What kind of deficienty?????

[speakheavy]

A couple leaves on each plant have been spotting like this and getting worse but verrryyy slowly, and the second set of pics are a little different, only the bottom leaves on seedlings spot up yellow, then the whole leaf turns yellow, they spot up brown, and then die, perhaps over the course of like 7-10 days. At first I thought the first set of spotting was magnesium so i added Epsom salt to a plain watering but it doesnt seem like it did much. The second set (completely yellow leaves with brown spots on the smaller seedling) i have no idea. The tops look great and healthy but the bottom leaves do this, they all get the same concentrate of chems when I chem feed, week 3 of the floral series drain to waste program. Any insight would be great as I havent seen this spotting before this grow. Thanks for your time!

 

[speakheavy]

Posted thread by accident... Here are the pics

 

[speakheavy]

Second set with the small seedlings

 

[speakheavy]

Also temps are 82 degrees F and 34% humidity, great airflow bc my lights get a bit warm

And the second set with the smaller plants is 79 degrees by 30%

 

[hotrodharley]

How close is your light? I see heat stress among other issues.

 

[speakheavy]

How close is your light? I see heat stress among other issues.

approx 20 inches away from the canopy rn, the second netting i setup as the maximum height they can be before flowering

in the tent is 1 full spectrum led light in the middle (like 130w or something) and 2 200w (real wattage) COBB LED lights

 

[hotrodharley]

approx 20 inches away from the canopy rn, the second netting i setup as the maximum height they can be before flowering

in the tent is 1 full spectrum led light in the middle (like 130w or something) and 2 200w (real wattage) COBB LED lights

Suggest raising to about 30".

 

[shawnery]

Those vpd numbers are way off. It's not that you can't or people don't grow grest bud at those numbers but it's not the perfect environment. I would at the least get it up to 50% humidity and even that's still low. Even if you hang a wet towel in front of a fan it will help a lot.

Vapor Pressure Deficit

My side opinion.

 

[speakheavy]

Those vpd numbers are way off. It's not that you can't or people don't grow grest bud at those numbers but it's not the perfect environment. I would at the least get it up to 50% humidity and even that's still low. Even if you hang a wet towel in front of a fan it will help a lot.

Vapor Pressure Deficit

My side opinion.

Suggest raising to about 30".

Currently I have 1 4 inch and 1 6 inch exhaust fan (passive input) only because the COBBs give off crazy heat in such a small tent. And with the tent being small (4 x 2 x 5) I'll switch out the cobbs for 3 full range LEDs like the one in the middle. Therefore I'll have not as intense lighting if this is heat burn, and with less heat I can turn off the 6 inch fan to allow more humidity. Worst case scenario i have a vicks humidifier but with such a small tent I doubt itll be nessesary, thank you both for your advice.

 

[shawnery]

From my understanding Cobbs are about as good as you can get when it comes to LED fixtures.

 

[shawnery]

Do you have a thermostat controller? What I do do and would you if I was you would be to connect your exhaust fan to your thermostat controller set the highest temperature your willing to accept in your grow room connect that to your exhaust fan and allow that to control everything. I also use a humidistat controller for my humidifier set to the lowest possible setting I'm willing to accept. By doing this I have been able to have my environment as perfectly as possible within a 5 or 10 minutes of their fans being on or off.

 

[speakheavy]

Suggest raising to about 30".

Do you have a thermostat controller? What I do do and would you if I was you would be to connect your exhaust fan to your thermostat controller set the highest temperature your willing to accept in your grow room connect that to your exhaust fan and allow that to control everything. I also use a humidistat controller for my humidifier set to the lowest possible setting I'm willing to accept. By doing this I have been able to have my environment as perfectly as possible within a 5 or 10 minutes of their fans being on or off.

Update: new growth starts off well but leaves below them start to deteriorate, this one being one of the worst

 

[mbajohn1990]

Suggest raising to about 30".

I thought lights should be about 6" from the plants. Is the recommended 30" because these are leds?
edit- just read that leds require 2' of space between plants

 

[hotrodharley]

I thought lights should be about 6" from the plants. Is the recommended 30" because these are leds?
edit- just read that leds require 2' of space between plants

At least 2' and in this case higher until issues start to disappear.

 

[shawnery]

I have my lights, led, only 18" at the furthest and 12" the closest with no heat stress or any other light induced issues. I find that distance has mpre to do with coverage then the damaging effects of the lights. I had my clones 6" close to a double cob with zero negative effects.

 

[joe9000]

Might be wrong but that leave looks like phosphorus deficient,maby wrong though,3 week into flowering it will be needing alot of P!

 

[speakheavy]

At least 2' and in this case higher until issues start to disappear.

I’m just now realizing the only plants that show any sign of being unhealthy are monster cropped clones taken from flowering, every normal begging clone is perfectly fine and every clone taken from flowering week 1/2 is showing these signs whether slight or Severe, I have no idea if that has any relevance here

I have my lights, led, only 18" at the furthest and 12" the closest with no heat stress or any other light induced issues. I find that distance has mpre to do with coverage then the damaging effects of the lights. I had my clones 6" close to a double cob with zero negative effects.

Yea my last grow I had buds fractions of an inch away from the COBBs and I’d have to move them back down every morning and I had 1 leaf ever damage from burn so I don’t think this is a light issue

Might be wrong but that leave looks like phosphorus deficient,maby wrong though,3 week into flowering it will be needing alot of P!

As I said before every issue I’m having is with a clone taken from flowering, could the plant be expecting a different concentration of chemicals or does that not matter because it’s revegged? There are still little preflower knobs covered in THC all over the nodes of these plants, the only plants that are normal are the small small seedlings in the 2nd set of pictures and those are from seeds so I’m leaning more towards a genetics thing with them, they’re gorilla glue and every other pant pictured is super skunk FYI

 

[hotrodharley]

I’m just now realizing the only plants that show any sign of being unhealthy are monster cropped clones taken from flowering, every normal begging clone is perfectly fine and every clone taken from flowering week 1/2 is showing these signs whether slight or Severe, I have no idea if that has any relevance here



Yea my last grow I had buds fractions of an inch away from the COBBs and I’d have to move them back down every morning and I had 1 leaf ever damage from burn so I don’t think this is a light issue


As I said before every issue I’m having is with a clone taken from flowering, could the plant be expecting a different concentration of chemicals or does that not matter because it’s revegged? There are still little preflower knobs covered in THC all over the nodes of these plants, the only plants that are normal are the small small seedlings in the 2nd set of pictures and those are from seeds so I’m leaning more towards a genetics thing with them, they’re gorilla glue and every other pant pictured is super skunk FYI

Are you feeding bloom nute schedule? If not you should consider it.

 

[speakheavy]

Are you feeding bloom nute schedule? If not you should consider it.

Will try this next feed.

 

[speakheavy]

Are you feeding bloom nute schedule? If not you should consider it.

Will try this next feed.