What’s Wrong with my Leaves?

[RoastClash]

Two types of problems on 2 diff plants. First leaf tips and blades are curling up and look almost burned or yellowish.

Second is more severe. Leaf ends curled down and almost dried up, these are some drastic curles.

Growing in 2Gl air pots, 600W MH light hung 34” from plant tops. Growing in Happy Frog.

 

[shawnery]

That it so much light. You could be using T5's with those tiny girls.

Your pots look very dry but hard to tell from here.

To much light, to much heat and most likely not enough humidity will cause the lifted serrations and can slso cause nutrient burn from increased uptake from insufficient VPD numbers.

Just a guess though!

 

[RoastClash]

That it so much light. You could be using T5's with those tiny girls.

Your pots look very dry but hard to tell from here.

To much light, to much heat and most likely not enough humidity will cause the lifted serrations and can slso cause nutrient burn from increased uptake from insufficient VPD numbers.

Just a guess though!

Honestly light burn has been the most popular answer everywhere I posted this. I moved my MH up to 40” at 100% lumens think that good enough? My canopy temp is current 25.5 at 40% humidity.
Also that pic was taken just before I watered my plants, I got them all happy n wet now

 

[shrxhky420]

It's not too much light but it is a lot more than what you need at current stage. Not a big deal.
Have you fed them nutes already?
What are temperatures like?

SH420

 

[RoastClash]

It's not too much light but it is a lot more than what you need at current stage. Not a big deal.
Have you fed them nutes already?
What are temperatures like?

SH420

Havnt done any nutes yet. Growing in happy frog. Ive moved my MH up to 40” and turned the lumens down to 75%. Been about half an hr and the canopy temp is 24.4 and 46% humidity (after I left bowls of water all about the grow tent inside.) Think I’m good? Should I turn back up to 100%, reduce/increase height?

 

[shrxhky420]

Do you have a fan blowing on the plants?
I've never used happy frog so I'm not sure if it's hot

SH420

 

[RoastClash]

Do you have a fan blowing on the plants?
I've never used happy frog so I'm not sure if it's hot

SH420

I do yes have an oscillating fan going on then 24/7. My intake/outtake turn off with my lights. I’ve noticed though right before lights/fans on again my humidity reaches as high as 85%. Then once fans go on in 10min it balances back out to me 35-40 range, is that anything to be concerned? I’m on 18-6 of course.

As far as happy frog this is my first time growing with it, so I just know what Ive read

 

[RoastClash]

Do you have a fan blowing on the plants?
I've never used happy frog so I'm not sure if it's hot

SH420

That what I have, 2 Hygros one at canopy level the other a little higher

 

[shrxhky420]

I do yes have an oscillating fan going on then 24/7. My intake/outtake turn off with my lights. I’ve noticed though right before lights/fans on again my humidity reaches as high as 85%. Then once fans go on in 10min it balances back out to me 35-40 range, is that anything to be concerned? I’m on 18-6 of course.

As far as happy frog this is my first time growing with it, so I just know what Ive read

You can probably leave your exhaust fan on when lights off. 85% is high. You can probably leave your intake fan off. Monitor and adjust.
Fan could also cause leaf damage if blowing too hard...

SH420

 

[abalonehx]

I just had some youngins look burnt in Happy Frog. Started some in Ocean Forest and are fine.

 

[RoastClash]

You can probably leave your exhaust fan on when lights off. 85% is high. You can probably leave your intake fan off. Monitor and adjust.
Fan could also cause leaf damage if blowing too hard...

SH420

Alright sweet thank you! This is along the lines of what I assumed to be the proper next steps to take. I’ll see what 75% lumens at 40’ does. The oscillating fans I think are alright theyre just moving them slightly then giving them a moment of rest the leaf problems were both on the opposite side of the fans path anyway. Cheers! Appreciate the advice

 

[shawnery]

You can test your lumens with your phone and a light meter app. I find it to be helpful in deciding what to look at when issues occur.

 

[AndromedaM31]

Yeah I'm going to agree mostly with everyone else. Looks like too much light, or heat stress.
I've even heard of having fans blowing too hard on your plants can cause these symptoms by drying out the leafs faster than they can move water.
With small plants that domt have a thoroughly established root system, RH, and temps can be the difference between life and death, whereas later on the difference is yield and quality. Severe cases hermie.
Make a few adjustments and they should be doing just fine in a couple days.