What causes this??

Hey,

Im a noob this is my first time growing, 3rd week of flowering and today I noticed 2 of my 4 girls have these kinda leaves in the middle part of the plant. Im using Biotabs organic fertiliser kit and Autopot system, coco coir and clay pebbles,600w hps. The temp havent been over the "optimal" or nothing. Dont kno about humidity.

Zeke92 said:

Hey,

Im a noob this is my first time growing, 3rd week of flowering and today I noticed 2 of my 4 girls have these kinda leaves in the middle part of the plant. Im using Biotabs organic fertiliser kit and Autopot system, coco coir and clay pebbles,600w hps. The temp havent been over the "optimal" or nothing. Dont kno about humidity.
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Greetings: Zeke92
It looks like light burn. The 2 plants showing damage you might try moving. Put your hand just above the canopy of your plants if your hand feels the heat so dose your plant(s). You need to get a humidistat because temps and humidity are an important part of your plants potency. Use these web sites to help diagnose your plant problems I use them. http://www.growweedeasy.com/marijuana-symptoms , http://www.thenug.com/galleries/diagnose-your-sick-marijuana-plants

Zeke92 said:

Hey,

Im a noob this is my first time growing, 3rd week of flowering and today I noticed 2 of my 4 girls have these kinda leaves in the middle part of the plant. Im using Biotabs organic fertiliser kit and Autopot system, coco coir and clay pebbles,600w hps. The temp havent been over the "optimal" or nothing. Dont kno about humidity.
View attachment 3180358 View attachment 3180360

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Hey Zeke, are you sure the temp is ok cause looks like heat stress - what about ventilation & airflow? perhaps the ladies are too close to the light. Also make sure the pH is fine, a lot of issues are caused by this. good luck