Leaves breaking: help

[littlepiggies]

Room temperature is good, humidity too, ph controlled aswell and the other plants are looking healthy

this one always showed growth problems and today the leaves are very strange, I changed the pot recently so it’s a lot smaller than the others

Any tip?

 

[Pennywise]

Looks like heat stress to me.

 

[littlepiggies]

The max temperature is 28 and the minimum is 22
The lamp (HPS) is 40 cm away
Doesn’t seem heat problems to me
How can I test it tho?

 

[Apoc]

Heat stress and possibly light a hair to close.

Move light up 1-2 inch and increase ventilation.

 

[Emilya Green]

looks like a bit of sunburn... its not so much the heat... it is just more LUX than the plant can handle at this point. I suggest purchasing a light meter so you can adjust the distance of that LED accurately, with no guessing. I have a $30 FC/LUX meter that does a pretty good job of measuring this light. We know that clones and seedlings need between 5000-7000 LUX for optimum growth. We know that in Veg the plants can take a lot more light and depending on how big they are, 15k-50K LUX is appropriate for optimum growth. In flower we can hit them with even more light, and 45K-65K LUX will do just fine. Some plants can stand up to 75K LUX in flower, but you are in risky territory of bleaching up here, and generally anything over 85K would be lethal.

 

[Emilya Green]

@littlepiggies,
Welcome to the forum! How did you find us?