ph pen I have used that I trusted was a blue labs one however they are pretty expensive.

@captainkong make your own thread no offence it’s just not really the right way to go about things

 

[Grownsince95]

CO2 tanks and exhaust fans pretty much cancel each other out. You either run a closed room with CO2 or you don't.

When you run synthetic nutes in a medium you let dry out, whatever has not been used by the plant will concentrate as it evaporates. Repeat this cycle enough and your medium will develop toxic levels of excess salts. This is especially true if the root zone has not completely filled the pot yet.

Because you are not measuring EC or pH, there's no way of knowing exactly what's going in or out. If Athena wants you to use their balance product as a pH up every feeding, it's likely the blend of ferts they use mixes up very acidic, possibility even outside the ideal range for cannabis.

Check the ppm of your tap water before starting calmag, you could inadvertently make the problem worse because calmag is a very high EC product.