Nutrient Burn

[StonerThor]

Looks like a nutrient burn to me, anyone disagree?

This is a breakdown of the setup:
Strain - Unknown (Random seeds from a banky)
# of Plants - 3
Grow Type - Soil
Grow Stage - Vegetative
Lights - 250W Metal Halide
Nutrients - SeaGro Organic Plant Food
Medium - Roughly 35% Worm castings 35% Potting soil 25% Perlite
PH - 6.5
Room Temperature - 68 to 78
Room Square Footage - 2'x 2'x 4' = 16
Pests - None Known

 

[BuckSwope]

Looks like it to me. How often and how much are you feeding? And roughly how old are they?

 

[KingJohnC]

Your leaf damage appears to be nutrient burn, I would slightly reduce your nutrient strength.

You want pH 5.8 for hydroponic and soiless (peat moss and coco coir) and pH 6.5 for soil.

Here is a nutrient availability chart

Here is a cannabis leaf deficiency chart

here is the Cannabis Plant and Pest Problem Solver and the Plant Abuse Chart

Cannabis Plant and Pest Problem Solver: Pictorial

Plant Abuse Chart

 

[WizHigh]

Your leaf damage appears to be nutrient burn, I would slightly reduce your nutrient strength.

You want pH 5.8 for hydroponic and soiless (peat moss and coco coir) and pH 6.5 for soil.

Here is a nutrient availability chart

Here is a cannabis leaf deficiency chart

here is the Cannabis Plant and Pest Problem Solver and the Plant Abuse Chart

Cannabis Plant and Pest Problem Solver: Pictorial

Plant Abuse Chart

Hey King John , dont forget about the PPM-nute strength. Always make sure your nutes arent to strong for your plant, other wise youll have nute burn as above